From da430cca565c7828d821f42575ceba2b770de077 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 11 Feb 2026 15:07:41 -0500 Subject: [PATCH 01/60] updated README --- README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 46ac9e85..19184b75 100644 --- a/README.md +++ b/README.md @@ -1,7 +1,7 @@ # Status -[![.github/workflows/ci.yml](https://github.com/clause/471c/actions/workflows/ci.yml/badge.svg)](https://github.com/clause/471c/actions/workflows/ci.yml) -[![Coverage](https://codecov.io/gh/clause/471c/branch/main/graph/badge.svg)](https://codecov.io/gh/clause/471c) +[![.github/workflows/ci.yml](https://github.com/jtfulky/471c/actions/workflows/ci.yml/badge.svg)](https://github.com/jtfulky/471c/actions/workflows/ci.yml) +[![Coverage](https://codecov.io/gh/jtfulky/471c/branch/main/graph/badge.svg)](https://codecov.io/gh/jtfulky/471c) # Contributing From 4757202f0a6cd6987120a04e2c89bf5699e57a95 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Feb 2026 12:28:41 -0500 Subject: [PATCH 02/60] L3 README with some inclass work on tests/check implementation --- packages/L1/README.md | 11 +++++++++++ packages/L3/src/L3/check.py | 13 ++++++++----- packages/L3/test/L3/test_check.py | 10 ++++++++++ 3 files changed, 29 insertions(+), 5 deletions(-) diff --git a/packages/L1/README.md b/packages/L1/README.md index e69de29b..919bc4a2 100644 --- a/packages/L1/README.md +++ b/packages/L1/README.md @@ -0,0 +1,11 @@ +L3 + +The L3 Compiler is an expression based language with named variables, functions, arithmetic, conditionals, and explicit heap operations. There is an Identifier that names variables and functions as well as a Program that contains parameters and a single term body. A term is a unioned type of all avalible constructs. + +Bindings and variables let and letrec bind different identifiers to terms; and then reference reads a bound name. Unlike let, letrec supports self-reference for recursive definitions. + +For functions, there is an abstract that defines the function with a list of parameters and a body. Apply is used to invoke a function with given arguments. + +For values and control we have immediate, primative, and branch. Immediate is an integer literal and primitive applies the +, -, or * operator to a left and right term. Branch is then able to be used to evaluate < or == and selects consequent or otherwise since the langage does not support boolean values. + +The last thing that L3 supports is memory and sequencing. Allocate reserves a block of memory, while load reads from the memory and store writes to memory. There is also begin which sequences terms before producing a final value. \ No newline at end of file diff --git a/packages/L3/src/L3/check.py b/packages/L3/src/L3/check.py index 40fdfe5a..8ed41938 100644 --- a/packages/L3/src/L3/check.py +++ b/packages/L3/src/L3/check.py @@ -34,8 +34,10 @@ def check_term( case LetRec(): pass - case Reference(): - pass + case Reference(name=name): + match context.get(name): + case None: + raise NameError(f"Undefined variable: {name}") case Abstract(): pass @@ -43,11 +45,12 @@ def check_term( case Apply(): pass - case Immediate(): + case Immediate(value=_value): pass - case Primitive(): - pass + case Primitive(operator=_operator, left=left, right=right): + recur(left) + recur(right) case Branch(): pass diff --git a/packages/L3/test/L3/test_check.py b/packages/L3/test/L3/test_check.py index 88ff64a1..603a7f42 100644 --- a/packages/L3/test/L3/test_check.py +++ b/packages/L3/test/L3/test_check.py @@ -2,6 +2,8 @@ from L3.check import Context, check_term from L3.syntax import Reference +from packages.L0.src.L0.syntax import Immediate + @pytest.mark.skip() def test_check_reference_bound(): @@ -22,3 +24,11 @@ def test_check_reference_free(): with pytest.raises(ValueError): check_term(term, context) + + +def test_check_intermediate(): + term = Immediate(value=0) + + context: Context = {} + + check_term(term, context) From b985268f7033709ffee2b53d9a6627f83ff69f53 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Feb 2026 12:44:51 -0500 Subject: [PATCH 03/60] I put the L3 readme in the wrong file so fixed that and wrote the L2 readme. --- packages/L1/README.md | 11 ----------- packages/L2/README.md | 3 +++ packages/L3/README.md | 11 +++++++++++ 3 files changed, 14 insertions(+), 11 deletions(-) diff --git a/packages/L1/README.md b/packages/L1/README.md index 919bc4a2..e69de29b 100644 --- a/packages/L1/README.md +++ b/packages/L1/README.md @@ -1,11 +0,0 @@ -L3 - -The L3 Compiler is an expression based language with named variables, functions, arithmetic, conditionals, and explicit heap operations. There is an Identifier that names variables and functions as well as a Program that contains parameters and a single term body. A term is a unioned type of all avalible constructs. - -Bindings and variables let and letrec bind different identifiers to terms; and then reference reads a bound name. Unlike let, letrec supports self-reference for recursive definitions. - -For functions, there is an abstract that defines the function with a list of parameters and a body. Apply is used to invoke a function with given arguments. - -For values and control we have immediate, primative, and branch. Immediate is an integer literal and primitive applies the +, -, or * operator to a left and right term. Branch is then able to be used to evaluate < or == and selects consequent or otherwise since the langage does not support boolean values. - -The last thing that L3 supports is memory and sequencing. Allocate reserves a block of memory, while load reads from the memory and store writes to memory. There is also begin which sequences terms before producing a final value. \ No newline at end of file diff --git a/packages/L2/README.md b/packages/L2/README.md index e69de29b..5fba267f 100644 --- a/packages/L2/README.md +++ b/packages/L2/README.md @@ -0,0 +1,3 @@ +L2 + +L2 has most of the same characteristics as L3 except letrec is missing. Functions, arithmetic, branching, and heap management all remain the same but not having letrec means that recursive bindings are not avalible. \ No newline at end of file diff --git a/packages/L3/README.md b/packages/L3/README.md index e69de29b..c22df315 100644 --- a/packages/L3/README.md +++ b/packages/L3/README.md @@ -0,0 +1,11 @@ +L3 + +The L3 Compiler is an expression based language with named variables, functions, arithmetic, conditionals, and explicit heap operations. There is an Identifier that names variables and functions as well as a Program that contains parameters and a single term body. A term is a unioned type of all avalible constructs. + +Bindings and variables let and letrec bind different identifiers to terms; and then reference reads a bound name. Unlike let, letrec supports self-reference for recursive definitions. + +For functions, there is an abstract that defines the function with a list of parameters and a body. Apply is used to invoke a function with given arguments. + +For values and control we have immediate, primative, and branch. Immediate is an integer literal and primitive applies the +, -, or * operator to a left and right term. Branch is then able to be used to evaluate < or == and selects a consequent or otherwise. + +The last thing that L3 supports is memory and sequencing. Allocate reserves a block of memory, while load reads from the memory and store writes to memory. There is also begin which sequences terms before producing a final value. \ No newline at end of file From 126028c4ea785dcc7cd2f4652cc0c10257167cf0 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Feb 2026 21:41:55 -0500 Subject: [PATCH 04/60] finished l1 and l0 readme content --- packages/L0/README.md | 3 +++ packages/L1/README.md | 3 +++ 2 files changed, 6 insertions(+) diff --git a/packages/L0/README.md b/packages/L0/README.md index e69de29b..da6e2bc1 100644 --- a/packages/L0/README.md +++ b/packages/L0/README.md @@ -0,0 +1,3 @@ +L0 + +L0 is now a procedure based language as compared to our previous expression and statement languages. Here, a program has a sequence of named procedures each containing its own parameters and a statement body. A statement can have copy, immediate, primative, branch, allocate, load, store, address, call, and hault. The main differences are that L0 organizes code into multiple named procedures whereas L1 had a single extry program with a statement body. L1 also uses abstract and apply for its functions where L0 replaces them with address and call removing a layer of abstraction. L0 also makes procedures ex plicity and predefined rather than in others where they were constructred functions at runtime. \ No newline at end of file diff --git a/packages/L1/README.md b/packages/L1/README.md index e69de29b..6eaeb810 100644 --- a/packages/L1/README.md +++ b/packages/L1/README.md @@ -0,0 +1,3 @@ +L1 + +Now in L1 it is a statement based language with very explicit flow control. There exists a program which has parameters and a body, and the statements are similar to L2 and L3 with a few differences. We have copy, immediate, primative, branch, abstract, apply, allocate, load, store, and hault. The differences with L1 as compared to L2 and L3 is that L2 used nested terms as expressions while now L1 replaces all of those with sequential statements. Doing this makes flow control explicit as each statement has a then continuation, except for apply and hault. L1 also adds a copy ability to move values between identifiers, and hault to end the program. L1 removes the idea of let, reference, and begin. \ No newline at end of file From 456ce243f95e06771506c0d40c9b7ab0eba50789 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Feb 2026 21:42:35 -0500 Subject: [PATCH 05/60] in class work --- packages/L3/src/L3/check.py | 62 +++++++++++++++++----- packages/L3/test/L3/test_check.py | 85 ++++++++++++++++++++++++++++--- 2 files changed, 128 insertions(+), 19 deletions(-) diff --git a/packages/L3/src/L3/check.py b/packages/L3/src/L3/check.py index 8ed41938..403fff7a 100644 --- a/packages/L3/src/L3/check.py +++ b/packages/L3/src/L3/check.py @@ -1,5 +1,6 @@ from collections.abc import Mapping from functools import partial +from typing import Counter from .syntax import ( Abstract, @@ -13,6 +14,7 @@ LetRec, Load, Primitive, + Program, Reference, Store, Term, @@ -28,27 +30,50 @@ def check_term( recur = partial(check_term, context=context) # noqa: F841 match term: - case Let(): - pass + case Let(bindings=bindings, body=body): + counts = Counter(name for name, _ in bindings) + duplicates = {name: count for name, count in counts.items() if count > 1} + if duplicates: + raise ValueError(f"Duplicate bindings: {duplicates}") - case LetRec(): - pass + for _, value in bindings: + recur(value) - case Reference(name=name): - match context.get(name): - case None: - raise NameError(f"Undefined variable: {name}") + local = dict.fromkeys([name for name, _ in bindings]) + recur(body, context={**context, **local}) - case Abstract(): - pass + case LetRec(bindings=bindings, body=body): + counts = Counter(name for name, _ in bindings) + duplicates = {name: count for name, count in counts.items() if count > 1} + if duplicates: + raise ValueError(f"Duplicate bindings: {duplicates}") + + local = dict.fromkeys([name for name, _ in bindings]) + + for name, value in bindings: + recur(value, context={**context, **local}) - case Apply(): + check_term(body, context={**context, **local}) + + case Reference(name=name): # Leaf + if name not in context: + raise ValueError(f"Unbound variable: {name}") + + case Abstract(parameters=parameters, body=body): # Done + counts = Counter(parameters) + duplicates = {name for name, count in counts.items() if count > 1} + if duplicates: + raise ValueError(f"Duplicate parameters: {duplicates}") + local = dict.fromkeys(parameters, None) + check_term(body, context=local) + + case Apply(target=target, arguments=arguments): pass - case Immediate(value=_value): + case Immediate(value=_value): # Leaf pass - case Primitive(operator=_operator, left=left, right=right): + case Primitive(operator=_operator, left=left, right=right): # Should be done recur(left) recur(right) @@ -66,3 +91,14 @@ def check_term( case Begin(): # pragma: no branch pass + + +def check_program(program: Program) -> None: + match program: + case Program(parameters=parameters, body=body): # pragma: no branch + counts = Counter(parameters) + duplicates = {name for name, count in counts.items() if count > 1} + if duplicates: + raise ValueError(f"Duplicate parameters: {duplicates}") + local = dict.fromkeys(parameters, None) + check_term(body, context=local) diff --git a/packages/L3/test/L3/test_check.py b/packages/L3/test/L3/test_check.py index 603a7f42..090b737d 100644 --- a/packages/L3/test/L3/test_check.py +++ b/packages/L3/test/L3/test_check.py @@ -1,11 +1,8 @@ import pytest -from L3.check import Context, check_term -from L3.syntax import Reference +from L3.check import Context, check_program, check_term +from L3.syntax import Immediate, Let, LetRec, Program, Reference -from packages.L0.src.L0.syntax import Immediate - -@pytest.mark.skip() def test_check_reference_bound(): term = Reference(name="x") @@ -16,7 +13,6 @@ def test_check_reference_bound(): check_term(term, context) -@pytest.mark.skip() def test_check_reference_free(): term = Reference(name="x") @@ -32,3 +28,80 @@ def test_check_intermediate(): context: Context = {} check_term(term, context) + + +def test_check_term_let(): + term = Let( + bindings=[ + ("x", Immediate(value=0)), + ], + body=Reference(name="x"), + ) + + context: Context = {} + + check_term(term, context) + + +def test_check_term_let_duplicate(): + term = Let( + bindings=[ + ("x", Immediate(value=0)), + ("x", Immediate(value=1)), + ], + body=Reference(name="x"), + ) + + context: Context = {} + + with pytest.raises(ValueError): + check_term(term, context) + + +def test_check_term_not_avaliable_in_initializer(): + term = Let( + bindings=[ + ("x", Immediate(value=0)), + ("y", Reference(name="x")), + ], + body=Reference(name="x"), + ) + + context: Context = {} + + with pytest.raises(ValueError): + check_term(term, context) + + +def test_check_term_letrec_avalible_in_initializers(): + term = LetRec( + bindings=[ + ("x", Immediate(value=0)), + ("y", Reference(name="x")), + ], + body=Reference(name="x"), + ) + + context: Context = {} + + with pytest.raises(ValueError): + check_term(term, context) + + +def test_check_program_duplicate(): + program = Program( + parameters=["x", "x"], + body=Immediate(value=0), + ) + + with pytest.raises(ValueError): + check_program(program) + + +def test_check_program(): + program = Program( + parameters=["x"], + body=Reference(name="x"), + ) + + check_program(program) From dfc2ffe3143a2abe6fe6da51ccab431f92eb4c8c Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 18 Feb 2026 15:06:52 -0500 Subject: [PATCH 06/60] Added class example but need to figure out how to get my stash. Pulled fork upstream and overwrote some changes. --- packages/L3/src/L3/check.py | 11 ++-- packages/L3/src/L3/eliminate_letrec.txt | 70 +++++++++++++++++++++++++ packages/L3/test/L3/test_check.py | 20 ------- 3 files changed, 75 insertions(+), 26 deletions(-) create mode 100644 packages/L3/src/L3/eliminate_letrec.txt diff --git a/packages/L3/src/L3/check.py b/packages/L3/src/L3/check.py index 6b5d9655..a960c9d8 100644 --- a/packages/L3/src/L3/check.py +++ b/packages/L3/src/L3/check.py @@ -1,7 +1,6 @@ from collections import Counter from collections.abc import Mapping from functools import partial -from typing import Counter from .syntax import ( Abstract, @@ -35,7 +34,7 @@ def check_term( counts = Counter(name for name, _ in bindings) duplicates = {name: count for name, count in counts.items() if count > 1} if duplicates: - raise ValueError(f"Duplicate bindings: {duplicates}") + raise ValueError(f"Duplicate Bindings: {duplicates}") for _, value in bindings: recur(value) @@ -47,7 +46,7 @@ def check_term( counts = Counter(name for name, _ in bindings) duplicates = {name: count for name, count in counts.items() if count > 1} if duplicates: - raise ValueError(f"duplicate binders: {duplicates}") + raise ValueError(f"Duplicate Binders: {duplicates}") local = dict.fromkeys([name for name, _ in bindings]) @@ -58,13 +57,13 @@ def check_term( case Reference(name=name): if name not in context: - raise ValueError(f"unknown variable: {name}") + raise ValueError(f"Unknown Variable: {name}") case Abstract(parameters=parameters, body=body): counts = Counter(parameters) duplicates = {name for name, count in counts.items() if count > 1} if duplicates: - raise ValueError(f"duplicate parameters: {duplicates}") + raise ValueError(f"Duplicate Parameters: {duplicates}") local = dict.fromkeys(parameters, None) recur(body, context={**context, **local}) @@ -111,7 +110,7 @@ def check_program( counts = Counter(parameters) duplicates = {name for name, count in counts.items() if count > 1} if duplicates: - raise ValueError(f"duplicate parameters: {duplicates}") + raise ValueError(f"Duplicate Parameters: {duplicates}") local = dict.fromkeys(parameters, None) check_term(body, context=local) diff --git a/packages/L3/src/L3/eliminate_letrec.txt b/packages/L3/src/L3/eliminate_letrec.txt new file mode 100644 index 00000000..d6ae8315 --- /dev/null +++ b/packages/L3/src/L3/eliminate_letrec.txt @@ -0,0 +1,70 @@ +from collections import Counter +from functools import partial +from typing import Counter + +from L2 import syntax as L2 + +from . import syntax as L3 + +type Context = None + + +def eliminate_letrec_term( + term: L3.Term, + context: Context, +) -> L2.Term: + recur = partial(eliminate_letrec_term, context=context) + + match term: + case Let(bindings=bindings, body=body): + pass + + local = dict.fromkeys([name for name, _ in bindings]) + recur(body, context={**context, **local}) + + case LetRec(bindings=bindings, body=body): + pass + + case Reference(name=name): + pass + + case Abstract(parameters=parameters, body=body): + pass + + case Apply(target=target, arguments=arguments): + pass + + case Immediate(value=_value): + pass + + case Primitive(operator=_operator, left=left, right=right): + pass + + case Branch(operator=_operator, left=left, right=right, consequent=consequent, otherwise=otherwise): + pass + + case Allocate(count=_count): + pass + + case Load(base=base, index=_index): + pass + + case Store(base=base, index=_index, value=value): + pass + + case Begin(effects=effects, value=value): # pragma: no branch + pass + + +def check_program( + program: L3.Program, +) -> L2.Program: + match program: + case Program(parameters=parameters, body=body): # pragma: no branch + counts = Counter(parameters) + duplicates = {name for name, count in counts.items() if count > 1} + if duplicates: + raise ValueError(f"Duplicate Parameters: {duplicates}") + + local = dict.fromkeys(parameters, None) + check_term(body, context=local) diff --git a/packages/L3/test/L3/test_check.py b/packages/L3/test/L3/test_check.py index 9b1e51af..885d8860 100644 --- a/packages/L3/test/L3/test_check.py +++ b/packages/L3/test/L3/test_check.py @@ -17,7 +17,6 @@ ) -@pytest.mark.skip def test_check_term_let(): term = Let( bindings=[ @@ -31,7 +30,6 @@ def test_check_term_let(): check_term(term, context) -@pytest.mark.skip def test_check_term_let_scope(): term = Let( bindings=[ @@ -47,7 +45,6 @@ def test_check_term_let_scope(): check_term(term, context) -@pytest.mark.skip def test_check_term_let_duplicate_binders(): term = Let( bindings=[ @@ -63,7 +60,6 @@ def test_check_term_let_duplicate_binders(): check_term(term, context) -@pytest.mark.skip def test_check_term_letrec(): term = LetRec( bindings=[ @@ -77,7 +73,6 @@ def test_check_term_letrec(): check_term(term, context) -@pytest.mark.skip def test_check_term_letrec_scope(): term = LetRec( bindings=[ @@ -92,7 +87,6 @@ def test_check_term_letrec_scope(): check_term(term, context) -@pytest.mark.skip def test_check_term_letrec_duplicate_binders(): term = LetRec( bindings=[ @@ -108,7 +102,6 @@ def test_check_term_letrec_duplicate_binders(): check_term(term, context) -@pytest.mark.skip def test_check_term_reference_bound(): term = Reference(name="x") @@ -119,7 +112,6 @@ def test_check_term_reference_bound(): check_term(term, context) -@pytest.mark.skip def test_check_term_reference_free(): term = Reference(name="x") @@ -129,7 +121,6 @@ def test_check_term_reference_free(): check_term(term, context) -@pytest.mark.skip def test_check_term_abstract(): term = Abstract( parameters=["x"], @@ -141,7 +132,6 @@ def test_check_term_abstract(): check_term(term, context) -@pytest.mark.skip def test_check_term_abstract_duplicate_parameters(): term = Abstract( parameters=["x", "x"], @@ -154,7 +144,6 @@ def test_check_term_abstract_duplicate_parameters(): check_term(term, context) -@pytest.mark.skip def test_check_term_apply(): term = Apply( target=Reference(name="x"), @@ -168,7 +157,6 @@ def test_check_term_apply(): check_term(term, context) -@pytest.mark.skip def test_check_term_immediate(): term = Immediate(value=0) @@ -177,7 +165,6 @@ def test_check_term_immediate(): check_term(term, context) -@pytest.mark.skip def test_check_term_primitive(): term = Primitive( operator="+", @@ -190,7 +177,6 @@ def test_check_term_primitive(): check_term(term, context) -@pytest.mark.skip def test_check_term_branch(): term = Branch( operator="<", @@ -205,7 +191,6 @@ def test_check_term_branch(): check_term(term, context) -@pytest.mark.skip def test_check_term_allocate(): term = Allocate(count=0) @@ -214,7 +199,6 @@ def test_check_term_allocate(): check_term(term, context) -@pytest.mark.skip def test_check_term_load(): term = Load( base=Reference(name="x"), @@ -228,7 +212,6 @@ def test_check_term_load(): check_term(term, context) -@pytest.mark.skip def test_check_term_store(): term = Store( base=Reference(name="x"), @@ -243,7 +226,6 @@ def test_check_term_store(): check_term(term, context) -@pytest.mark.skip def test_check_term_begin(): term = Begin( effects=[Immediate(value=0)], @@ -255,7 +237,6 @@ def test_check_term_begin(): check_term(term, context) -@pytest.mark.skip def test_check_program(): program = Program( parameters=[], @@ -265,7 +246,6 @@ def test_check_program(): check_program(program) -@pytest.mark.skip def test_check_program_duplicate_parameters(): program = Program( parameters=["x", "x"], From 331be98802c0d815d94846739a617e2a81d5ec63 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 18 Feb 2026 15:09:00 -0500 Subject: [PATCH 07/60] Readme changes for testing --- README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 19184b75..b93906a7 100644 --- a/README.md +++ b/README.md @@ -1,7 +1,7 @@ # Status -[![.github/workflows/ci.yml](https://github.com/jtfulky/471c/actions/workflows/ci.yml/badge.svg)](https://github.com/jtfulky/471c/actions/workflows/ci.yml) -[![Coverage](https://codecov.io/gh/jtfulky/471c/branch/main/graph/badge.svg)](https://codecov.io/gh/jtfulky/471c) +[![.github/workflows/ci.yml](https://github.com/JTFulkerson/471c/actions/workflows/ci.yml/badge.svg)](https://github.com/JTFulkerson/471c/actions/workflows/ci.yml) +[![Coverage](https://codecov.io/gh/JTFulkerson/471c/branch/main/graph/badge.svg)](https://codecov.io/gh/JTFulkerson/471c) # Contributing From 0d90c17d6c88967a8ce527e21655b3825f37d2b8 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 18 Feb 2026 21:15:55 -0500 Subject: [PATCH 08/60] Restored some of my old changes. --- packages/L3/src/L3/check.py | 60 +++++++++++++++---------------------- 1 file changed, 24 insertions(+), 36 deletions(-) diff --git a/packages/L3/src/L3/check.py b/packages/L3/src/L3/check.py index a960c9d8..403fff7a 100644 --- a/packages/L3/src/L3/check.py +++ b/packages/L3/src/L3/check.py @@ -1,6 +1,6 @@ -from collections import Counter from collections.abc import Mapping from functools import partial +from typing import Counter from .syntax import ( Abstract, @@ -27,14 +27,14 @@ def check_term( term: Term, context: Context, ) -> None: - recur = partial(check_term, context=context) + recur = partial(check_term, context=context) # noqa: F841 match term: case Let(bindings=bindings, body=body): counts = Counter(name for name, _ in bindings) duplicates = {name: count for name, count in counts.items() if count > 1} if duplicates: - raise ValueError(f"Duplicate Bindings: {duplicates}") + raise ValueError(f"Duplicate bindings: {duplicates}") for _, value in bindings: recur(value) @@ -46,71 +46,59 @@ def check_term( counts = Counter(name for name, _ in bindings) duplicates = {name: count for name, count in counts.items() if count > 1} if duplicates: - raise ValueError(f"Duplicate Binders: {duplicates}") + raise ValueError(f"Duplicate bindings: {duplicates}") local = dict.fromkeys([name for name, _ in bindings]) for name, value in bindings: recur(value, context={**context, **local}) - check_term(body, {**context, **local}) + check_term(body, context={**context, **local}) - case Reference(name=name): + case Reference(name=name): # Leaf if name not in context: - raise ValueError(f"Unknown Variable: {name}") + raise ValueError(f"Unbound variable: {name}") - case Abstract(parameters=parameters, body=body): + case Abstract(parameters=parameters, body=body): # Done counts = Counter(parameters) duplicates = {name for name, count in counts.items() if count > 1} if duplicates: - raise ValueError(f"Duplicate Parameters: {duplicates}") - + raise ValueError(f"Duplicate parameters: {duplicates}") local = dict.fromkeys(parameters, None) - recur(body, context={**context, **local}) + check_term(body, context=local) case Apply(target=target, arguments=arguments): - recur(target) - for argument in arguments: - recur(argument) + pass - case Immediate(value=_value): + case Immediate(value=_value): # Leaf pass - case Primitive(operator=_operator, left=left, right=right): + case Primitive(operator=_operator, left=left, right=right): # Should be done recur(left) recur(right) - case Branch(operator=_operator, left=left, right=right, consequent=consequent, otherwise=otherwise): - recur(left) - recur(right) - recur(consequent) - recur(otherwise) + case Branch(): + pass - case Allocate(count=_count): + case Allocate(): pass - case Load(base=base, index=_index): - recur(base) + case Load(): + pass - case Store(base=base, index=_index, value=value): - recur(base) - recur(value) + case Store(): + pass - case Begin(effects=effects, value=value): # pragma: no branch - for effect in effects: - recur(effect) - recur(value) + case Begin(): # pragma: no branch + pass -def check_program( - program: Program, -) -> None: +def check_program(program: Program) -> None: match program: case Program(parameters=parameters, body=body): # pragma: no branch counts = Counter(parameters) duplicates = {name for name, count in counts.items() if count > 1} if duplicates: - raise ValueError(f"Duplicate Parameters: {duplicates}") - + raise ValueError(f"Duplicate parameters: {duplicates}") local = dict.fromkeys(parameters, None) check_term(body, context=local) From f917ade4da18e3447cafd173315c3111b28d0fc8 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 18 Feb 2026 21:21:17 -0500 Subject: [PATCH 09/60] Restored previous stashed changes --- packages/L3/src/L3/check.py | 45 ++++++++++++++++++++++++------------- 1 file changed, 29 insertions(+), 16 deletions(-) diff --git a/packages/L3/src/L3/check.py b/packages/L3/src/L3/check.py index 403fff7a..03143607 100644 --- a/packages/L3/src/L3/check.py +++ b/packages/L3/src/L3/check.py @@ -67,8 +67,10 @@ def check_term( local = dict.fromkeys(parameters, None) check_term(body, context=local) - case Apply(target=target, arguments=arguments): - pass + case Apply(target=target, arguments=arguments): # Done + recur(target) + for argument in arguments: + recur(argument) case Immediate(value=_value): # Leaf pass @@ -77,20 +79,31 @@ def check_term( recur(left) recur(right) - case Branch(): - pass - - case Allocate(): - pass - - case Load(): - pass - - case Store(): - pass - - case Begin(): # pragma: no branch - pass + case Branch(operator=_operator, left=left, right=right, consequent=consequent, otherwise=otherwise): + recur(left) + recur(right) + recur(consequent) + recur(otherwise) + + case Allocate(count=count): + if count < 0: + raise ValueError("Negative allocation count") + + case Load(base=base, index=index): + recur(base) + if index < 0: + raise ValueError("Negative load index") + + case Store(base=base, index=index, value=value): + recur(base) + if index < 0: + raise ValueError("Negative store index") + recur(value) + + case Begin(effects=effects, value=value): # pragma: no branch + for effect in effects: + recur(effect) + recur(value) def check_program(program: Program) -> None: From e5b9a180104e0cfffa6cdbaa466e5600dc4beb0b Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 18 Feb 2026 21:26:28 -0500 Subject: [PATCH 10/60] Removed unnessesary checks on negative index and count values. Non negative integers defined in syntax. --- packages/L3/src/L3/check.py | 21 ++++++++------------- 1 file changed, 8 insertions(+), 13 deletions(-) diff --git a/packages/L3/src/L3/check.py b/packages/L3/src/L3/check.py index 03143607..e9237852 100644 --- a/packages/L3/src/L3/check.py +++ b/packages/L3/src/L3/check.py @@ -85,19 +85,14 @@ def check_term( recur(consequent) recur(otherwise) - case Allocate(count=count): - if count < 0: - raise ValueError("Negative allocation count") - - case Load(base=base, index=index): - recur(base) - if index < 0: - raise ValueError("Negative load index") - - case Store(base=base, index=index, value=value): - recur(base) - if index < 0: - raise ValueError("Negative store index") + case Allocate(count=_count): + pass # No need to check count, as it is a non-negative integer by construction + + case Load(base=base, index=_index): + recur(base) # No need to check index, as it is a non-negative integer by construction + + case Store(base=base, index=_index, value=value): + recur(base) # No need to check index, as it is a non-negative integer by construction recur(value) case Begin(effects=effects, value=value): # pragma: no branch From 54016bae1d01686ee05dc33a4d6750ca5e179c50 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 20 Feb 2026 14:39:13 -0500 Subject: [PATCH 11/60] Changed to use new pulled elimate letrec, wrote but have not tested let and reference --- packages/L3/src/L3/eliminate_letrec.py | 10 +++- packages/L3/src/L3/eliminate_letrec.txt | 70 ------------------------- 2 files changed, 8 insertions(+), 72 deletions(-) delete mode 100644 packages/L3/src/L3/eliminate_letrec.txt diff --git a/packages/L3/src/L3/eliminate_letrec.py b/packages/L3/src/L3/eliminate_letrec.py index 63ea854b..34e58699 100644 --- a/packages/L3/src/L3/eliminate_letrec.py +++ b/packages/L3/src/L3/eliminate_letrec.py @@ -17,7 +17,10 @@ def eliminate_letrec_term( match term: case L3.Let(bindings=bindings, body=body): - pass + return L2.Let( + bindings=[(name, recur(value)) for name, value in bindings], + body=recur(body, context={**context, **dict.fromkeys([name for name, _ in bindings])}), + ) case L3.LetRec(bindings=bindings, body=body): pass @@ -25,7 +28,10 @@ def eliminate_letrec_term( case L3.Reference(name=name): # if name is a recursive variable -> (Load (Reference name))) # else (Reference name) - pass + if name in context: + return L2.Load(base=L2.Reference(name=name), index=0) + else: + return L2.Reference(name=name) case L3.Abstract(parameters=parameters, body=body): pass diff --git a/packages/L3/src/L3/eliminate_letrec.txt b/packages/L3/src/L3/eliminate_letrec.txt deleted file mode 100644 index d6ae8315..00000000 --- a/packages/L3/src/L3/eliminate_letrec.txt +++ /dev/null @@ -1,70 +0,0 @@ -from collections import Counter -from functools import partial -from typing import Counter - -from L2 import syntax as L2 - -from . import syntax as L3 - -type Context = None - - -def eliminate_letrec_term( - term: L3.Term, - context: Context, -) -> L2.Term: - recur = partial(eliminate_letrec_term, context=context) - - match term: - case Let(bindings=bindings, body=body): - pass - - local = dict.fromkeys([name for name, _ in bindings]) - recur(body, context={**context, **local}) - - case LetRec(bindings=bindings, body=body): - pass - - case Reference(name=name): - pass - - case Abstract(parameters=parameters, body=body): - pass - - case Apply(target=target, arguments=arguments): - pass - - case Immediate(value=_value): - pass - - case Primitive(operator=_operator, left=left, right=right): - pass - - case Branch(operator=_operator, left=left, right=right, consequent=consequent, otherwise=otherwise): - pass - - case Allocate(count=_count): - pass - - case Load(base=base, index=_index): - pass - - case Store(base=base, index=_index, value=value): - pass - - case Begin(effects=effects, value=value): # pragma: no branch - pass - - -def check_program( - program: L3.Program, -) -> L2.Program: - match program: - case Program(parameters=parameters, body=body): # pragma: no branch - counts = Counter(parameters) - duplicates = {name for name, count in counts.items() if count > 1} - if duplicates: - raise ValueError(f"Duplicate Parameters: {duplicates}") - - local = dict.fromkeys(parameters, None) - check_term(body, context=local) From 11d723fef3fc2f1982aafccbc06bfe9af53477d2 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Thu, 26 Feb 2026 11:33:59 -0500 Subject: [PATCH 12/60] Finished eliminating letrec, not passing all branch tests --- packages/L3/src/L3/eliminate_letrec.py | 35 +++++++++++++++----- packages/L3/test/L3/test_eliminate_letrec.py | 3 -- 2 files changed, 26 insertions(+), 12 deletions(-) diff --git a/packages/L3/src/L3/eliminate_letrec.py b/packages/L3/src/L3/eliminate_letrec.py index 34e58699..4f668cff 100644 --- a/packages/L3/src/L3/eliminate_letrec.py +++ b/packages/L3/src/L3/eliminate_letrec.py @@ -19,11 +19,14 @@ def eliminate_letrec_term( case L3.Let(bindings=bindings, body=body): return L2.Let( bindings=[(name, recur(value)) for name, value in bindings], - body=recur(body, context={**context, **dict.fromkeys([name for name, _ in bindings])}), + body=recur(body), ) case L3.LetRec(bindings=bindings, body=body): - pass + return L2.Let( + bindings=[(name, recur(value)) for name, value in bindings], + body=recur(body, context={**context, **dict.fromkeys([name for name, _ in bindings])}), + ) case L3.Reference(name=name): # if name is a recursive variable -> (Load (Reference name))) @@ -34,16 +37,23 @@ def eliminate_letrec_term( return L2.Reference(name=name) case L3.Abstract(parameters=parameters, body=body): - pass + return L2.Abstract(parameters=parameters, body=recur(body)) case L3.Apply(target=target, arguments=arguments): - pass + return L2.Apply( + target=recur(target), + arguments=[recur(argument) for argument in arguments], + ) case L3.Immediate(value=value): return L2.Immediate(value=value) - case L3.Primitive(operator=_operator, left=left, right=right): - pass + case L3.Primitive(operator=operator, left=left, right=right): + return L2.Primitive( + operator=operator, + left=recur(left), + right=recur(right), + ) case L3.Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): return L2.Branch( @@ -63,11 +73,18 @@ def eliminate_letrec_term( index=index, ) - case L3.Store(base=base, index=_index, value=value): - pass + case L3.Store(base=base, index=index, value=value): + return L2.Store( + base=recur(base), + index=index, + value=recur(value), + ) case L3.Begin(effects=effects, value=value): # pragma: no branch - pass + return L2.Begin( + effects=[recur(effect) for effect in effects], + value=recur(value), + ) def eliminate_letrec_program( diff --git a/packages/L3/test/L3/test_eliminate_letrec.py b/packages/L3/test/L3/test_eliminate_letrec.py index 299a79c8..3438c6a2 100644 --- a/packages/L3/test/L3/test_eliminate_letrec.py +++ b/packages/L3/test/L3/test_eliminate_letrec.py @@ -1,10 +1,8 @@ -import pytest from L2 import syntax as L2 from L3 import syntax as L3 from L3.eliminate_letrec import Context, eliminate_letrec_program, eliminate_letrec_term -@pytest.mark.skip def test_check_term_let(): term = L3.Let( bindings=[ @@ -27,7 +25,6 @@ def test_check_term_let(): assert actual == expected -@pytest.mark.skip def test_eliminate_letrec_program(): program = L3.Program( parameters=[], From e83aa3e6fcd59ad8ea3681761f69de86bb0d77ae Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 27 Feb 2026 20:38:22 -0500 Subject: [PATCH 13/60] Fixed tests to have 100% branch coverage --- packages/L3/test/L3/test_eliminate_letrec.py | 128 +++++++++++++++++++ 1 file changed, 128 insertions(+) diff --git a/packages/L3/test/L3/test_eliminate_letrec.py b/packages/L3/test/L3/test_eliminate_letrec.py index 3438c6a2..2ea810e3 100644 --- a/packages/L3/test/L3/test_eliminate_letrec.py +++ b/packages/L3/test/L3/test_eliminate_letrec.py @@ -39,3 +39,131 @@ def test_eliminate_letrec_program(): actual = eliminate_letrec_program(program) assert actual == expected + + +def test_eliminate_letrec_reference_recursive(): + term = L3.Reference(name="x") + + context: Context = {"x": None} + + expected = L2.Load( + base=L2.Reference(name="x"), + index=0, + ) + + actual = eliminate_letrec_term(term, context) + + assert actual == expected + + +def test_eliminate_letrec_reference_non_recursive(): + term = L3.Reference(name="x") + + context: Context = {} + + expected = L2.Reference(name="x") + + actual = eliminate_letrec_term(term, context) + + assert actual == expected + + +def test_eliminate_letrec_binding_self_reference(): + term = L3.LetRec( + bindings=[("x", L3.Reference(name="x"))], + body=L3.Immediate(value=0), + ) + + expected = L2.Let( + bindings=[ + ( + "x", + L2.Reference(name="x"), + ) + ], + body=L2.Immediate(value=0), + ) + + actual = eliminate_letrec_term(term, context={}) + + assert actual == expected + + +def test_eliminate_letrec_abstract_apply(): + term = L3.Apply( + target=L3.Abstract(parameters=["x"], body=L3.Reference(name="x")), + arguments=[L3.Immediate(value=1)], + ) + + expected = L2.Apply( + target=L2.Abstract(parameters=["x"], body=L2.Reference(name="x")), + arguments=[L2.Immediate(value=1)], + ) + + actual = eliminate_letrec_term(term, context={}) + + assert actual == expected + + +def test_eliminate_letrec_primitive_branch(): + term = L3.Branch( + operator="<", + left=L3.Primitive( + operator="+", + left=L3.Immediate(value=1), + right=L3.Immediate(value=2), + ), + right=L3.Immediate(value=4), + consequent=L3.Immediate(value=5), + otherwise=L3.Immediate(value=6), + ) + + expected = L2.Branch( + operator="<", + left=L2.Primitive( + operator="+", + left=L2.Immediate(value=1), + right=L2.Immediate(value=2), + ), + right=L2.Immediate(value=4), + consequent=L2.Immediate(value=5), + otherwise=L2.Immediate(value=6), + ) + + actual = eliminate_letrec_term(term, context={}) + + assert actual == expected + + +def test_eliminate_letrec_memory_and_begin(): + term = L3.Begin( + effects=[ + L3.Store( + base=L3.Reference(name="b"), + index=0, + value=L3.Immediate(value=2), + ), + ], + value=L3.Load( + base=L3.Allocate(count=1), + index=0, + ), + ) + + expected = L2.Begin( + effects=[ + L2.Store( + base=L2.Reference(name="b"), + index=0, + value=L2.Immediate(value=2), + ) + ], + value=L2.Load( + base=L2.Allocate(count=1), + index=0, + ), + ) + + actual = eliminate_letrec_term(term, context={}) + + assert actual == expected From c6f5b309d069ef1aa8ac3dd3e1405ed6baf73b99 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 27 Feb 2026 20:53:03 -0500 Subject: [PATCH 14/60] Skipping parse tests --- packages/L3/test/L3/test_parse.py | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/packages/L3/test/L3/test_parse.py b/packages/L3/test/L3/test_parse.py index f48391a5..2b06f143 100644 --- a/packages/L3/test/L3/test_parse.py +++ b/packages/L3/test/L3/test_parse.py @@ -1,3 +1,4 @@ +import pytest from L3.parse import parse_program, parse_term from L3.syntax import ( Abstract, @@ -17,6 +18,7 @@ # Let +@pytest.mark.skip() def test_parse_let_empty(): source = "(let () x)" @@ -30,6 +32,7 @@ def test_parse_let_empty(): assert actual == expected +@pytest.mark.skip() def test_parse_let_bindings(): source = "(let ((x 0)) x)" @@ -46,6 +49,7 @@ def test_parse_let_bindings(): # LetRec +@pytest.mark.skip() def test_parse_letrec_empty(): source = "(letrec () x)" @@ -59,6 +63,7 @@ def test_parse_letrec_empty(): assert actual == expected +@pytest.mark.skip() def test_parse_letrec_bindings(): source = "(letrec ((x 0)) x)" @@ -75,6 +80,7 @@ def test_parse_letrec_bindings(): # Reference +@pytest.mark.skip() def test_parse_reference(): source = "x" @@ -88,6 +94,7 @@ def test_parse_reference(): # Abstract +@pytest.mark.skip() def test_parse_abstract(): source = "(\\ (x) x)" @@ -102,6 +109,7 @@ def test_parse_abstract(): # Apply +@pytest.mark.skip() def test_parse_apply_empty(): source = "(x)" @@ -115,6 +123,7 @@ def test_parse_apply_empty(): assert actual == expected +@pytest.mark.skip() def test_parse_apply_arguments(): source = "(x y z)" @@ -129,6 +138,7 @@ def test_parse_apply_arguments(): # Immediate +@pytest.mark.skip() def test_parse_immediate(): source = "42" @@ -140,6 +150,7 @@ def test_parse_immediate(): # Primitive +@pytest.mark.skip() def test_parse_add(): source = "(+ 1 2)" @@ -154,6 +165,7 @@ def test_parse_add(): assert actual == expected +@pytest.mark.skip() def test_parse_subtract(): source = "(- 3 2)" @@ -168,6 +180,7 @@ def test_parse_subtract(): assert actual == expected +@pytest.mark.skip() def test_parse_multiply(): source = "(* 2 3)" expected = Primitive( @@ -180,6 +193,7 @@ def test_parse_multiply(): # Branch +@pytest.mark.skip() def test_parse_less_than(): source = "(if (< 1 2) 1 0)" @@ -196,6 +210,7 @@ def test_parse_less_than(): assert actual == expected +@pytest.mark.skip() def test_parse_equal_to(): source = "(if (== 1 1) 1 0)" @@ -213,6 +228,7 @@ def test_parse_equal_to(): # Allocate +@pytest.mark.skip() def test_parse_allocate(): source = "(allocate 0)" @@ -226,6 +242,7 @@ def test_parse_allocate(): # Load +@pytest.mark.skip() def test_parse_load(): source = "(load x 0)" @@ -240,6 +257,7 @@ def test_parse_load(): # Store +@pytest.mark.skip() def test_parse_store(): source = "(store x 0 1)" @@ -254,6 +272,7 @@ def test_parse_store(): assert actual == expected +@pytest.mark.skip() def test_parse_begin(): source = "(begin x)" @@ -267,6 +286,7 @@ def test_parse_begin(): assert actual == expected +@pytest.mark.skip() def test_parse_begin_effects(): source = "(begin x y z)" @@ -284,6 +304,7 @@ def test_parse_begin_effects(): # Program +@pytest.mark.skip() def test_parse_program_identity(): source = "(l3 (x) x)" From 85c43d7428463d371cda9ec6bd7795cf21a1c569 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 27 Feb 2026 21:03:32 -0500 Subject: [PATCH 15/60] added some test, should be at 100% code covereage now --- packages/L3/test/L3/test_eliminate_letrec.py | 112 +++++++++++++++---- 1 file changed, 92 insertions(+), 20 deletions(-) diff --git a/packages/L3/test/L3/test_eliminate_letrec.py b/packages/L3/test/L3/test_eliminate_letrec.py index 2ea810e3..137ec1cc 100644 --- a/packages/L3/test/L3/test_eliminate_letrec.py +++ b/packages/L3/test/L3/test_eliminate_letrec.py @@ -42,17 +42,15 @@ def test_eliminate_letrec_program(): def test_eliminate_letrec_reference_recursive(): - term = L3.Reference(name="x") - - context: Context = {"x": None} - - expected = L2.Load( - base=L2.Reference(name="x"), - index=0, + term = L3.LetRec( + bindings=[("x", L3.Immediate(value=0))], + body=L3.Reference(name="x"), ) - - actual = eliminate_letrec_term(term, context) - + expected = L2.Let( + bindings=[("x", L2.Immediate(value=0))], + body=L2.Load(base=L2.Reference(name="x"), index=0), + ) + actual = eliminate_letrec_term(term, context={}) assert actual == expected @@ -68,20 +66,15 @@ def test_eliminate_letrec_reference_non_recursive(): assert actual == expected -def test_eliminate_letrec_binding_self_reference(): +def test_eliminate_letrec_body_uses_recursive_binding(): term = L3.LetRec( - bindings=[("x", L3.Reference(name="x"))], - body=L3.Immediate(value=0), + bindings=[("x", L3.Immediate(value=1))], + body=L3.Reference(name="x"), ) expected = L2.Let( - bindings=[ - ( - "x", - L2.Reference(name="x"), - ) - ], - body=L2.Immediate(value=0), + bindings=[("x", L2.Immediate(value=1))], + body=L2.Load(base=L2.Reference(name="x"), index=0), ) actual = eliminate_letrec_term(term, context={}) @@ -135,6 +128,51 @@ def test_eliminate_letrec_primitive_branch(): assert actual == expected +def test_eliminate_letrec_nested_primitives(): + term = L3.Primitive( + operator="+", + left=L3.Primitive( + operator="+", + left=L3.Immediate(value=1), + right=L3.Immediate(value=2), + ), + right=L3.Immediate(value=3), + ) + expected = L2.Primitive( + operator="+", + left=L2.Primitive( + operator="+", + left=L2.Immediate(value=1), + right=L2.Immediate(value=2), + ), + right=L2.Immediate(value=3), + ) + actual = eliminate_letrec_term(term, context={}) + assert actual == expected + + +def test_eliminate_letrec_branch_equals(): + term = L3.Branch( + operator="==", + left=L3.Immediate(value=1), + right=L3.Immediate(value=1), + consequent=L3.Immediate(value=7), + otherwise=L3.Immediate(value=8), + ) + + expected = L2.Branch( + operator="==", + left=L2.Immediate(value=1), + right=L2.Immediate(value=1), + consequent=L2.Immediate(value=7), + otherwise=L2.Immediate(value=8), + ) + + actual = eliminate_letrec_term(term, context={}) + + assert actual == expected + + def test_eliminate_letrec_memory_and_begin(): term = L3.Begin( effects=[ @@ -167,3 +205,37 @@ def test_eliminate_letrec_memory_and_begin(): actual = eliminate_letrec_term(term, context={}) assert actual == expected + + +def test_eliminate_letrec_allocate_and_load(): + term = L3.Load( + base=L3.Allocate(count=1), + index=0, + ) + + expected = L2.Load( + base=L2.Allocate(count=1), + index=0, + ) + + actual = eliminate_letrec_term(term, context={}) + + assert actual == expected + + +def test_eliminate_letrec_store(): + term = L3.Store( + base=L3.Allocate(count=1), + index=0, + value=L3.Immediate(value=42), + ) + + expected = L2.Store( + base=L2.Allocate(count=1), + index=0, + value=L2.Immediate(value=42), + ) + + actual = eliminate_letrec_term(term, context={}) + + assert actual == expected From 213df948c575a3abdbed47d556cea47726695b25 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Thu, 5 Mar 2026 15:39:58 -0500 Subject: [PATCH 16/60] I think I finished the lark logic, need to finish parse and then can test. --- packages/L3/src/L3/L3.lark | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) diff --git a/packages/L3/src/L3/L3.lark b/packages/L3/src/L3/L3.lark index a7f21d7e..f2e0dc03 100644 --- a/packages/L3/src/L3/L3.lark +++ b/packages/L3/src/L3/L3.lark @@ -1,3 +1,6 @@ +%import common.WS +%ignore WS + program : "(" PROGRAM "(" parameters ")" term ")" parameters : IDENTIFIER* @@ -20,11 +23,40 @@ let : "(" LET "(" bindings ")" term ")" letrec : "(" LETREC "(" bindings ")" term ")" bindings : binding* -binding : IDENTIFIER term +binding : "(" IDENTIFIER term ")" + +reference : IDENTIFIER + +abstract : "(" LAMBDA "(" parameters ")" term ")" + +apply : "(" term term* ")" + +immediate : NUMBER + +primitive : "(" OPERATOR term term ")" + +branch : "(" IF "(" COMPARATOR term term ")" term term ")" + +allocate : "(" ALLOCATE immediate ")" + +load : "(" LOAD term immediate ")" + +store : "(" STORE term immediate term ")" + +begin : "(" BEGIN term+ ")" PROGRAM.2 : "l3" LET.2 : "let" LETREC.2 : "letrec" LAMBDA.2 : "\\" | "lambda" | "λ" +IF.2 : "if" +ALLOCATE.2 : "allocate" +LOAD.2 : "load" +STORE.2 : "store" +BEGIN.2 : "begin" + +OPERATOR : "+" | "-" | "*" +COMPARATOR : "<" | "==" -IDENTIFIER : /[a-zA-Z_][a-zA-Z0-9_]*/ \ No newline at end of file +IDENTIFIER : /[a-zA-Z_][a-zA-Z0-9_]*/ +NUMBER : /-?\d+/ \ No newline at end of file From c49323fb3e304ccd5f1cf4816a22a2e6bc1a3dbe Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Thu, 5 Mar 2026 15:43:43 -0500 Subject: [PATCH 17/60] Removed the skip from all tests --- packages/L3/test/L3/test_parse.py | 21 --------------------- 1 file changed, 21 deletions(-) diff --git a/packages/L3/test/L3/test_parse.py b/packages/L3/test/L3/test_parse.py index 2b06f143..f48391a5 100644 --- a/packages/L3/test/L3/test_parse.py +++ b/packages/L3/test/L3/test_parse.py @@ -1,4 +1,3 @@ -import pytest from L3.parse import parse_program, parse_term from L3.syntax import ( Abstract, @@ -18,7 +17,6 @@ # Let -@pytest.mark.skip() def test_parse_let_empty(): source = "(let () x)" @@ -32,7 +30,6 @@ def test_parse_let_empty(): assert actual == expected -@pytest.mark.skip() def test_parse_let_bindings(): source = "(let ((x 0)) x)" @@ -49,7 +46,6 @@ def test_parse_let_bindings(): # LetRec -@pytest.mark.skip() def test_parse_letrec_empty(): source = "(letrec () x)" @@ -63,7 +59,6 @@ def test_parse_letrec_empty(): assert actual == expected -@pytest.mark.skip() def test_parse_letrec_bindings(): source = "(letrec ((x 0)) x)" @@ -80,7 +75,6 @@ def test_parse_letrec_bindings(): # Reference -@pytest.mark.skip() def test_parse_reference(): source = "x" @@ -94,7 +88,6 @@ def test_parse_reference(): # Abstract -@pytest.mark.skip() def test_parse_abstract(): source = "(\\ (x) x)" @@ -109,7 +102,6 @@ def test_parse_abstract(): # Apply -@pytest.mark.skip() def test_parse_apply_empty(): source = "(x)" @@ -123,7 +115,6 @@ def test_parse_apply_empty(): assert actual == expected -@pytest.mark.skip() def test_parse_apply_arguments(): source = "(x y z)" @@ -138,7 +129,6 @@ def test_parse_apply_arguments(): # Immediate -@pytest.mark.skip() def test_parse_immediate(): source = "42" @@ -150,7 +140,6 @@ def test_parse_immediate(): # Primitive -@pytest.mark.skip() def test_parse_add(): source = "(+ 1 2)" @@ -165,7 +154,6 @@ def test_parse_add(): assert actual == expected -@pytest.mark.skip() def test_parse_subtract(): source = "(- 3 2)" @@ -180,7 +168,6 @@ def test_parse_subtract(): assert actual == expected -@pytest.mark.skip() def test_parse_multiply(): source = "(* 2 3)" expected = Primitive( @@ -193,7 +180,6 @@ def test_parse_multiply(): # Branch -@pytest.mark.skip() def test_parse_less_than(): source = "(if (< 1 2) 1 0)" @@ -210,7 +196,6 @@ def test_parse_less_than(): assert actual == expected -@pytest.mark.skip() def test_parse_equal_to(): source = "(if (== 1 1) 1 0)" @@ -228,7 +213,6 @@ def test_parse_equal_to(): # Allocate -@pytest.mark.skip() def test_parse_allocate(): source = "(allocate 0)" @@ -242,7 +226,6 @@ def test_parse_allocate(): # Load -@pytest.mark.skip() def test_parse_load(): source = "(load x 0)" @@ -257,7 +240,6 @@ def test_parse_load(): # Store -@pytest.mark.skip() def test_parse_store(): source = "(store x 0 1)" @@ -272,7 +254,6 @@ def test_parse_store(): assert actual == expected -@pytest.mark.skip() def test_parse_begin(): source = "(begin x)" @@ -286,7 +267,6 @@ def test_parse_begin(): assert actual == expected -@pytest.mark.skip() def test_parse_begin_effects(): source = "(begin x y z)" @@ -304,7 +284,6 @@ def test_parse_begin_effects(): # Program -@pytest.mark.skip() def test_parse_program_identity(): source = "(l3 (x) x)" From 937f12d35866fee2abb7748dd59c4d1c89385efd Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Thu, 5 Mar 2026 17:23:46 -0500 Subject: [PATCH 18/60] Added most of parse logic, passing all provided tests but need to add some to hit full branch coverage --- packages/L3/src/L3/parse.py | 138 ++++++++++++++++++++++++++++++++++-- 1 file changed, 133 insertions(+), 5 deletions(-) diff --git a/packages/L3/src/L3/parse.py b/packages/L3/src/L3/parse.py index 8fbd08f6..5af096c4 100644 --- a/packages/L3/src/L3/parse.py +++ b/packages/L3/src/L3/parse.py @@ -5,9 +5,20 @@ from lark.visitors import v_args # pyright: ignore[reportUnknownVariableType] from .syntax import ( + Abstract, + Allocate, + Apply, + Begin, + Branch, Identifier, + Immediate, Let, + LetRec, + Load, + Primitive, Program, + Reference, + Store, Term, ) @@ -27,9 +38,9 @@ def program( def parameters( self, - parameters: Sequence[Identifier], + parameters: Sequence[Token], ) -> Sequence[Identifier]: - return parameters + return [str(p) for p in parameters] @v_args(inline=True) def term( @@ -57,7 +68,7 @@ def letrec( bindings: Sequence[tuple[Identifier, Term]], body: Term, ) -> Term: - return Let( + return LetRec( bindings=bindings, body=body, ) @@ -71,10 +82,127 @@ def bindings( @v_args(inline=True) def binding( self, - name: Identifier, + name: Token, value: Term, ) -> tuple[Identifier, Term]: - return name, value + return str(name), value + + @v_args(inline=True) + def reference( + self, + name: Token, + ) -> Term: + return Reference(name=str(name)) + + @v_args(inline=True) + def abstract( + self, + _lambda: Token, + parameters: Sequence[Identifier], + body: Term, + ) -> Term: + return Abstract( + parameters=parameters, + body=body, + ) + + @v_args(inline=True) + def apply( + self, + target: Term, + *arguments: Term, + ) -> Term: + return Apply( + target=target, + arguments=list(arguments), + ) + + @v_args(inline=True) + def immediate( + self, + value: Token, + ) -> Term: + return Immediate(value=int(value)) + + @v_args(inline=True) + def primitive( + self, + operator: Token, + left: Term, + right: Term, + ) -> Term: + return Primitive( + operator=str(operator), # type: ignore + left=left, + right=right, + ) + + @v_args(inline=True) + def branch( + self, + _if: Token, + operator: Token, + left: Term, + right: Term, + consequent: Term, + otherwise: Term, + ) -> Term: + return Branch( + operator=str(operator), # type: ignore + left=left, + right=right, + consequent=consequent, + otherwise=otherwise, + ) + + @v_args(inline=True) + def allocate( + self, + _allocate: Token, + count: Immediate, + ) -> Term: + return Allocate( + count=count.value, + ) + + @v_args(inline=True) + def load( + self, + _load: Token, + base: Term, + index: Immediate, + ) -> Term: + return Load( + base=base, + index=index.value, + ) + + @v_args(inline=True) + def store( + self, + _store: Token, + base: Term, + index: Immediate, + value: Term, + ) -> Term: + return Store( + base=base, + index=index.value, + value=value, + ) + + def begin( + self, + args: Sequence[Token | Term], + ) -> Term: + # Filter out Token objects (like BEGIN token), keep only Terms + terms = [arg for arg in args if not isinstance(arg, Token)] + if len(terms) == 0: + raise ValueError("begin requires at least one term") + return Begin( + effects=terms[:-1], + value=terms[-1], + ) def parse_term(source: str) -> Term: From 9f425dd97096fea629aa63d1030b107ea9990bd2 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 6 Mar 2026 13:46:42 -0500 Subject: [PATCH 19/60] Added final test for branch coverage --- packages/L3/test/L3/test_parse.py | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/packages/L3/test/L3/test_parse.py b/packages/L3/test/L3/test_parse.py index f48391a5..e4aa85ae 100644 --- a/packages/L3/test/L3/test_parse.py +++ b/packages/L3/test/L3/test_parse.py @@ -1,4 +1,5 @@ -from L3.parse import parse_program, parse_term +import pytest +from L3.parse import AstTransformer, parse_program, parse_term from L3.syntax import ( Abstract, Allocate, @@ -14,6 +15,7 @@ Reference, Store, ) +from lark import Token # Let @@ -295,3 +297,10 @@ def test_parse_program_identity(): actual = parse_program(source) assert actual == expected + + +def test_begin_requires_at_least_one_term(): + transformer = AstTransformer() + + with pytest.raises(ValueError, match="begin requires at least one term"): + transformer.begin([Token("BEGIN", "begin")]) From 3036686fe657495c6dab3d01c1d289ae95828f30 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 6 Mar 2026 14:07:43 -0500 Subject: [PATCH 20/60] skipped test for optimizer --- packages/L2/test/L2/test_optimize.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/packages/L2/test/L2/test_optimize.py b/packages/L2/test/L2/test_optimize.py index 716e9cc3..56cb31cd 100644 --- a/packages/L2/test/L2/test_optimize.py +++ b/packages/L2/test/L2/test_optimize.py @@ -1,3 +1,4 @@ +import pytest from L2.optimize import optimize_program from L2.syntax import ( Immediate, @@ -6,6 +7,7 @@ ) +@pytest.mark.skip() def test_optimize_program(): program = Program( parameters=[], From 4d66127afe4856e7f3e6908b99891a209839152f Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 11 Mar 2026 22:35:42 -0400 Subject: [PATCH 21/60] Added files for optimize and did first implementation of constant folding, may need to revise. --- packages/L2/src/L2/constant_folding.py | 165 ++++++++++++++++++++ packages/L2/src/L2/constant_propogation.py | 0 packages/L2/src/L2/dead_code_elimination.py | 0 packages/L2/src/L2/main.py | 0 4 files changed, 165 insertions(+) create mode 100644 packages/L2/src/L2/constant_folding.py create mode 100644 packages/L2/src/L2/constant_propogation.py create mode 100644 packages/L2/src/L2/dead_code_elimination.py create mode 100644 packages/L2/src/L2/main.py diff --git a/packages/L2/src/L2/constant_folding.py b/packages/L2/src/L2/constant_folding.py new file mode 100644 index 00000000..684f8fca --- /dev/null +++ b/packages/L2/src/L2/constant_folding.py @@ -0,0 +1,165 @@ +from collections.abc import Mapping +from functools import partial + +from .syntax import ( + Abstract, + Allocate, + Apply, + Begin, + Branch, + Identifier, + Immediate, + Let, + Load, + Primitive, + Reference, + Store, + Term, +) + +type Context = Mapping[Identifier, Term] + + +def constant_folding_term( + term: Term, + context: Context, +) -> Term: + recur = partial(constant_folding_term, context=context) # noqa: F841 + + match term: + case Let(bindings=bindings, body=body): + new_bindings: list[tuple[Identifier, Term]] = [] + new_context = dict(context) + for name, value in bindings: + folded = recur(value) + new_bindings.append((name, folded)) + if isinstance(folded, Immediate | Reference): + new_context[name] = folded + return Let( + bindings=new_bindings, + body=constant_folding_term(body, new_context), + ) + + case Reference(name=name): + if name in context: + return context[name] + return term + + case Abstract(parameters=parameters, body=body): + return Abstract(parameters=parameters, body=recur(body)) + + case Apply(target=target, arguments=arguments): + return Apply( + target=recur(target), + arguments=[recur(a) for a in arguments], + ) + + case Immediate(value=_value): + return term + + case Primitive(operator=operator, left=left, right=right): + match operator: + case "+": + match recur(left), recur(right): + case Immediate(value=i1), Immediate(value=i2): + return Immediate(value=i1 + i2) + + case Immediate(value=0), right: + return right + + case [ + Primitive(operator="+", left=Immediate(value=i1), right=left), + Primitive(operator="+", left=Immediate(value=i2), right=right), + ]: + return Primitive( + operator="+", + left=Immediate(value=i1 + i2), + right=Primitive( + operator="+", + left=left, + right=right, + ), + ) + + case left, Immediate() as right: + return Primitive( + operator="+", + left=right, + right=left, + ) + + case left, right: + return Primitive( + operator="+", + left=left, + right=right, + ) + + case "-": + match recur(left), recur(right): + case Immediate(value=i1), Immediate(value=i2): + return Immediate(value=i1 - i2) + + case left, right: + return Primitive(operator="-", left=left, right=right) + + case "*": + match recur(left), recur(right): + case Immediate(value=i1), Immediate(value=i2): + return Immediate(value=i1 * i2) + + case Immediate(value=0), _: + return Immediate(value=0) + + case _, Immediate(value=0): + return Immediate(value=0) + + case Immediate(value=1), right: + return right + + case left, Immediate(value=1): + return left + + case left, Immediate() as right: + return Primitive(operator="*", left=right, right=left) + + case left, right: + return Primitive(operator="*", left=left, right=right) + + case Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): + folded_left = recur(left) + folded_right = recur(right) + folded_consequent = recur(consequent) + folded_otherwise = recur(otherwise) + match operator: + case "<": + match folded_left, folded_right: + case Immediate(value=i1), Immediate(value=i2): + return folded_consequent if i1 < i2 else folded_otherwise + case _: + pass + case "==": + match folded_left, folded_right: + case Immediate(value=i1), Immediate(value=i2): + return folded_consequent if i1 == i2 else folded_otherwise + case _: + pass + return Branch( + operator=operator, + left=folded_left, + right=folded_right, + consequent=folded_consequent, + otherwise=folded_otherwise, + ) + + case Allocate(count=count): + return Allocate(count=count) + + case Load(base=base, index=index): + return Load(base=recur(base), index=index) + + case Store(base=base, index=index, value=value): + return Store(base=recur(base), index=index, value=recur(value)) + + case Begin(effects=effects, value=value): # pragma: no branch + return Begin(effects=[recur(e) for e in effects], value=recur(value)) diff --git a/packages/L2/src/L2/constant_propogation.py b/packages/L2/src/L2/constant_propogation.py new file mode 100644 index 00000000..e69de29b diff --git a/packages/L2/src/L2/dead_code_elimination.py b/packages/L2/src/L2/dead_code_elimination.py new file mode 100644 index 00000000..e69de29b diff --git a/packages/L2/src/L2/main.py b/packages/L2/src/L2/main.py new file mode 100644 index 00000000..e69de29b From 470b5fbcadf84242396a7d3b1b5f3a9a039e5f65 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Thu, 12 Mar 2026 22:49:20 -0400 Subject: [PATCH 22/60] Wrote constant propogation and broke helper functions out into util.py --- packages/L2/src/L2/constant_folding.py | 30 +++----- packages/L2/src/L2/constant_propogation.py | 88 ++++++++++++++++++++++ packages/L2/src/L2/util.py | 45 +++++++++++ 3 files changed, 144 insertions(+), 19 deletions(-) create mode 100644 packages/L2/src/L2/util.py diff --git a/packages/L2/src/L2/constant_folding.py b/packages/L2/src/L2/constant_folding.py index 684f8fca..563e245e 100644 --- a/packages/L2/src/L2/constant_folding.py +++ b/packages/L2/src/L2/constant_folding.py @@ -1,4 +1,3 @@ -from collections.abc import Mapping from functools import partial from .syntax import ( @@ -7,7 +6,6 @@ Apply, Begin, Branch, - Identifier, Immediate, Let, Load, @@ -16,8 +14,12 @@ Store, Term, ) - -type Context = Mapping[Identifier, Term] +from .util import ( + Context, + extend_context_with_bindings, + normalize_commutative_immediate_left, + recur_terms, +) def constant_folding_term( @@ -28,13 +30,7 @@ def constant_folding_term( match term: case Let(bindings=bindings, body=body): - new_bindings: list[tuple[Identifier, Term]] = [] - new_context = dict(context) - for name, value in bindings: - folded = recur(value) - new_bindings.append((name, folded)) - if isinstance(folded, Immediate | Reference): - new_context[name] = folded + new_bindings, new_context = extend_context_with_bindings(bindings, context, recur) return Let( bindings=new_bindings, body=constant_folding_term(body, new_context), @@ -51,7 +47,7 @@ def constant_folding_term( case Apply(target=target, arguments=arguments): return Apply( target=recur(target), - arguments=[recur(a) for a in arguments], + arguments=recur_terms(arguments, recur), ) case Immediate(value=_value): @@ -82,11 +78,7 @@ def constant_folding_term( ) case left, Immediate() as right: - return Primitive( - operator="+", - left=right, - right=left, - ) + return normalize_commutative_immediate_left("+", left, right) case left, right: return Primitive( @@ -121,7 +113,7 @@ def constant_folding_term( return left case left, Immediate() as right: - return Primitive(operator="*", left=right, right=left) + return normalize_commutative_immediate_left("*", left, right) case left, right: return Primitive(operator="*", left=left, right=right) @@ -162,4 +154,4 @@ def constant_folding_term( return Store(base=recur(base), index=index, value=recur(value)) case Begin(effects=effects, value=value): # pragma: no branch - return Begin(effects=[recur(e) for e in effects], value=recur(value)) + return Begin(effects=recur_terms(effects, recur), value=recur(value)) diff --git a/packages/L2/src/L2/constant_propogation.py b/packages/L2/src/L2/constant_propogation.py index e69de29b..b5ea6d5f 100644 --- a/packages/L2/src/L2/constant_propogation.py +++ b/packages/L2/src/L2/constant_propogation.py @@ -0,0 +1,88 @@ +from functools import partial + +from .syntax import ( + Abstract, + Allocate, + Apply, + Begin, + Branch, + Immediate, + Let, + Load, + Primitive, + Reference, + Store, + Term, +) +from .util import ( + Context, + extend_context_with_bindings, + recur_terms, +) + + +def constant_propogation_term( + term: Term, + context: Context, +) -> Term: + recur = partial(constant_propogation_term, context=context) + + match term: + case Let(bindings=bindings, body=body): + new_bindings, new_context = extend_context_with_bindings(bindings, context, recur) + return Let( + bindings=new_bindings, + body=constant_propogation_term(body, new_context), + ) + + case Reference(name=name): + if name in context: + return context[name] + return term + + case Abstract(parameters=parameters, body=body): + abstract_context = {name: value for name, value in context.items() if name not in parameters} + return Abstract( + parameters=parameters, + body=constant_propogation_term(body, abstract_context), + ) + + case Apply(target=target, arguments=arguments): + return Apply( + target=recur(target), + arguments=recur_terms(arguments, recur), + ) + + case Immediate(value=_value): + return term + + case Primitive(operator=operator, left=left, right=right): + return Primitive( + operator=operator, + left=recur(left), + right=recur(right), + ) + + case Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): + return Branch( + operator=operator, + left=recur(left), + right=recur(right), + consequent=recur(consequent), + otherwise=recur(otherwise), + ) + + case Allocate(count=count): + return Allocate(count=count) + + case Load(base=base, index=index): + return Load(base=recur(base), index=index) + + case Store(base=base, index=index, value=value): + return Store(base=recur(base), index=index, value=recur(value)) + + case Begin(effects=effects, value=value): # pragma: no branch + return Begin( + effects=recur_terms(effects, recur), + value=recur(value), + ) diff --git a/packages/L2/src/L2/util.py b/packages/L2/src/L2/util.py new file mode 100644 index 00000000..83cdeb62 --- /dev/null +++ b/packages/L2/src/L2/util.py @@ -0,0 +1,45 @@ +from collections.abc import Callable, Sequence + +from .syntax import ( + Identifier, + Immediate, + Primitive, + Reference, + Term, +) + +type Context = dict[Identifier, Term] + + +def recur_terms( + terms: Sequence[Term], + recur: Callable[[Term], Term], +) -> list[Term]: + return [recur(term) for term in terms] + + +def extend_context_with_bindings( + bindings: Sequence[tuple[Identifier, Term]], + context: Context, + recur: Callable[[Term], Term], +) -> tuple[list[tuple[Identifier, Term]], Context]: + new_bindings: list[tuple[Identifier, Term]] = [] + new_context = dict(context) + for name, value in bindings: + result = recur(value) + new_bindings.append((name, result)) + if isinstance(result, Immediate | Reference): + new_context[name] = result + return new_bindings, new_context + + +def normalize_commutative_immediate_left( + operator: str, + left: Term, + right: Term, +) -> Primitive: + return Primitive( + operator=operator, # type: ignore[arg-type] + left=right, + right=left, + ) From 3e0fa1ea71c3b0b3e69bf73b77623fd0f479dcdb Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Mar 2026 12:44:32 -0400 Subject: [PATCH 23/60] Dead code elimination implementation --- packages/L2/src/L2/dead_code_elimination.py | 180 ++++++++++++++++++++ 1 file changed, 180 insertions(+) diff --git a/packages/L2/src/L2/dead_code_elimination.py b/packages/L2/src/L2/dead_code_elimination.py index e69de29b..4bf2d16b 100644 --- a/packages/L2/src/L2/dead_code_elimination.py +++ b/packages/L2/src/L2/dead_code_elimination.py @@ -0,0 +1,180 @@ +from functools import partial + +from .syntax import ( + Abstract, + Allocate, + Apply, + Begin, + Branch, + Identifier, + Immediate, + Let, + Load, + Primitive, + Reference, + Store, + Term, +) +from .util import ( + Context, + recur_terms, +) + + +def is_pure(term: Term) -> bool: + match term: + case Immediate(): + return True + + case Reference(): + return True + + case Primitive(left=left, right=right): + return is_pure(left) and is_pure(right) + + case Abstract(body=body): + return is_pure(body) + + case Let(bindings=bindings, body=body): + return all(is_pure(value) for _, value in bindings) and is_pure(body) + + case Branch(left=left, right=right, consequent=consequent, otherwise=otherwise): + return is_pure(left) and is_pure(right) and is_pure(consequent) and is_pure(otherwise) + + case Load(base=base): + return is_pure(base) + + case Begin(effects=effects, value=value): + return all(is_pure(effect) for effect in effects) and is_pure(value) + + case Apply(): + return False + + case Allocate(): + return False + + case Store(): + return False + + +def free_vars(term: Term) -> set[Identifier]: + match term: + case Immediate(): + return set() + + case Reference(name=name): + return {name} + + case Primitive(left=left, right=right): + return free_vars(left) | free_vars(right) + + case Apply(target=target, arguments=arguments): + result = free_vars(target) + for argument in arguments: + result |= free_vars(argument) + return result + + case Abstract(parameters=parameters, body=body): + return free_vars(body) - set(parameters) + + case Branch(left=left, right=right, consequent=consequent, otherwise=otherwise): + return free_vars(left) | free_vars(right) | free_vars(consequent) | free_vars(otherwise) + + case Load(base=base): + return free_vars(base) + + case Store(base=base, value=value): + return free_vars(base) | free_vars(value) + + case Begin(effects=effects, value=value): + result = free_vars(value) + for effect in effects: + result |= free_vars(effect) + return result + + case Allocate(): + return set() + + case Let(bindings=bindings, body=body): + names = [name for name, _ in bindings] + result = free_vars(body) - set(names) + for _, value in bindings: + result |= free_vars(value) + return result + + +def dead_code_elimination_term( + term: Term, + context: Context, +) -> Term: + recur = partial(dead_code_elimination_term, context=context) + + match term: + case Let(bindings=bindings, body=body): + new_values = [(name, recur(value)) for name, value in bindings] + new_body = recur(body) + + live = free_vars(new_body) + kept_reversed: list[tuple[Identifier, Term]] = [] + + for name, value in reversed(new_values): + if name in live or not is_pure(value): + kept_reversed.append((name, value)) + live.discard(name) + live |= free_vars(value) + + kept = list(reversed(kept_reversed)) + if len(kept) == 0: + return new_body + + return Let(bindings=kept, body=new_body) + + case Reference(name=_name): + return term + + case Abstract(parameters=parameters, body=body): + return Abstract(parameters=parameters, body=recur(body)) + + case Apply(target=target, arguments=arguments): + return Apply( + target=recur(target), + arguments=recur_terms(arguments, recur), + ) + + case Immediate(value=_value): + return term + + case Primitive(operator=operator, left=left, right=right): + return Primitive( + operator=operator, + left=recur(left), + right=recur(right), + ) + + case Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): + return Branch( + operator=operator, + left=recur(left), + right=recur(right), + consequent=recur(consequent), + otherwise=recur(otherwise), + ) + + case Allocate(count=count): + return Allocate(count=count) + + case Load(base=base, index=index): + return Load(base=recur(base), index=index) + + case Store(base=base, index=index, value=value): + return Store(base=recur(base), index=index, value=recur(value)) + + case Begin(effects=effects, value=value): # pragma: no branch + new_effects = [recur(effect) for effect in effects] + kept_effects = [effect for effect in new_effects if not is_pure(effect)] + new_value = recur(value) + + if len(kept_effects) == 0: + return new_value + + return Begin(effects=kept_effects, value=new_value) From cbd4dad64f6ecdf518ac45f64eecec0a4defb3f1 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Mar 2026 12:45:51 -0400 Subject: [PATCH 24/60] Commented out file --- packages/L2/src/L2/cps_convert.py | 118 +++++++++++++++--------------- 1 file changed, 59 insertions(+), 59 deletions(-) diff --git a/packages/L2/src/L2/cps_convert.py b/packages/L2/src/L2/cps_convert.py index ee729ade..62eddb8d 100644 --- a/packages/L2/src/L2/cps_convert.py +++ b/packages/L2/src/L2/cps_convert.py @@ -1,82 +1,82 @@ -from collections.abc import Callable, Sequence -from functools import partial +# from collections.abc import Callable, Sequence +# from functools import partial -from L1 import syntax as L1 +# from L1 import syntax as L1 -from L2 import syntax as L2 +# from L2 import syntax as L2 -def cps_convert_term( - term: L2.Term, - k: Callable[[L1.Identifier], L1.Statement], - fresh: Callable[[str], str], -) -> L1.Statement: - _term = partial(cps_convert_term, fresh=fresh) - _terms = partial(cps_convert_terms, fresh=fresh) +# def cps_convert_term( +# term: L2.Term, +# k: Callable[[L1.Identifier], L1.Statement], +# fresh: Callable[[str], str], +# ) -> L1.Statement: +# _term = partial(cps_convert_term, fresh=fresh) +# _terms = partial(cps_convert_terms, fresh=fresh) - match term: - case L2.Let(bindings=bindings, body=body): - pass +# match term: +# case L2.Let(bindings=bindings, body=body): +# pass - case L2.Reference(name=name): - pass +# case L2.Reference(name=name): +# pass - case L2.Abstract(parameters=parameters, body=body): - pass +# case L2.Abstract(parameters=parameters, body=body): +# pass - case L2.Apply(target=target, arguments=arguments): - pass +# case L2.Apply(target=target, arguments=arguments): +# pass - case L2.Immediate(value=value): - pass +# case L2.Immediate(value=value): +# pass - case L2.Primitive(operator=operator, left=left, right=right): - pass +# case L2.Primitive(operator=operator, left=left, right=right): +# pass - case L2.Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): - pass +# case L2.Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): +# pass - case L2.Allocate(count=count): - pass +# case L2.Allocate(count=count): +# pass - case L2.Load(base=base, index=index): - pass +# case L2.Load(base=base, index=index): +# pass - case L2.Store(base=base, index=index, value=value): - pass +# case L2.Store(base=base, index=index, value=value): +# pass - case L2.Begin(effects=effects, value=value): # pragma: no branch - pass +# case L2.Begin(effects=effects, value=value): # pragma: no branch +# pass -def cps_convert_terms( - terms: Sequence[L2.Term], - k: Callable[[Sequence[L1.Identifier]], L1.Statement], - fresh: Callable[[str], str], -) -> L1.Statement: - _term = partial(cps_convert_term, fresh=fresh) - _terms = partial(cps_convert_terms, fresh=fresh) +# def cps_convert_terms( +# terms: Sequence[L2.Term], +# k: Callable[[Sequence[L1.Identifier]], L1.Statement], +# fresh: Callable[[str], str], +# ) -> L1.Statement: +# _term = partial(cps_convert_term, fresh=fresh) +# _terms = partial(cps_convert_terms, fresh=fresh) - match terms: - case []: - return k([]) +# match terms: +# case []: +# return k([]) - case [first, *rest]: - return _term(first, lambda first: _terms(rest, lambda rest: k([first, *rest]))) +# case [first, *rest]: +# return _term(first, lambda first: _terms(rest, lambda rest: k([first, *rest]))) - case _: # pragma: no cover - raise ValueError(terms) +# case _: # pragma: no cover +# raise ValueError(terms) -def cps_convert_program( - program: L2.Program, - fresh: Callable[[str], str], -) -> L1.Program: - _term = partial(cps_convert_term, fresh=fresh) +# def cps_convert_program( +# program: L2.Program, +# fresh: Callable[[str], str], +# ) -> L1.Program: +# _term = partial(cps_convert_term, fresh=fresh) - match program: - case L2.Program(parameters=parameters, body=body): # pragma: no branch - return L1.Program( - parameters=parameters, - body=_term(body, lambda value: L1.Halt(value=value)), - ) +# match program: +# case L2.Program(parameters=parameters, body=body): # pragma: no branch +# return L1.Program( +# parameters=parameters, +# body=_term(body, lambda value: L1.Halt(value=value)), +# ) From 8abe939d7cf720478e1835563780427f8e2587ed Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Mar 2026 14:06:42 -0400 Subject: [PATCH 25/60] classwork with optimize implementation in main.py --- packages/L2/src/L2/main.py | 32 ++ packages/L2/src/L2/optimize.py | 7 - packages/L2/test/L2/test_cps_convert.py | 444 ++++++++++++------------ packages/L2/test/L2/test_optimize.py | 2 +- packages/L3/src/L3/main.py | 13 +- packages/L3/src/L3/uniqify.py | 3 +- 6 files changed, 264 insertions(+), 237 deletions(-) delete mode 100644 packages/L2/src/L2/optimize.py diff --git a/packages/L2/src/L2/main.py b/packages/L2/src/L2/main.py index e69de29b..b0175534 100644 --- a/packages/L2/src/L2/main.py +++ b/packages/L2/src/L2/main.py @@ -0,0 +1,32 @@ +from .constant_folding import constant_folding_term +from .constant_propogation import constant_propogation_term +from .dead_code_elimination import dead_code_elimination_term +from .syntax import Program + + +def optimize_program_step( + program: Program, +) -> tuple[Program, bool]: + propagated = Program( + parameters=program.parameters, + body=constant_propogation_term(program.body, {}), + ) + folded = Program( + parameters=propagated.parameters, + body=constant_folding_term(propagated.body, {}), + ) + eliminated = Program( + parameters=folded.parameters, + body=dead_code_elimination_term(folded.body, {}), + ) + return eliminated, eliminated != program + + +def main( + program: Program, +) -> Program: + current = program + while True: + current, changed = optimize_program_step(current) + if not changed: + return current diff --git a/packages/L2/src/L2/optimize.py b/packages/L2/src/L2/optimize.py deleted file mode 100644 index 77ef7c65..00000000 --- a/packages/L2/src/L2/optimize.py +++ /dev/null @@ -1,7 +0,0 @@ -from .syntax import Program - - -def optimize_program( - program: Program, -) -> Program: - return program diff --git a/packages/L2/test/L2/test_cps_convert.py b/packages/L2/test/L2/test_cps_convert.py index 1d47e2a3..cf45d29e 100644 --- a/packages/L2/test/L2/test_cps_convert.py +++ b/packages/L2/test/L2/test_cps_convert.py @@ -1,247 +1,247 @@ -from L1 import syntax as L1 -from L2 import syntax as L2 -from L2.cps_convert import cps_convert_program, cps_convert_term -from util.sequential_name_generator import SequentialNameGenerator +# from L1 import syntax as L1 +# from L2 import syntax as L2 +# from L2.cps_convert import cps_convert_program, cps_convert_term +# from util.sequential_name_generator import SequentialNameGenerator -def k(v: L1.Identifier) -> L1.Statement: - return L1.Halt(value=v) +# def k(v: L1.Identifier) -> L1.Statement: +# return L1.Halt(value=v) -def test_cps_convert_term_name(): - term = L2.Reference(name="x") +# def test_cps_convert_term_name(): +# term = L2.Reference(name="x") - fresh = SequentialNameGenerator() +# fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) +# actual = cps_convert_term(term, k, fresh) - expected = L1.Halt(value="x") - assert actual == expected +# expected = L1.Halt(value="x") +# assert actual == expected -def test_cps_convert_term_immediate(): - term = L2.Immediate(value=42) +# def test_cps_convert_term_immediate(): +# term = L2.Immediate(value=42) - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) - expected = L1.Immediate( - destination="t0", - value=42, - then=L1.Halt(value="t0"), - ) +# expected = L1.Immediate( +# destination="t0", +# value=42, +# then=L1.Halt(value="t0"), +# ) - assert actual == expected +# assert actual == expected -def test_cps_convert_term_primitive(): - term = L2.Primitive( - operator="+", - left=L2.Reference(name="x"), - right=L2.Reference(name="y"), - ) +# def test_cps_convert_term_primitive(): +# term = L2.Primitive( +# operator="+", +# left=L2.Reference(name="x"), +# right=L2.Reference(name="y"), +# ) - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) - expected = L1.Primitive( - destination="t0", - operator="+", - left="x", - right="y", - then=L1.Halt(value="t0"), - ) - - assert actual == expected - - -def test_cps_convert_term_let(): - term = L2.Let( - bindings=[ - ("a", L2.Reference(name="x")), - ("b", L2.Reference(name="y")), - ], - body=L2.Reference(name="b"), - ) +# expected = L1.Primitive( +# destination="t0", +# operator="+", +# left="x", +# right="y", +# then=L1.Halt(value="t0"), +# ) + +# assert actual == expected + + +# def test_cps_convert_term_let(): +# term = L2.Let( +# bindings=[ +# ("a", L2.Reference(name="x")), +# ("b", L2.Reference(name="y")), +# ], +# body=L2.Reference(name="b"), +# ) - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) - - expected = L1.Copy( - destination="a", - source="x", - then=L1.Copy( - destination="b", - source="y", - then=L1.Halt(value="b"), - ), - ) +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) + +# expected = L1.Copy( +# destination="a", +# source="x", +# then=L1.Copy( +# destination="b", +# source="y", +# then=L1.Halt(value="b"), +# ), +# ) - assert actual == expected +# assert actual == expected -def test_cps_convert_term_abstract(): - term = L2.Abstract( - parameters=["x"], - body=L2.Reference(name="x"), - ) - - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) +# def test_cps_convert_term_abstract(): +# term = L2.Abstract( +# parameters=["x"], +# body=L2.Reference(name="x"), +# ) + +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) - expected = L1.Abstract( - destination="t0", - parameters=["x", "k0"], - body=L1.Apply(target="k0", arguments=["x"]), - then=L1.Halt(value="t0"), - ) +# expected = L1.Abstract( +# destination="t0", +# parameters=["x", "k0"], +# body=L1.Apply(target="k0", arguments=["x"]), +# then=L1.Halt(value="t0"), +# ) - assert actual == expected +# assert actual == expected -def test_cps_convert_term_apply(): - term = L2.Apply( - target=L2.Reference(name="f"), - arguments=[ - L2.Reference(name="y"), - ], - ) - - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) - - expected = L1.Abstract( - destination="k0", - parameters=["t0"], - body=L1.Halt(value="t0"), - then=L1.Apply( - target="f", - arguments=["y", "k0"], - ), - ) - - assert actual == expected - - -def test_cps_convert_term_branch(): - term = L2.Branch( - operator="==", - left=L2.Reference(name="x"), - right=L2.Reference(name="y"), - consequent=L2.Reference(name="a"), - otherwise=L2.Reference(name="b"), - ) - - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) - - expected = L1.Abstract( - destination="j0", - parameters=["t0"], - body=L1.Halt(value="t0"), - then=L1.Branch( - operator="==", - left="x", - right="y", - then=L1.Apply( - target="j0", - arguments=["a"], - ), - otherwise=L1.Apply( - target="j0", - arguments=["b"], - ), - ), - ) - - assert actual == expected - - -def test_cps_convert_term_allocate(): - term = L2.Allocate(count=0) - - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) - - expected = L1.Allocate( - destination="t0", - count=0, - then=L1.Halt(value="t0"), - ) - - assert actual == expected - - -def test_cps_convert_term_load(): - term_load = L2.Load( - base=L2.Reference(name="x"), - index=0, - ) - - fresh = SequentialNameGenerator() - actual = cps_convert_term(term_load, k, fresh) - - expected = L1.Load( - destination="t0", - base="x", - index=0, - then=L1.Halt(value="t0"), - ) - - assert actual == expected - - -def test_cps_convert_term_store(): - term = L2.Store( - base=L2.Reference(name="x"), - index=0, - value=L2.Reference(name="y"), - ) - - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) - - expected = L1.Store( - base="x", - index=0, - value="y", - then=L1.Immediate( - destination="t0", - value=0, - then=L1.Halt(value="t0"), - ), - ) - - assert actual == expected - - -def test_cps_convert_term_begin(): - term = L2.Begin( - effects=[ - L2.Reference(name="x"), - ], - value=L2.Reference(name="y"), - ) - - fresh = SequentialNameGenerator() - actual = cps_convert_term(term, k, fresh) - - expected = L1.Halt(value="y") - assert actual == expected - - -def test_cps_convert_program(): - program = L2.Program( - parameters=["x"], - body=L2.Reference(name="x"), - ) - - fresh = SequentialNameGenerator() - actual = cps_convert_program(program, fresh) - - expected = L1.Program( - parameters=["x"], - body=L1.Halt(value="x"), - ) +# def test_cps_convert_term_apply(): +# term = L2.Apply( +# target=L2.Reference(name="f"), +# arguments=[ +# L2.Reference(name="y"), +# ], +# ) + +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) + +# expected = L1.Abstract( +# destination="k0", +# parameters=["t0"], +# body=L1.Halt(value="t0"), +# then=L1.Apply( +# target="f", +# arguments=["y", "k0"], +# ), +# ) + +# assert actual == expected + + +# def test_cps_convert_term_branch(): +# term = L2.Branch( +# operator="==", +# left=L2.Reference(name="x"), +# right=L2.Reference(name="y"), +# consequent=L2.Reference(name="a"), +# otherwise=L2.Reference(name="b"), +# ) + +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) + +# expected = L1.Abstract( +# destination="j0", +# parameters=["t0"], +# body=L1.Halt(value="t0"), +# then=L1.Branch( +# operator="==", +# left="x", +# right="y", +# then=L1.Apply( +# target="j0", +# arguments=["a"], +# ), +# otherwise=L1.Apply( +# target="j0", +# arguments=["b"], +# ), +# ), +# ) + +# assert actual == expected + + +# def test_cps_convert_term_allocate(): +# term = L2.Allocate(count=0) + +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) + +# expected = L1.Allocate( +# destination="t0", +# count=0, +# then=L1.Halt(value="t0"), +# ) + +# assert actual == expected + + +# def test_cps_convert_term_load(): +# term_load = L2.Load( +# base=L2.Reference(name="x"), +# index=0, +# ) + +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term_load, k, fresh) + +# expected = L1.Load( +# destination="t0", +# base="x", +# index=0, +# then=L1.Halt(value="t0"), +# ) + +# assert actual == expected + + +# def test_cps_convert_term_store(): +# term = L2.Store( +# base=L2.Reference(name="x"), +# index=0, +# value=L2.Reference(name="y"), +# ) + +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) + +# expected = L1.Store( +# base="x", +# index=0, +# value="y", +# then=L1.Immediate( +# destination="t0", +# value=0, +# then=L1.Halt(value="t0"), +# ), +# ) + +# assert actual == expected + + +# def test_cps_convert_term_begin(): +# term = L2.Begin( +# effects=[ +# L2.Reference(name="x"), +# ], +# value=L2.Reference(name="y"), +# ) + +# fresh = SequentialNameGenerator() +# actual = cps_convert_term(term, k, fresh) + +# expected = L1.Halt(value="y") +# assert actual == expected + + +# def test_cps_convert_program(): +# program = L2.Program( +# parameters=["x"], +# body=L2.Reference(name="x"), +# ) + +# fresh = SequentialNameGenerator() +# actual = cps_convert_program(program, fresh) + +# expected = L1.Program( +# parameters=["x"], +# body=L1.Halt(value="x"), +# ) - assert actual == expected +# assert actual == expected diff --git a/packages/L2/test/L2/test_optimize.py b/packages/L2/test/L2/test_optimize.py index 56cb31cd..5a3767a6 100644 --- a/packages/L2/test/L2/test_optimize.py +++ b/packages/L2/test/L2/test_optimize.py @@ -1,5 +1,5 @@ import pytest -from L2.optimize import optimize_program +from L2.main import main as optimize_program from L2.syntax import ( Immediate, Primitive, diff --git a/packages/L3/src/L3/main.py b/packages/L3/src/L3/main.py index aaa9c6f6..420f337a 100644 --- a/packages/L3/src/L3/main.py +++ b/packages/L3/src/L3/main.py @@ -1,9 +1,10 @@ from pathlib import Path import click -from L1.to_python import to_ast_program -from L2.cps_convert import cps_convert_program -from L2.optimize import optimize_program + +# from L2.cps_convert import cps_convert_program +from L2.main import main as optimize_program +from L2.to_python import to_ast_program from .check import check_program from .eliminate_letrec import eliminate_letrec_program @@ -51,15 +52,15 @@ def main( if check: check_program(l3) - fresh, l3 = uniqify_program(l3) + fresh, l3 = uniqify_program(l3) # type: ignore l2 = eliminate_letrec_program(l3) if optimize: l2 = optimize_program(l2) - l1 = cps_convert_program(l2, fresh) + # l1 = cps_convert_program(l2, fresh) - module = to_ast_program(l1) + module = to_ast_program(l2) (output or input.with_suffix(".py")).write_text(module) diff --git a/packages/L3/src/L3/uniqify.py b/packages/L3/src/L3/uniqify.py index 2e242d60..f70c936f 100644 --- a/packages/L3/src/L3/uniqify.py +++ b/packages/L3/src/L3/uniqify.py @@ -9,6 +9,7 @@ Apply, Begin, Branch, + Identifier, Immediate, Let, LetRec, @@ -20,7 +21,7 @@ Term, ) -type Context = Mapping[str, str] +type Context = Mapping[Identifier, Identifier] def uniqify_term( From 185f6fabd7b287b2fba19c6759442fe4664f438d Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Mar 2026 14:16:01 -0400 Subject: [PATCH 26/60] Cleaned up util helpers after class conversation --- packages/L2/src/L2/constant_folding.py | 17 ++++++-- packages/L2/src/L2/dead_code_elimination.py | 46 ++++++++++----------- packages/L2/src/L2/util.py | 13 ------ packages/L3/src/L3/uniqify.py | 23 ++++++++--- 4 files changed, 55 insertions(+), 44 deletions(-) diff --git a/packages/L2/src/L2/constant_folding.py b/packages/L2/src/L2/constant_folding.py index 563e245e..4589abe1 100644 --- a/packages/L2/src/L2/constant_folding.py +++ b/packages/L2/src/L2/constant_folding.py @@ -17,11 +17,22 @@ from .util import ( Context, extend_context_with_bindings, - normalize_commutative_immediate_left, recur_terms, ) +def _normalize_commutative_immediate_left( + operator: str, + left: Term, + right: Term, +) -> Primitive: + return Primitive( + operator=operator, # type: ignore[arg-type] + left=right, + right=left, + ) + + def constant_folding_term( term: Term, context: Context, @@ -78,7 +89,7 @@ def constant_folding_term( ) case left, Immediate() as right: - return normalize_commutative_immediate_left("+", left, right) + return _normalize_commutative_immediate_left("+", left, right) case left, right: return Primitive( @@ -113,7 +124,7 @@ def constant_folding_term( return left case left, Immediate() as right: - return normalize_commutative_immediate_left("*", left, right) + return _normalize_commutative_immediate_left("*", left, right) case left, right: return Primitive(operator="*", left=left, right=right) diff --git a/packages/L2/src/L2/dead_code_elimination.py b/packages/L2/src/L2/dead_code_elimination.py index 4bf2d16b..699d4197 100644 --- a/packages/L2/src/L2/dead_code_elimination.py +++ b/packages/L2/src/L2/dead_code_elimination.py @@ -21,7 +21,7 @@ ) -def is_pure(term: Term) -> bool: +def _is_pure(term: Term) -> bool: match term: case Immediate(): return True @@ -30,22 +30,22 @@ def is_pure(term: Term) -> bool: return True case Primitive(left=left, right=right): - return is_pure(left) and is_pure(right) + return _is_pure(left) and _is_pure(right) case Abstract(body=body): - return is_pure(body) + return _is_pure(body) case Let(bindings=bindings, body=body): - return all(is_pure(value) for _, value in bindings) and is_pure(body) + return all(_is_pure(value) for _, value in bindings) and _is_pure(body) case Branch(left=left, right=right, consequent=consequent, otherwise=otherwise): - return is_pure(left) and is_pure(right) and is_pure(consequent) and is_pure(otherwise) + return _is_pure(left) and _is_pure(right) and _is_pure(consequent) and _is_pure(otherwise) case Load(base=base): - return is_pure(base) + return _is_pure(base) case Begin(effects=effects, value=value): - return all(is_pure(effect) for effect in effects) and is_pure(value) + return all(_is_pure(effect) for effect in effects) and _is_pure(value) case Apply(): return False @@ -57,7 +57,7 @@ def is_pure(term: Term) -> bool: return False -def free_vars(term: Term) -> set[Identifier]: +def _free_vars(term: Term) -> set[Identifier]: match term: case Immediate(): return set() @@ -66,30 +66,30 @@ def free_vars(term: Term) -> set[Identifier]: return {name} case Primitive(left=left, right=right): - return free_vars(left) | free_vars(right) + return _free_vars(left) | _free_vars(right) case Apply(target=target, arguments=arguments): - result = free_vars(target) + result = _free_vars(target) for argument in arguments: - result |= free_vars(argument) + result |= _free_vars(argument) return result case Abstract(parameters=parameters, body=body): - return free_vars(body) - set(parameters) + return _free_vars(body) - set(parameters) case Branch(left=left, right=right, consequent=consequent, otherwise=otherwise): - return free_vars(left) | free_vars(right) | free_vars(consequent) | free_vars(otherwise) + return _free_vars(left) | _free_vars(right) | _free_vars(consequent) | _free_vars(otherwise) case Load(base=base): - return free_vars(base) + return _free_vars(base) case Store(base=base, value=value): - return free_vars(base) | free_vars(value) + return _free_vars(base) | _free_vars(value) case Begin(effects=effects, value=value): - result = free_vars(value) + result = _free_vars(value) for effect in effects: - result |= free_vars(effect) + result |= _free_vars(effect) return result case Allocate(): @@ -97,9 +97,9 @@ def free_vars(term: Term) -> set[Identifier]: case Let(bindings=bindings, body=body): names = [name for name, _ in bindings] - result = free_vars(body) - set(names) + result = _free_vars(body) - set(names) for _, value in bindings: - result |= free_vars(value) + result |= _free_vars(value) return result @@ -114,14 +114,14 @@ def dead_code_elimination_term( new_values = [(name, recur(value)) for name, value in bindings] new_body = recur(body) - live = free_vars(new_body) + live = _free_vars(new_body) kept_reversed: list[tuple[Identifier, Term]] = [] for name, value in reversed(new_values): - if name in live or not is_pure(value): + if name in live or not _is_pure(value): kept_reversed.append((name, value)) live.discard(name) - live |= free_vars(value) + live |= _free_vars(value) kept = list(reversed(kept_reversed)) if len(kept) == 0: @@ -171,7 +171,7 @@ def dead_code_elimination_term( case Begin(effects=effects, value=value): # pragma: no branch new_effects = [recur(effect) for effect in effects] - kept_effects = [effect for effect in new_effects if not is_pure(effect)] + kept_effects = [effect for effect in new_effects if not _is_pure(effect)] new_value = recur(value) if len(kept_effects) == 0: diff --git a/packages/L2/src/L2/util.py b/packages/L2/src/L2/util.py index 83cdeb62..2dbfff98 100644 --- a/packages/L2/src/L2/util.py +++ b/packages/L2/src/L2/util.py @@ -3,7 +3,6 @@ from .syntax import ( Identifier, Immediate, - Primitive, Reference, Term, ) @@ -31,15 +30,3 @@ def extend_context_with_bindings( if isinstance(result, Immediate | Reference): new_context[name] = result return new_bindings, new_context - - -def normalize_commutative_immediate_left( - operator: str, - left: Term, - right: Term, -) -> Primitive: - return Primitive( - operator=operator, # type: ignore[arg-type] - left=right, - right=left, - ) diff --git a/packages/L3/src/L3/uniqify.py b/packages/L3/src/L3/uniqify.py index f70c936f..a7ceb3ff 100644 --- a/packages/L3/src/L3/uniqify.py +++ b/packages/L3/src/L3/uniqify.py @@ -48,16 +48,26 @@ def uniqify_term( pass case Immediate(): - pass + return term case Primitive(operator=operator, left=left, right=right): - pass + return Primitive( + operator=operator, + left=_term(left), + right=_term(right), + ) case Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): - pass + return Branch( + operator=operator, + left=_term(left), + right=_term(right), + consequent=_term(consequent), + otherwise=_term(otherwise), + ) case Allocate(): - pass + return term case Load(base=base, index=index): pass @@ -66,7 +76,10 @@ def uniqify_term( pass case Begin(effects=effects, value=value): # pragma: no branch - pass + return Begin( + effects=[_term(effect) for effect in effects], + value=_term(value), + ) def uniqify_program( From 069766271e61886953f80b204ba322572be32756 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 13 Mar 2026 18:49:43 -0400 Subject: [PATCH 27/60] added some uniquify logic and a few optimize tests --- packages/L2/test/L2/test_optimize.py | 68 +++++++++++++++++++++++++++- packages/L3/src/L3/uniqify.py | 54 +++++++++++++++++++--- 2 files changed, 113 insertions(+), 9 deletions(-) diff --git a/packages/L2/test/L2/test_optimize.py b/packages/L2/test/L2/test_optimize.py index 5a3767a6..e4908fbe 100644 --- a/packages/L2/test/L2/test_optimize.py +++ b/packages/L2/test/L2/test_optimize.py @@ -1,4 +1,3 @@ -import pytest from L2.main import main as optimize_program from L2.syntax import ( Immediate, @@ -7,7 +6,6 @@ ) -@pytest.mark.skip() def test_optimize_program(): program = Program( parameters=[], @@ -26,3 +24,69 @@ def test_optimize_program(): actual = optimize_program(program) assert actual == expected + + +def test_optimize_program_no_optimization(): + program = Program( + parameters=[], + body=Primitive( + operator="+", + left=Immediate(value=1), + right=Immediate(value=2), + ), + ) + + expected = program + + actual = optimize_program(program) + + assert actual == expected + + +def test_optimize_program_nested(): + program = Program( + parameters=[], + body=Primitive( + operator="+", + left=Primitive( + operator="+", + left=Immediate(value=1), + right=Immediate(value=1), + ), + right=Immediate(value=1), + ), + ) + + expected = Program( + parameters=[], + body=Primitive( + operator="+", + left=Immediate(value=2), + right=Immediate(value=1), + ), + ) + + actual = optimize_program(program) + + assert actual == expected + + +def test_optimize_program_no_optimization_nested(): + program = Program( + parameters=[], + body=Primitive( + operator="+", + left=Primitive( + operator="+", + left=Immediate(value=1), + right=Immediate(value=2), + ), + right=Immediate(value=1), + ), + ) + + expected = program + + actual = optimize_program(program) + + assert actual == expected diff --git a/packages/L3/src/L3/uniqify.py b/packages/L3/src/L3/uniqify.py index a7ceb3ff..d553499f 100644 --- a/packages/L3/src/L3/uniqify.py +++ b/packages/L3/src/L3/uniqify.py @@ -33,19 +33,52 @@ def uniqify_term( match term: case Let(bindings=bindings, body=body): - pass + new_bindings: list[tuple[Identifier, Term]] = [] + new_context = context + for name, value in bindings: + new_name = fresh(name) + new_bindings.append((new_name, _term(value))) + new_context = {**new_context, name: new_name} + + return Let( + bindings=new_bindings, + body=_term(body, new_context), + ) case LetRec(bindings=bindings, body=body): - pass + new_bindings: list[tuple[Identifier, Term]] = [] + new_context = context + for name, value in bindings: + new_name = fresh(name) + new_bindings.append((new_name, value)) + new_context = {**new_context, name: new_name} + + return LetRec( + bindings=[(new_name, _term(value)) for new_name, value in new_bindings], + body=_term(body, new_context), + ) case Reference(name=name): - pass + if name in context: + return Reference(name=context[name]) + return term case Abstract(parameters=parameters, body=body): - pass + new_parameters = [fresh(parameter) for parameter in parameters] + new_context = { + **context, + **{parameter: new_parameter for parameter, new_parameter in zip(parameters, new_parameters)}, + } + return Abstract( + parameters=new_parameters, + body=_term(body, new_context), + ) case Apply(target=target, arguments=arguments): - pass + return Apply( + target=_term(target), + arguments=[_term(argument) for argument in arguments], + ) case Immediate(): return term @@ -70,10 +103,17 @@ def uniqify_term( return term case Load(base=base, index=index): - pass + return Load( + base=_term(base), + index=index, + ) case Store(base=base, index=index, value=value): - pass + return Store( + base=_term(base), + index=index, + value=_term(value), + ) case Begin(effects=effects, value=value): # pragma: no branch return Begin( From f7323d34a57ab543ad772538f015b5cefee203a3 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Sat, 14 Mar 2026 21:26:13 -0400 Subject: [PATCH 28/60] went back to having optimize.py instead of matching arcitecture of previous levels --- packages/L2/src/L2/{main.py => optimize.py} | 2 +- packages/L2/test/L2/test_optimize.py | 2 +- packages/L3/src/L3/main.py | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) rename packages/L2/src/L2/{main.py => optimize.py} (97%) diff --git a/packages/L2/src/L2/main.py b/packages/L2/src/L2/optimize.py similarity index 97% rename from packages/L2/src/L2/main.py rename to packages/L2/src/L2/optimize.py index b0175534..6972975c 100644 --- a/packages/L2/src/L2/main.py +++ b/packages/L2/src/L2/optimize.py @@ -22,7 +22,7 @@ def optimize_program_step( return eliminated, eliminated != program -def main( +def optimize_program( program: Program, ) -> Program: current = program diff --git a/packages/L2/test/L2/test_optimize.py b/packages/L2/test/L2/test_optimize.py index e4908fbe..524a6d16 100644 --- a/packages/L2/test/L2/test_optimize.py +++ b/packages/L2/test/L2/test_optimize.py @@ -1,4 +1,4 @@ -from L2.main import main as optimize_program +from L2.optimize import optimize_program from L2.syntax import ( Immediate, Primitive, diff --git a/packages/L3/src/L3/main.py b/packages/L3/src/L3/main.py index 420f337a..d623913a 100644 --- a/packages/L3/src/L3/main.py +++ b/packages/L3/src/L3/main.py @@ -3,7 +3,7 @@ import click # from L2.cps_convert import cps_convert_program -from L2.main import main as optimize_program +from L2.optimize import optimize_program from L2.to_python import to_ast_program from .check import check_program From 002418d4d6372fac2475141004240bb6daa03ccd Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Sun, 15 Mar 2026 18:14:36 -0400 Subject: [PATCH 29/60] I updated constant folding and dead code elimination, working through tests now. --- packages/L2/src/L2/constant_folding.py | 22 +++++++--- packages/L2/src/L2/dead_code_elimination.py | 46 ++++++++++----------- 2 files changed, 40 insertions(+), 28 deletions(-) diff --git a/packages/L2/src/L2/constant_folding.py b/packages/L2/src/L2/constant_folding.py index 4589abe1..c360fd86 100644 --- a/packages/L2/src/L2/constant_folding.py +++ b/packages/L2/src/L2/constant_folding.py @@ -91,7 +91,9 @@ def constant_folding_term( case left, Immediate() as right: return _normalize_commutative_immediate_left("+", left, right) - case left, right: + # Coverage reports a synthetic exit arc on this fallback match arm. + # The arm is intentionally reachable and returns the non-folded primitive. + case left, right: # pragma: no branch return Primitive( operator="+", left=left, @@ -103,10 +105,14 @@ def constant_folding_term( case Immediate(value=i1), Immediate(value=i2): return Immediate(value=i1 - i2) - case left, right: + # Coverage reports a synthetic exit arc on this fallback match arm. + # The arm is intentionally reachable and returns the non-folded primitive. + case left, right: # pragma: no branch return Primitive(operator="-", left=left, right=right) - case "*": + # Coverage may report an extra arc on this literal case label under pattern matching. + # Runtime terms validated by the syntax model still follow normal folding logic below. + case "*": # pragma: no branch match recur(left), recur(right): case Immediate(value=i1), Immediate(value=i2): return Immediate(value=i1 * i2) @@ -126,7 +132,9 @@ def constant_folding_term( case left, Immediate() as right: return _normalize_commutative_immediate_left("*", left, right) - case left, right: + # Coverage reports a synthetic exit arc on this fallback match arm. + # The arm is intentionally reachable and returns the non-folded primitive. + case left, right: # pragma: no branch return Primitive(operator="*", left=left, right=right) case Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): @@ -141,7 +149,9 @@ def constant_folding_term( return folded_consequent if i1 < i2 else folded_otherwise case _: pass - case "==": + # Coverage may report an extra arc on this literal case label under pattern matching. + # Runtime terms validated by the syntax model use only "<" and "==". + case "==": # pragma: no branch match folded_left, folded_right: case Immediate(value=i1), Immediate(value=i2): return folded_consequent if i1 == i2 else folded_otherwise @@ -164,5 +174,7 @@ def constant_folding_term( case Store(base=base, index=index, value=value): return Store(base=recur(base), index=index, value=recur(value)) + # Coverage may report an extra structural arc for this match arm. + # Semantically this always returns the reconstructed Begin node. case Begin(effects=effects, value=value): # pragma: no branch return Begin(effects=recur_terms(effects, recur), value=recur(value)) diff --git a/packages/L2/src/L2/dead_code_elimination.py b/packages/L2/src/L2/dead_code_elimination.py index 699d4197..4bf2d16b 100644 --- a/packages/L2/src/L2/dead_code_elimination.py +++ b/packages/L2/src/L2/dead_code_elimination.py @@ -21,7 +21,7 @@ ) -def _is_pure(term: Term) -> bool: +def is_pure(term: Term) -> bool: match term: case Immediate(): return True @@ -30,22 +30,22 @@ def _is_pure(term: Term) -> bool: return True case Primitive(left=left, right=right): - return _is_pure(left) and _is_pure(right) + return is_pure(left) and is_pure(right) case Abstract(body=body): - return _is_pure(body) + return is_pure(body) case Let(bindings=bindings, body=body): - return all(_is_pure(value) for _, value in bindings) and _is_pure(body) + return all(is_pure(value) for _, value in bindings) and is_pure(body) case Branch(left=left, right=right, consequent=consequent, otherwise=otherwise): - return _is_pure(left) and _is_pure(right) and _is_pure(consequent) and _is_pure(otherwise) + return is_pure(left) and is_pure(right) and is_pure(consequent) and is_pure(otherwise) case Load(base=base): - return _is_pure(base) + return is_pure(base) case Begin(effects=effects, value=value): - return all(_is_pure(effect) for effect in effects) and _is_pure(value) + return all(is_pure(effect) for effect in effects) and is_pure(value) case Apply(): return False @@ -57,7 +57,7 @@ def _is_pure(term: Term) -> bool: return False -def _free_vars(term: Term) -> set[Identifier]: +def free_vars(term: Term) -> set[Identifier]: match term: case Immediate(): return set() @@ -66,30 +66,30 @@ def _free_vars(term: Term) -> set[Identifier]: return {name} case Primitive(left=left, right=right): - return _free_vars(left) | _free_vars(right) + return free_vars(left) | free_vars(right) case Apply(target=target, arguments=arguments): - result = _free_vars(target) + result = free_vars(target) for argument in arguments: - result |= _free_vars(argument) + result |= free_vars(argument) return result case Abstract(parameters=parameters, body=body): - return _free_vars(body) - set(parameters) + return free_vars(body) - set(parameters) case Branch(left=left, right=right, consequent=consequent, otherwise=otherwise): - return _free_vars(left) | _free_vars(right) | _free_vars(consequent) | _free_vars(otherwise) + return free_vars(left) | free_vars(right) | free_vars(consequent) | free_vars(otherwise) case Load(base=base): - return _free_vars(base) + return free_vars(base) case Store(base=base, value=value): - return _free_vars(base) | _free_vars(value) + return free_vars(base) | free_vars(value) case Begin(effects=effects, value=value): - result = _free_vars(value) + result = free_vars(value) for effect in effects: - result |= _free_vars(effect) + result |= free_vars(effect) return result case Allocate(): @@ -97,9 +97,9 @@ def _free_vars(term: Term) -> set[Identifier]: case Let(bindings=bindings, body=body): names = [name for name, _ in bindings] - result = _free_vars(body) - set(names) + result = free_vars(body) - set(names) for _, value in bindings: - result |= _free_vars(value) + result |= free_vars(value) return result @@ -114,14 +114,14 @@ def dead_code_elimination_term( new_values = [(name, recur(value)) for name, value in bindings] new_body = recur(body) - live = _free_vars(new_body) + live = free_vars(new_body) kept_reversed: list[tuple[Identifier, Term]] = [] for name, value in reversed(new_values): - if name in live or not _is_pure(value): + if name in live or not is_pure(value): kept_reversed.append((name, value)) live.discard(name) - live |= _free_vars(value) + live |= free_vars(value) kept = list(reversed(kept_reversed)) if len(kept) == 0: @@ -171,7 +171,7 @@ def dead_code_elimination_term( case Begin(effects=effects, value=value): # pragma: no branch new_effects = [recur(effect) for effect in effects] - kept_effects = [effect for effect in new_effects if not _is_pure(effect)] + kept_effects = [effect for effect in new_effects if not is_pure(effect)] new_value = recur(value) if len(kept_effects) == 0: From 45e443426a52e46577a140bd61720658afc7550c Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Sun, 15 Mar 2026 18:49:48 -0400 Subject: [PATCH 30/60] omtimize tests --- packages/L2/test/L2/test_optimize.py | 579 +++++++++++++++++++++++++-- 1 file changed, 540 insertions(+), 39 deletions(-) diff --git a/packages/L2/test/L2/test_optimize.py b/packages/L2/test/L2/test_optimize.py index 524a6d16..a0189410 100644 --- a/packages/L2/test/L2/test_optimize.py +++ b/packages/L2/test/L2/test_optimize.py @@ -1,9 +1,27 @@ -from L2.optimize import optimize_program +from typing import cast + +from L2.constant_folding import constant_folding_term +from L2.constant_propogation import constant_propogation_term +from L2.dead_code_elimination import dead_code_elimination_term, free_vars, is_pure +from L2.optimize import optimize_program, optimize_program_step from L2.syntax import ( + Abstract, + Allocate, + Apply, + Begin, + Branch, Immediate, + Let, + Load, Primitive, Program, + Reference, + Store, + Term, ) +from pydantic import ValidationError + +# Used copilot to help with writing these tests, gave it my expected input and output and it generated tests that I then modified to be more comprehensive and cover more edge cases. def test_optimize_program(): @@ -26,67 +44,550 @@ def test_optimize_program(): assert actual == expected -def test_optimize_program_no_optimization(): - program = Program( - parameters=[], - body=Primitive( +def test_constant_propogation_term_all_cases(): + term = Let( + bindings=[ + ("x", Immediate(value=1)), + ("y", Reference(name="x")), + ], + body=Begin( + effects=[ + Apply(target=Reference(name="f"), arguments=[Reference(name="y")]), + Store(base=Reference(name="arr"), index=0, value=Reference(name="x")), + ], + value=Branch( + operator="<", + left=Primitive(operator="+", left=Reference(name="x"), right=Immediate(value=2)), + right=Immediate(value=5), + consequent=Load(base=Allocate(count=1), index=0), + otherwise=Abstract(parameters=["x"], body=Reference(name="x")), + ), + ), + ) + + expected = Let( + bindings=[ + ("x", Immediate(value=1)), + ("y", Reference(name="x")), + ], + body=Begin( + effects=[ + Apply(target=Reference(name="f"), arguments=[Reference(name="x")]), + Store(base=Reference(name="arr"), index=0, value=Immediate(value=1)), + ], + value=Branch( + operator="<", + left=Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2)), + right=Immediate(value=5), + consequent=Load(base=Allocate(count=1), index=0), + otherwise=Abstract(parameters=["x"], body=Reference(name="x")), + ), + ), + ) + + actual = constant_propogation_term(term, context={"f": Reference(name="f")}) + + assert actual == expected + + +def test_constant_folding_plus_cases(): + term = Primitive( + operator="+", + left=Primitive(operator="+", left=Immediate(value=2), right=Reference(name="a")), + right=Primitive(operator="+", left=Immediate(value=3), right=Reference(name="b")), + ) + + expected = Primitive( + operator="+", + left=Immediate(value=5), + right=Primitive( operator="+", + left=Reference(name="a"), + right=Reference(name="b"), + ), + ) + + actual = constant_folding_term(term, context={}) + + assert actual == expected + + actual_immediate = constant_folding_term( + Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2)), + context={}, + ) + assert actual_immediate == Immediate(value=3) + + actual_zero = constant_folding_term( + Primitive(operator="+", left=Immediate(value=0), right=Reference(name="x")), + context={}, + ) + assert actual_zero == Reference(name="x") + + actual_normalize = constant_folding_term( + Primitive(operator="+", left=Reference(name="x"), right=Immediate(value=9)), + context={}, + ) + assert actual_normalize == Primitive( + operator="+", + left=Immediate(value=9), + right=Reference(name="x"), + ) + + +def test_constant_folding_minus_and_multiply_cases(): + actual_subtract = constant_folding_term( + Primitive(operator="-", left=Immediate(value=9), right=Immediate(value=4)), + context={}, + ) + assert actual_subtract == Immediate(value=5) + + actual_subtract_not_folded = constant_folding_term( + Primitive(operator="-", left=Reference(name="x"), right=Immediate(value=4)), + context={}, + ) + assert actual_subtract_not_folded == Primitive( + operator="-", + left=Reference(name="x"), + right=Immediate(value=4), + ) + + actual_multiply = constant_folding_term( + Primitive(operator="*", left=Immediate(value=3), right=Immediate(value=4)), + context={}, + ) + assert actual_multiply == Immediate(value=12) + + actual_mul_left_zero = constant_folding_term( + Primitive(operator="*", left=Immediate(value=0), right=Reference(name="x")), + context={}, + ) + assert actual_mul_left_zero == Immediate(value=0) + + actual_mul_right_zero = constant_folding_term( + Primitive(operator="*", left=Reference(name="x"), right=Immediate(value=0)), + context={}, + ) + assert actual_mul_right_zero == Immediate(value=0) + + actual_mul_left_one = constant_folding_term( + Primitive(operator="*", left=Immediate(value=1), right=Reference(name="x")), + context={}, + ) + assert actual_mul_left_one == Reference(name="x") + + actual_mul_right_one = constant_folding_term( + Primitive(operator="*", left=Reference(name="x"), right=Immediate(value=1)), + context={}, + ) + assert actual_mul_right_one == Reference(name="x") + + actual_mul_normalize = constant_folding_term( + Primitive(operator="*", left=Reference(name="x"), right=Immediate(value=7)), + context={}, + ) + assert actual_mul_normalize == Primitive( + operator="*", + left=Immediate(value=7), + right=Reference(name="x"), + ) + + actual_mul_not_folded = constant_folding_term( + Primitive(operator="*", left=Reference(name="x"), right=Reference(name="y")), + context={}, + ) + assert actual_mul_not_folded == Primitive( + operator="*", + left=Reference(name="x"), + right=Reference(name="y"), + ) + + +def test_constant_folding_non_primitive_cases_and_branches(): + actual_reference_hit = constant_folding_term(Reference(name="x"), context={"x": Immediate(value=4)}) + assert actual_reference_hit == Immediate(value=4) + + actual_reference_miss = constant_folding_term(Reference(name="y"), context={"x": Immediate(value=4)}) + assert actual_reference_miss == Reference(name="y") + + actual_abstract = constant_folding_term( + Abstract(parameters=["x"], body=Primitive(operator="+", left=Reference(name="x"), right=Immediate(value=1))), + context={}, + ) + assert actual_abstract == Abstract( + parameters=["x"], + body=Primitive(operator="+", left=Immediate(value=1), right=Reference(name="x")), + ) + + actual_apply = constant_folding_term( + Apply( + target=Reference(name="f"), + arguments=[Primitive(operator="+", left=Immediate(value=2), right=Immediate(value=3))], + ), + context={}, + ) + assert actual_apply == Apply(target=Reference(name="f"), arguments=[Immediate(value=5)]) + + actual_immediate = constant_folding_term(Immediate(value=11), context={}) + assert actual_immediate == Immediate(value=11) + + actual_lt_true = constant_folding_term( + Branch( + operator="<", left=Immediate(value=1), right=Immediate(value=2), + consequent=Immediate(value=7), + otherwise=Immediate(value=8), ), + context={}, ) + assert actual_lt_true == Immediate(value=7) - expected = program + actual_lt_false = constant_folding_term( + Branch( + operator="<", + left=Immediate(value=4), + right=Immediate(value=2), + consequent=Immediate(value=7), + otherwise=Immediate(value=8), + ), + context={}, + ) + assert actual_lt_false == Immediate(value=8) - actual = optimize_program(program) + actual_lt_fallback = constant_folding_term( + Branch( + operator="<", + left=Reference(name="x"), + right=Immediate(value=2), + consequent=Immediate(value=7), + otherwise=Immediate(value=8), + ), + context={}, + ) + assert actual_lt_fallback == Branch( + operator="<", + left=Reference(name="x"), + right=Immediate(value=2), + consequent=Immediate(value=7), + otherwise=Immediate(value=8), + ) - assert actual == expected + actual_eq_true = constant_folding_term( + Branch( + operator="==", + left=Immediate(value=3), + right=Immediate(value=3), + consequent=Immediate(value=9), + otherwise=Immediate(value=10), + ), + context={}, + ) + assert actual_eq_true == Immediate(value=9) + actual_eq_false = constant_folding_term( + Branch( + operator="==", + left=Immediate(value=3), + right=Immediate(value=4), + consequent=Immediate(value=9), + otherwise=Immediate(value=10), + ), + context={}, + ) + assert actual_eq_false == Immediate(value=10) -def test_optimize_program_nested(): - program = Program( - parameters=[], - body=Primitive( - operator="+", - left=Primitive( - operator="+", + actual_eq_fallback = constant_folding_term( + Branch( + operator="==", + left=Reference(name="x"), + right=Immediate(value=4), + consequent=Immediate(value=9), + otherwise=Immediate(value=10), + ), + context={}, + ) + assert actual_eq_fallback == Branch( + operator="==", + left=Reference(name="x"), + right=Immediate(value=4), + consequent=Immediate(value=9), + otherwise=Immediate(value=10), + ) + + actual_allocate = constant_folding_term(Allocate(count=3), context={}) + assert actual_allocate == Allocate(count=3) + + actual_load = constant_folding_term( + Load(base=Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2)), index=0), context={} + ) + assert actual_load == Load(base=Immediate(value=3), index=0) + + actual_store = constant_folding_term( + Store( + base=Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2)), + index=0, + value=Primitive(operator="+", left=Immediate(value=3), right=Immediate(value=4)), + ), + context={}, + ) + assert actual_store == Store(base=Immediate(value=3), index=0, value=Immediate(value=7)) + + actual_begin = constant_folding_term( + Begin( + effects=[Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2))], + value=Primitive(operator="+", left=Immediate(value=3), right=Immediate(value=4)), + ), + context={}, + ) + assert actual_begin == Begin(effects=[Immediate(value=3)], value=Immediate(value=7)) + + +def test_dead_codeis_pure_andfree_vars_cases(): + assert is_pure(Immediate(value=1)) is True + assert is_pure(Reference(name="x")) is True + assert is_pure(Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2))) is True + assert is_pure(Abstract(parameters=["x"], body=Reference(name="x"))) is True + assert is_pure(Let(bindings=[("x", Immediate(value=1))], body=Reference(name="x"))) is True + assert ( + is_pure( + Branch( + operator="<", left=Immediate(value=1), - right=Immediate(value=1), - ), - right=Immediate(value=1), + right=Immediate(value=2), + consequent=Immediate(value=3), + otherwise=Immediate(value=4), + ) + ) + is True + ) + assert is_pure(Load(base=Reference(name="x"), index=0)) is True + assert is_pure(Begin(effects=[Immediate(value=1)], value=Reference(name="x"))) is True + assert is_pure(Apply(target=Reference(name="f"), arguments=[])) is False + assert is_pure(Allocate(count=1)) is False + assert is_pure(Store(base=Reference(name="x"), index=0, value=Immediate(value=1))) is False + + assert free_vars(Immediate(value=1)) == set() + assert free_vars(Reference(name="x")) == {"x"} + assert free_vars(Primitive(operator="+", left=Reference(name="x"), right=Reference(name="y"))) == {"x", "y"} + assert free_vars(Apply(target=Reference(name="f"), arguments=[Reference(name="x")])) == {"f", "x"} + assert free_vars( + Abstract(parameters=["x"], body=Primitive(operator="+", left=Reference(name="x"), right=Reference(name="y"))) + ) == {"y"} + assert free_vars( + Branch( + operator="<", + left=Reference(name="a"), + right=Reference(name="b"), + consequent=Reference(name="c"), + otherwise=Reference(name="d"), + ) + ) == {"a", "b", "c", "d"} + assert free_vars(Load(base=Reference(name="arr"), index=0)) == {"arr"} + assert free_vars(Store(base=Reference(name="arr"), index=0, value=Reference(name="v"))) == {"arr", "v"} + assert free_vars(Begin(effects=[Reference(name="u")], value=Reference(name="v"))) == {"u", "v"} + assert free_vars(Allocate(count=1)) == set() + assert free_vars( + Let( + bindings=[ + ("x", Reference(name="a")), + ("y", Primitive(operator="+", left=Reference(name="x"), right=Reference(name="b"))), + ], + body=Primitive(operator="+", left=Reference(name="y"), right=Reference(name="c")), + ) + ) == {"a", "b", "c", "x"} + + +def test_dead_code_elimination_term_all_cases(): + term_drop_let = Let( + bindings=[("x", Immediate(value=1))], + body=Immediate(value=7), + ) + expected_drop_let = Immediate(value=7) + actual_drop_let = dead_code_elimination_term(term_drop_let, context={}) + assert actual_drop_let == expected_drop_let + + term_keep_let = Let( + bindings=[("x", Store(base=Reference(name="arr"), index=0, value=Immediate(value=1)))], + body=Immediate(value=7), + ) + expected_keep_let = Let( + bindings=[("x", Store(base=Reference(name="arr"), index=0, value=Immediate(value=1)))], + body=Immediate(value=7), + ) + actual_keep_let = dead_code_elimination_term(term_keep_let, context={}) + assert actual_keep_let == expected_keep_let + + actual_reference = dead_code_elimination_term(Reference(name="x"), context={}) + assert actual_reference == Reference(name="x") + + actual_abstract = dead_code_elimination_term( + Abstract(parameters=["x"], body=Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2))), + context={}, + ) + assert actual_abstract == Abstract( + parameters=["x"], body=Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2)) + ) + + actual_apply = dead_code_elimination_term( + Apply( + target=Reference(name="f"), + arguments=[Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2))], ), + context={}, + ) + assert actual_apply == Apply( + target=Reference(name="f"), + arguments=[Primitive(operator="+", left=Immediate(value=1), right=Immediate(value=2))], ) - expected = Program( - parameters=[], - body=Primitive( - operator="+", - left=Immediate(value=2), - right=Immediate(value=1), + actual_immediate = dead_code_elimination_term(Immediate(value=5), context={}) + assert actual_immediate == Immediate(value=5) + + actual_primitive = dead_code_elimination_term( + Primitive(operator="+", left=Reference(name="x"), right=Immediate(value=2)), + context={}, + ) + assert actual_primitive == Primitive(operator="+", left=Reference(name="x"), right=Immediate(value=2)) + + actual_branch = dead_code_elimination_term( + Branch( + operator="==", + left=Reference(name="x"), + right=Immediate(value=2), + consequent=Immediate(value=1), + otherwise=Immediate(value=0), ), + context={}, + ) + assert actual_branch == Branch( + operator="==", + left=Reference(name="x"), + right=Immediate(value=2), + consequent=Immediate(value=1), + otherwise=Immediate(value=0), ) - actual = optimize_program(program) + actual_allocate = dead_code_elimination_term(Allocate(count=2), context={}) + assert actual_allocate == Allocate(count=2) - assert actual == expected + actual_load = dead_code_elimination_term(Load(base=Reference(name="arr"), index=0), context={}) + assert actual_load == Load(base=Reference(name="arr"), index=0) + actual_store = dead_code_elimination_term( + Store(base=Reference(name="arr"), index=0, value=Immediate(value=7)), + context={}, + ) + assert actual_store == Store(base=Reference(name="arr"), index=0, value=Immediate(value=7)) -def test_optimize_program_no_optimization_nested(): - program = Program( + term_begin_drop = Begin(effects=[Immediate(value=1)], value=Reference(name="x")) + expected_begin_drop = Reference(name="x") + actual_begin_drop = dead_code_elimination_term(term_begin_drop, context={}) + assert actual_begin_drop == expected_begin_drop + + term_begin_keep = Begin( + effects=[Immediate(value=1), Store(base=Reference(name="arr"), index=0, value=Immediate(value=9))], + value=Reference(name="x"), + ) + expected_begin_keep = Begin( + effects=[Store(base=Reference(name="arr"), index=0, value=Immediate(value=9))], + value=Reference(name="x"), + ) + actual_begin_keep = dead_code_elimination_term(term_begin_keep, context={}) + assert actual_begin_keep == expected_begin_keep + + +def test_optimize_program_step_and_optimize_program(): + program_change = Program( parameters=[], - body=Primitive( - operator="+", - left=Primitive( - operator="+", - left=Immediate(value=1), - right=Immediate(value=2), - ), - right=Immediate(value=1), + body=Let( + bindings=[ + ("x", Immediate(value=1)), + ("y", Reference(name="x")), + ("z", Primitive(operator="+", left=Reference(name="y"), right=Immediate(value=2))), + ], + body=Reference(name="z"), ), ) - expected = program + expected_step_program = Program( + parameters=[], + body=Let( + bindings=[ + ("x", Immediate(value=1)), + ("y", Reference(name="x")), + ("z", Primitive(operator="+", left=Immediate(value=2), right=Reference(name="y"))), + ], + body=Reference(name="z"), + ), + ) - actual = optimize_program(program) + actual_step_program, changed = optimize_program_step(program_change) - assert actual == expected + assert actual_step_program == expected_step_program + assert changed is True + + program_no_change = Program( + parameters=["x"], + body=Reference(name="x"), + ) + + actual_same_program, changed_same = optimize_program_step(program_no_change) + + assert actual_same_program == program_no_change + assert changed_same is False + + actual_optimize = optimize_program(program_change) + + assert actual_optimize == expected_step_program + + actual_optimize_no_change = optimize_program(program_no_change) + + assert actual_optimize_no_change == program_no_change + + +def test_dead_code_helper_fallthrough_cases(): + invalid_term = cast(Term, object()) + + actualis_pure = is_pure(invalid_term) + assert actualis_pure is None + + actualfree_vars = free_vars(invalid_term) + assert actualfree_vars is None + + +def test_constant_folding_edge_fallthrough_cases(): + plus_invalid = Primitive.model_construct( + operator="+", + left=Reference(name="x"), + right=object(), + ) + with_validation_error_plus = False + try: + constant_folding_term(plus_invalid, context={}) + except ValidationError: + with_validation_error_plus = True + assert with_validation_error_plus is True + + minus_invalid = Primitive.model_construct( + operator="-", + left=Reference(name="x"), + right=object(), + ) + with_validation_error_minus = False + try: + constant_folding_term(minus_invalid, context={}) + except ValidationError: + with_validation_error_minus = True + assert with_validation_error_minus is True + + multiply_invalid = Primitive.model_construct( + operator="*", + left=Reference(name="x"), + right=object(), + ) + with_validation_error_multiply = False + try: + constant_folding_term(multiply_invalid, context={}) + except ValidationError: + with_validation_error_multiply = True + assert with_validation_error_multiply is True From ce5cedba153fc941a99905a12e68727ec942d443 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Mon, 16 Mar 2026 13:44:08 -0400 Subject: [PATCH 31/60] Had to fix some eliminate letrec errors... --- packages/L3/src/L3/eliminate_letrec.py | 98 ++++++++++++++++++++------ 1 file changed, 75 insertions(+), 23 deletions(-) diff --git a/packages/L3/src/L3/eliminate_letrec.py b/packages/L3/src/L3/eliminate_letrec.py index 4f668cff..cc6b044c 100644 --- a/packages/L3/src/L3/eliminate_letrec.py +++ b/packages/L3/src/L3/eliminate_letrec.py @@ -1,6 +1,5 @@ # noqa: F841 from collections.abc import Mapping -from functools import partial from L2 import syntax as L2 @@ -13,20 +12,73 @@ def eliminate_letrec_term( term: L3.Term, context: Context, ) -> L2.Term: - recur = partial(eliminate_letrec_term, context=context) - match term: case L3.Let(bindings=bindings, body=body): return L2.Let( - bindings=[(name, recur(value)) for name, value in bindings], - body=recur(body), + bindings=[(name, eliminate_letrec_term(value, context)) for name, value in bindings], + body=eliminate_letrec_term(body, context), ) case L3.LetRec(bindings=bindings, body=body): - return L2.Let( - bindings=[(name, recur(value)) for name, value in bindings], - body=recur(body, context={**context, **dict.fromkeys([name for name, _ in bindings])}), - ) + # Mark all binding names as recursive in the context + binding_names = [name for name, _ in bindings] + new_context: Context = {**context, **dict.fromkeys(binding_names)} # type: ignore + + # Check which bindings need heap allocation based on their values + # Simple values (Immediate, Allocate) can be stored directly + # Complex values (everything else) need Allocate + Store + simple_binding_indices: set[int] = set() + for i, (_, value) in enumerate(bindings): + match value: + case L3.Immediate() | L3.Allocate(): + simple_binding_indices.add(i) + case _: + pass + + # Separate simple and complex bindings + simple_bindings: list[tuple[str, L2.Term]] = [] + complex_bindings: list[tuple[str, L3.Term]] = [] + complex_binding_names: list[str] = [] + + for i, (name, value) in enumerate(bindings): + if i in simple_binding_indices: + transformed_value = eliminate_letrec_term(value, new_context) + simple_bindings.append((name, transformed_value)) + else: + complex_bindings.append((name, value)) + complex_binding_names.append(name) + + # Create stores for complex bindings + stores: list[L2.Term] = [] + for name, value in complex_bindings: + transformed_value = eliminate_letrec_term(value, new_context) + stores.append( + L2.Store( + base=L2.Reference(name=name), + index=0, + value=transformed_value, + ) + ) + + # Transform the body + transformed_body = eliminate_letrec_term(body, new_context) + + # Build the result + all_bindings = simple_bindings + [(name, L2.Allocate(count=1)) for name in complex_binding_names] + + if stores: + return L2.Let( + bindings=all_bindings, + body=L2.Begin( + effects=stores, + value=transformed_body, + ), + ) + else: + return L2.Let( + bindings=all_bindings, + body=transformed_body, + ) case L3.Reference(name=name): # if name is a recursive variable -> (Load (Reference name))) @@ -37,12 +89,12 @@ def eliminate_letrec_term( return L2.Reference(name=name) case L3.Abstract(parameters=parameters, body=body): - return L2.Abstract(parameters=parameters, body=recur(body)) + return L2.Abstract(parameters=parameters, body=eliminate_letrec_term(body, context)) case L3.Apply(target=target, arguments=arguments): return L2.Apply( - target=recur(target), - arguments=[recur(argument) for argument in arguments], + target=eliminate_letrec_term(target, context), + arguments=[eliminate_letrec_term(argument, context) for argument in arguments], ) case L3.Immediate(value=value): @@ -51,17 +103,17 @@ def eliminate_letrec_term( case L3.Primitive(operator=operator, left=left, right=right): return L2.Primitive( operator=operator, - left=recur(left), - right=recur(right), + left=eliminate_letrec_term(left, context), + right=eliminate_letrec_term(right, context), ) case L3.Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): return L2.Branch( operator=operator, - left=recur(left), - right=recur(right), - consequent=recur(consequent), - otherwise=recur(otherwise), + left=eliminate_letrec_term(left, context), + right=eliminate_letrec_term(right, context), + consequent=eliminate_letrec_term(consequent, context), + otherwise=eliminate_letrec_term(otherwise, context), ) case L3.Allocate(count=count): @@ -69,21 +121,21 @@ def eliminate_letrec_term( case L3.Load(base=base, index=index): return L2.Load( - base=recur(base), + base=eliminate_letrec_term(base, context), index=index, ) case L3.Store(base=base, index=index, value=value): return L2.Store( - base=recur(base), + base=eliminate_letrec_term(base, context), index=index, - value=recur(value), + value=eliminate_letrec_term(value, context), ) case L3.Begin(effects=effects, value=value): # pragma: no branch return L2.Begin( - effects=[recur(effect) for effect in effects], - value=recur(value), + effects=[eliminate_letrec_term(effect, context) for effect in effects], + value=eliminate_letrec_term(value, context), ) From b3494b8e2464635e12e14100967417305d50d2fd Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 20 Mar 2026 15:45:49 -0400 Subject: [PATCH 32/60] Finished unify and tests --- packages/L3/src/L3/uniqify.py | 10 +- packages/L3/test/L3/test_uniqify.py | 146 +++++++++++++++++++++++++++- 2 files changed, 150 insertions(+), 6 deletions(-) diff --git a/packages/L3/src/L3/uniqify.py b/packages/L3/src/L3/uniqify.py index d553499f..df1dec0f 100644 --- a/packages/L3/src/L3/uniqify.py +++ b/packages/L3/src/L3/uniqify.py @@ -42,7 +42,7 @@ def uniqify_term( return Let( bindings=new_bindings, - body=_term(body, new_context), + body=uniqify_term(body, new_context, fresh), ) case LetRec(bindings=bindings, body=body): @@ -53,9 +53,11 @@ def uniqify_term( new_bindings.append((new_name, value)) new_context = {**new_context, name: new_name} + _new_term = partial(uniqify_term, context=new_context, fresh=fresh) + return LetRec( - bindings=[(new_name, _term(value)) for new_name, value in new_bindings], - body=_term(body, new_context), + bindings=[(new_name, _new_term(value)) for new_name, value in new_bindings], + body=_new_term(body), ) case Reference(name=name): @@ -71,7 +73,7 @@ def uniqify_term( } return Abstract( parameters=new_parameters, - body=_term(body, new_context), + body=uniqify_term(body, new_context, fresh), ) case Apply(target=target, arguments=arguments): diff --git a/packages/L3/test/L3/test_uniqify.py b/packages/L3/test/L3/test_uniqify.py index e2243e9a..3fdaf62e 100644 --- a/packages/L3/test/L3/test_uniqify.py +++ b/packages/L3/test/L3/test_uniqify.py @@ -1,5 +1,19 @@ -from L3.syntax import Apply, Immediate, Let, Reference -from L3.uniqify import Context, uniqify_term +from L3.syntax import ( + Abstract, + Allocate, + Apply, + Begin, + Branch, + Immediate, + Let, + LetRec, + Load, + Primitive, + Program, + Reference, + Store, +) +from L3.uniqify import Context, uniqify_program, uniqify_term from util.sequential_name_generator import SequentialNameGenerator @@ -15,6 +29,18 @@ def test_uniqify_term_reference(): assert actual == expected +def test_uniqify_term_reference_not_in_context(): + term = Reference(name="x") + + context: Context = {} + fresh = SequentialNameGenerator() + actual = uniqify_term(term, context, fresh=fresh) + + expected = Reference(name="x") + + assert actual == expected + + def test_uniqify_immediate(): term = Immediate(value=42) @@ -59,3 +85,119 @@ def test_uniqify_term_let(): ) assert actual == expected + + +def test_uniqify_term_letrec_and_abstract_and_apply(): + term = LetRec( + bindings=[ + ( + "f", + Abstract( + parameters=["x"], + body=Apply( + target=Reference(name="f"), + arguments=[Reference(name="x")], + ), + ), + ), + ("y", Reference(name="f")), + ], + body=Reference(name="y"), + ) + + context: Context = {"f": "outer_f"} + fresh = SequentialNameGenerator() + actual = uniqify_term(term, context, fresh) + + expected = LetRec( + bindings=[ + ( + "f0", + Abstract( + parameters=["x0"], + body=Apply( + target=Reference(name="f0"), + arguments=[Reference(name="x0")], + ), + ), + ), + ("y0", Reference(name="f0")), + ], + body=Reference(name="y0"), + ) + + assert actual == expected + + +def test_uniqify_term_memory_and_control_forms(): + term = Begin( + effects=[ + Store( + base=Reference(name="ptr"), + index=0, + value=Primitive( + operator="+", + left=Reference(name="a"), + right=Reference(name="b"), + ), + ) + ], + value=Branch( + operator="<", + left=Reference(name="a"), + right=Immediate(value=0), + consequent=Allocate(count=1), + otherwise=Load(base=Reference(name="ptr"), index=1), + ), + ) + + context: Context = {"a": "a1", "b": "b1", "ptr": "p1"} + fresh = SequentialNameGenerator() + actual = uniqify_term(term, context, fresh) + + expected = Begin( + effects=[ + Store( + base=Reference(name="p1"), + index=0, + value=Primitive( + operator="+", + left=Reference(name="a1"), + right=Reference(name="b1"), + ), + ) + ], + value=Branch( + operator="<", + left=Reference(name="a1"), + right=Immediate(value=0), + consequent=Allocate(count=1), + otherwise=Load(base=Reference(name="p1"), index=1), + ), + ) + + assert actual == expected + + +def test_uniqify_program(): + program = Program( + parameters=["x", "y"], + body=Primitive( + operator="+", + left=Reference(name="x"), + right=Reference(name="y"), + ), + ) + + _, actual = uniqify_program(program) + + expected = Program( + parameters=["x0", "y0"], + body=Primitive( + operator="+", + left=Reference(name="x0"), + right=Reference(name="y0"), + ), + ) + + assert actual == expected From 26f20e6ca15ecd6bafdfeff58dd1bf0f16e343ce Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 20 Mar 2026 15:58:34 -0400 Subject: [PATCH 33/60] Added a comment to push a new change for codecov to hopefully run --- packages/L3/src/L3/uniqify.py | 1 + 1 file changed, 1 insertion(+) diff --git a/packages/L3/src/L3/uniqify.py b/packages/L3/src/L3/uniqify.py index df1dec0f..ba3180a4 100644 --- a/packages/L3/src/L3/uniqify.py +++ b/packages/L3/src/L3/uniqify.py @@ -24,6 +24,7 @@ type Context = Mapping[Identifier, Identifier] +# This pass is responsible for renaming all identifiers in a program to be unique. This is necessary for the later stages of the compiler, which rely on the fact that all identifiers are unique. def uniqify_term( term: Term, context: Context, From 88a274fef10a0b5c1b199ad06658a660ed37ab8c Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 3 Apr 2026 13:55:39 -0400 Subject: [PATCH 34/60] Current class changes to cps --- packages/L2/src/L2/cps_convert.py | 230 +++++++++++++++++++----------- 1 file changed, 148 insertions(+), 82 deletions(-) diff --git a/packages/L2/src/L2/cps_convert.py b/packages/L2/src/L2/cps_convert.py index 62eddb8d..953f2932 100644 --- a/packages/L2/src/L2/cps_convert.py +++ b/packages/L2/src/L2/cps_convert.py @@ -1,82 +1,148 @@ -# from collections.abc import Callable, Sequence -# from functools import partial - -# from L1 import syntax as L1 - -# from L2 import syntax as L2 - - -# def cps_convert_term( -# term: L2.Term, -# k: Callable[[L1.Identifier], L1.Statement], -# fresh: Callable[[str], str], -# ) -> L1.Statement: -# _term = partial(cps_convert_term, fresh=fresh) -# _terms = partial(cps_convert_terms, fresh=fresh) - -# match term: -# case L2.Let(bindings=bindings, body=body): -# pass - -# case L2.Reference(name=name): -# pass - -# case L2.Abstract(parameters=parameters, body=body): -# pass - -# case L2.Apply(target=target, arguments=arguments): -# pass - -# case L2.Immediate(value=value): -# pass - -# case L2.Primitive(operator=operator, left=left, right=right): -# pass - -# case L2.Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): -# pass - -# case L2.Allocate(count=count): -# pass - -# case L2.Load(base=base, index=index): -# pass - -# case L2.Store(base=base, index=index, value=value): -# pass - -# case L2.Begin(effects=effects, value=value): # pragma: no branch -# pass - - -# def cps_convert_terms( -# terms: Sequence[L2.Term], -# k: Callable[[Sequence[L1.Identifier]], L1.Statement], -# fresh: Callable[[str], str], -# ) -> L1.Statement: -# _term = partial(cps_convert_term, fresh=fresh) -# _terms = partial(cps_convert_terms, fresh=fresh) - -# match terms: -# case []: -# return k([]) - -# case [first, *rest]: -# return _term(first, lambda first: _terms(rest, lambda rest: k([first, *rest]))) - -# case _: # pragma: no cover -# raise ValueError(terms) - - -# def cps_convert_program( -# program: L2.Program, -# fresh: Callable[[str], str], -# ) -> L1.Program: -# _term = partial(cps_convert_term, fresh=fresh) - -# match program: -# case L2.Program(parameters=parameters, body=body): # pragma: no branch -# return L1.Program( -# parameters=parameters, -# body=_term(body, lambda value: L1.Halt(value=value)), -# ) +from collections.abc import Callable, Sequence +from functools import partial + +from L1 import syntax as L1 + +from L2 import syntax as L2 + + +def cps_convert_term( + term: L2.Term, + m: Callable[[L1.Identifier], L1.Statement], + fresh: Callable[[str], str], +) -> L1.Statement: + _term = partial(cps_convert_term, fresh=fresh) + _terms = partial(cps_convert_terms, fresh=fresh) + + match term: + case L2.Let(bindings=bindings, body=body): + result = _term(body, m) + + for name, value in reversed(bindings): + result = _term(value, lambda value: L1.Copy(destination=name, source=value, then=result)) + + return result + + case L2.Reference(name=name): + return m(name) + + case L2.Abstract(parameters=parameters, body=body): + tmp = fresh("t") + k = fresh("k") + L1.Abstract( + destination=tmp, + parameters=[*parameters, k], + body=_term(body, lambda body: L1.Apply(target=k, arguments=[body])), + then=m(tmp), + ) + + case L2.Apply(target=target, arguments=arguments): + k = fresh("k") + tmp = fresh("t") + return L1.Abstract( + destination=k, + parameters=[tmp], + body=m(tmp), + then=_term( + target, + lambda target: _terms( + arguments, + lambda arguments: L1.Apply(target=target, arguments=[*arguments, k]), + ), + ), + ) + + case L2.Immediate(value=value): + tmp = fresh("t") + return L1.Immediate(destination=tmp, value=value, then=m(tmp)) + + case L2.Primitive(operator=operator, left=left, right=right): + tmp = fresh("t") + return _term( + left, + lambda left: _term( + right, + lambda right: L1.Primitive(destination=tmp, operator=operator, left=left, right=right, then=m(tmp)), + ), + ) + + case L2.Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): + return _term( + left, + lambda left: _term( + right, + lambda right: L1.Branch( + operator=operator, + left=left, + right=right, + then=_term(consequent, lambda consequent: L1.Apply()), + otherwise=_term(otherwise, m), + ), + ), + ) + + case L2.Allocate(count=count): + tmp = fresh("t") + return L1.Allocate(destination=tmp, count=count, then=m(tmp)) + + case L2.Load(base=base, index=index): + tmp = fresh("t") + return _term( + base, + lambda base: L1.Load(destination=tmp, base=base, index=index, then=m(tmp)), + ) + + # Should double check this + case L2.Store(base=base, index=index, value=value): + tmp = fresh("t") + return _term( + base, + lambda base: _term( + value, + lambda value: L1.Store( + base=base, index=index, value=value, then=L1.Immediate(destination=tmp, value=0, then=m(tmp)) + ), + ), + ) + + case L2.Begin(effects=effects, value=value): # pragma: no branch + return _terms( + effects, + lambda effects: _term( + value, + lambda value: m(value), + ), + ) + + +def cps_convert_terms( + terms: Sequence[L2.Term], + k: Callable[[Sequence[L1.Identifier]], L1.Statement], + fresh: Callable[[str], str], +) -> L1.Statement: + _term = partial(cps_convert_term, fresh=fresh) + _terms = partial(cps_convert_terms, fresh=fresh) + + match terms: + case []: + return k([]) + + case [first, *rest]: + return _term(first, lambda first: _terms(rest, lambda rest: k([first, *rest]))) + + case _: # pragma: no cover + raise ValueError(terms) + + +def cps_convert_program( + program: L2.Program, + fresh: Callable[[str], str], +) -> L1.Program: + _term = partial(cps_convert_term, fresh=fresh) + + match program: + case L2.Program(parameters=parameters, body=body): # pragma: no branch + return L1.Program( + parameters=parameters, + body=_term(body, lambda value: L1.Halt(value=value)), + ) From 0064c43a723481b9d725999e6a0f313d212476c7 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 3 Apr 2026 14:15:10 -0400 Subject: [PATCH 35/60] Uncommented tests and finished cps convert --- packages/L2/src/L2/cps_convert.py | 29 +- packages/L2/test/L2/test_cps_convert.py | 444 ++++++++++++------------ 2 files changed, 240 insertions(+), 233 deletions(-) diff --git a/packages/L2/src/L2/cps_convert.py b/packages/L2/src/L2/cps_convert.py index 953f2932..b9f1b2ad 100644 --- a/packages/L2/src/L2/cps_convert.py +++ b/packages/L2/src/L2/cps_convert.py @@ -29,7 +29,7 @@ def cps_convert_term( case L2.Abstract(parameters=parameters, body=body): tmp = fresh("t") k = fresh("k") - L1.Abstract( + return L1.Abstract( destination=tmp, parameters=[*parameters, k], body=_term(body, lambda body: L1.Apply(target=k, arguments=[body])), @@ -67,16 +67,23 @@ def cps_convert_term( ) case L2.Branch(operator=operator, left=left, right=right, consequent=consequent, otherwise=otherwise): - return _term( - left, - lambda left: _term( - right, - lambda right: L1.Branch( - operator=operator, - left=left, - right=right, - then=_term(consequent, lambda consequent: L1.Apply()), - otherwise=_term(otherwise, m), + j = fresh("j") + tmp = fresh("t") + return L1.Abstract( + destination=j, + parameters=[tmp], + body=m(tmp), + then=_term( + left, + lambda left: _term( + right, + lambda right: L1.Branch( + operator=operator, + left=left, + right=right, + then=_term(consequent, lambda consequent: L1.Apply(target=j, arguments=[consequent])), + otherwise=_term(otherwise, lambda otherwise: L1.Apply(target=j, arguments=[otherwise])), + ), ), ), ) diff --git a/packages/L2/test/L2/test_cps_convert.py b/packages/L2/test/L2/test_cps_convert.py index cf45d29e..1d47e2a3 100644 --- a/packages/L2/test/L2/test_cps_convert.py +++ b/packages/L2/test/L2/test_cps_convert.py @@ -1,247 +1,247 @@ -# from L1 import syntax as L1 -# from L2 import syntax as L2 -# from L2.cps_convert import cps_convert_program, cps_convert_term -# from util.sequential_name_generator import SequentialNameGenerator +from L1 import syntax as L1 +from L2 import syntax as L2 +from L2.cps_convert import cps_convert_program, cps_convert_term +from util.sequential_name_generator import SequentialNameGenerator -# def k(v: L1.Identifier) -> L1.Statement: -# return L1.Halt(value=v) +def k(v: L1.Identifier) -> L1.Statement: + return L1.Halt(value=v) -# def test_cps_convert_term_name(): -# term = L2.Reference(name="x") +def test_cps_convert_term_name(): + term = L2.Reference(name="x") -# fresh = SequentialNameGenerator() + fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) + actual = cps_convert_term(term, k, fresh) -# expected = L1.Halt(value="x") -# assert actual == expected + expected = L1.Halt(value="x") + assert actual == expected -# def test_cps_convert_term_immediate(): -# term = L2.Immediate(value=42) +def test_cps_convert_term_immediate(): + term = L2.Immediate(value=42) -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) -# expected = L1.Immediate( -# destination="t0", -# value=42, -# then=L1.Halt(value="t0"), -# ) + expected = L1.Immediate( + destination="t0", + value=42, + then=L1.Halt(value="t0"), + ) -# assert actual == expected + assert actual == expected -# def test_cps_convert_term_primitive(): -# term = L2.Primitive( -# operator="+", -# left=L2.Reference(name="x"), -# right=L2.Reference(name="y"), -# ) +def test_cps_convert_term_primitive(): + term = L2.Primitive( + operator="+", + left=L2.Reference(name="x"), + right=L2.Reference(name="y"), + ) -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) -# expected = L1.Primitive( -# destination="t0", -# operator="+", -# left="x", -# right="y", -# then=L1.Halt(value="t0"), -# ) - -# assert actual == expected - - -# def test_cps_convert_term_let(): -# term = L2.Let( -# bindings=[ -# ("a", L2.Reference(name="x")), -# ("b", L2.Reference(name="y")), -# ], -# body=L2.Reference(name="b"), -# ) + expected = L1.Primitive( + destination="t0", + operator="+", + left="x", + right="y", + then=L1.Halt(value="t0"), + ) + + assert actual == expected + + +def test_cps_convert_term_let(): + term = L2.Let( + bindings=[ + ("a", L2.Reference(name="x")), + ("b", L2.Reference(name="y")), + ], + body=L2.Reference(name="b"), + ) -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) - -# expected = L1.Copy( -# destination="a", -# source="x", -# then=L1.Copy( -# destination="b", -# source="y", -# then=L1.Halt(value="b"), -# ), -# ) + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) + + expected = L1.Copy( + destination="a", + source="x", + then=L1.Copy( + destination="b", + source="y", + then=L1.Halt(value="b"), + ), + ) -# assert actual == expected + assert actual == expected -# def test_cps_convert_term_abstract(): -# term = L2.Abstract( -# parameters=["x"], -# body=L2.Reference(name="x"), -# ) - -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) +def test_cps_convert_term_abstract(): + term = L2.Abstract( + parameters=["x"], + body=L2.Reference(name="x"), + ) + + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) -# expected = L1.Abstract( -# destination="t0", -# parameters=["x", "k0"], -# body=L1.Apply(target="k0", arguments=["x"]), -# then=L1.Halt(value="t0"), -# ) + expected = L1.Abstract( + destination="t0", + parameters=["x", "k0"], + body=L1.Apply(target="k0", arguments=["x"]), + then=L1.Halt(value="t0"), + ) -# assert actual == expected + assert actual == expected -# def test_cps_convert_term_apply(): -# term = L2.Apply( -# target=L2.Reference(name="f"), -# arguments=[ -# L2.Reference(name="y"), -# ], -# ) - -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) - -# expected = L1.Abstract( -# destination="k0", -# parameters=["t0"], -# body=L1.Halt(value="t0"), -# then=L1.Apply( -# target="f", -# arguments=["y", "k0"], -# ), -# ) - -# assert actual == expected - - -# def test_cps_convert_term_branch(): -# term = L2.Branch( -# operator="==", -# left=L2.Reference(name="x"), -# right=L2.Reference(name="y"), -# consequent=L2.Reference(name="a"), -# otherwise=L2.Reference(name="b"), -# ) - -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) - -# expected = L1.Abstract( -# destination="j0", -# parameters=["t0"], -# body=L1.Halt(value="t0"), -# then=L1.Branch( -# operator="==", -# left="x", -# right="y", -# then=L1.Apply( -# target="j0", -# arguments=["a"], -# ), -# otherwise=L1.Apply( -# target="j0", -# arguments=["b"], -# ), -# ), -# ) - -# assert actual == expected - - -# def test_cps_convert_term_allocate(): -# term = L2.Allocate(count=0) - -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) - -# expected = L1.Allocate( -# destination="t0", -# count=0, -# then=L1.Halt(value="t0"), -# ) - -# assert actual == expected - - -# def test_cps_convert_term_load(): -# term_load = L2.Load( -# base=L2.Reference(name="x"), -# index=0, -# ) - -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term_load, k, fresh) - -# expected = L1.Load( -# destination="t0", -# base="x", -# index=0, -# then=L1.Halt(value="t0"), -# ) - -# assert actual == expected - - -# def test_cps_convert_term_store(): -# term = L2.Store( -# base=L2.Reference(name="x"), -# index=0, -# value=L2.Reference(name="y"), -# ) - -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) - -# expected = L1.Store( -# base="x", -# index=0, -# value="y", -# then=L1.Immediate( -# destination="t0", -# value=0, -# then=L1.Halt(value="t0"), -# ), -# ) - -# assert actual == expected - - -# def test_cps_convert_term_begin(): -# term = L2.Begin( -# effects=[ -# L2.Reference(name="x"), -# ], -# value=L2.Reference(name="y"), -# ) - -# fresh = SequentialNameGenerator() -# actual = cps_convert_term(term, k, fresh) - -# expected = L1.Halt(value="y") -# assert actual == expected - - -# def test_cps_convert_program(): -# program = L2.Program( -# parameters=["x"], -# body=L2.Reference(name="x"), -# ) - -# fresh = SequentialNameGenerator() -# actual = cps_convert_program(program, fresh) - -# expected = L1.Program( -# parameters=["x"], -# body=L1.Halt(value="x"), -# ) +def test_cps_convert_term_apply(): + term = L2.Apply( + target=L2.Reference(name="f"), + arguments=[ + L2.Reference(name="y"), + ], + ) + + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) + + expected = L1.Abstract( + destination="k0", + parameters=["t0"], + body=L1.Halt(value="t0"), + then=L1.Apply( + target="f", + arguments=["y", "k0"], + ), + ) + + assert actual == expected + + +def test_cps_convert_term_branch(): + term = L2.Branch( + operator="==", + left=L2.Reference(name="x"), + right=L2.Reference(name="y"), + consequent=L2.Reference(name="a"), + otherwise=L2.Reference(name="b"), + ) + + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) + + expected = L1.Abstract( + destination="j0", + parameters=["t0"], + body=L1.Halt(value="t0"), + then=L1.Branch( + operator="==", + left="x", + right="y", + then=L1.Apply( + target="j0", + arguments=["a"], + ), + otherwise=L1.Apply( + target="j0", + arguments=["b"], + ), + ), + ) + + assert actual == expected + + +def test_cps_convert_term_allocate(): + term = L2.Allocate(count=0) + + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) + + expected = L1.Allocate( + destination="t0", + count=0, + then=L1.Halt(value="t0"), + ) + + assert actual == expected + + +def test_cps_convert_term_load(): + term_load = L2.Load( + base=L2.Reference(name="x"), + index=0, + ) + + fresh = SequentialNameGenerator() + actual = cps_convert_term(term_load, k, fresh) + + expected = L1.Load( + destination="t0", + base="x", + index=0, + then=L1.Halt(value="t0"), + ) + + assert actual == expected + + +def test_cps_convert_term_store(): + term = L2.Store( + base=L2.Reference(name="x"), + index=0, + value=L2.Reference(name="y"), + ) + + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) + + expected = L1.Store( + base="x", + index=0, + value="y", + then=L1.Immediate( + destination="t0", + value=0, + then=L1.Halt(value="t0"), + ), + ) + + assert actual == expected + + +def test_cps_convert_term_begin(): + term = L2.Begin( + effects=[ + L2.Reference(name="x"), + ], + value=L2.Reference(name="y"), + ) + + fresh = SequentialNameGenerator() + actual = cps_convert_term(term, k, fresh) + + expected = L1.Halt(value="y") + assert actual == expected + + +def test_cps_convert_program(): + program = L2.Program( + parameters=["x"], + body=L2.Reference(name="x"), + ) + + fresh = SequentialNameGenerator() + actual = cps_convert_program(program, fresh) + + expected = L1.Program( + parameters=["x"], + body=L1.Halt(value="x"), + ) -# assert actual == expected + assert actual == expected From 17a13dc55d32a405bb3ad51a97a67a0053d16e2d Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 15 Apr 2026 23:16:08 -0400 Subject: [PATCH 36/60] initial lsp example --- lsp/.gitignore | 4 + lsp/.vscode/extensions.json | 9 + lsp/.vscode/launch.json | 34 + lsp/.vscode/settings.json | 8 + lsp/.vscode/tasks.json | 33 + lsp/.vscodeignore | 15 + lsp/README.md | 37 + lsp/client/package-lock.json | 1286 ++++++++ lsp/client/package.json | 23 + lsp/client/src/extension.ts | 57 + lsp/client/src/test/completion.test.ts | 43 + lsp/client/src/test/diagnostics.test.ts | 41 + lsp/client/src/test/helper.ts | 47 + lsp/client/src/test/index.ts | 40 + lsp/client/src/test/runTest.ts | 27 + lsp/client/tsconfig.json | 20 + lsp/client/tsconfig.tsbuildinfo | 1 + lsp/eslint.config.mjs | 44 + lsp/package-lock.json | 3750 +++++++++++++++++++++++ lsp/package.json | 72 + lsp/scripts/e2e.sh | 6 + lsp/server/package-lock.json | 92 + lsp/server/package.json | 19 + lsp/server/src/server.ts | 249 ++ lsp/server/tsconfig.json | 21 + lsp/server/tsconfig.tsbuildinfo | 1 + lsp/tsconfig.json | 27 + 27 files changed, 6006 insertions(+) create mode 100644 lsp/.gitignore create mode 100644 lsp/.vscode/extensions.json create mode 100644 lsp/.vscode/launch.json create mode 100644 lsp/.vscode/settings.json create mode 100644 lsp/.vscode/tasks.json create mode 100644 lsp/.vscodeignore create mode 100644 lsp/README.md create mode 100644 lsp/client/package-lock.json create mode 100644 lsp/client/package.json create mode 100644 lsp/client/src/extension.ts create mode 100644 lsp/client/src/test/completion.test.ts create mode 100644 lsp/client/src/test/diagnostics.test.ts create mode 100644 lsp/client/src/test/helper.ts create mode 100644 lsp/client/src/test/index.ts create mode 100644 lsp/client/src/test/runTest.ts create mode 100644 lsp/client/tsconfig.json create mode 100644 lsp/client/tsconfig.tsbuildinfo create mode 100644 lsp/eslint.config.mjs create mode 100644 lsp/package-lock.json create mode 100644 lsp/package.json create mode 100755 lsp/scripts/e2e.sh create mode 100644 lsp/server/package-lock.json create mode 100644 lsp/server/package.json create mode 100644 lsp/server/src/server.ts create mode 100644 lsp/server/tsconfig.json create mode 100644 lsp/server/tsconfig.tsbuildinfo create mode 100644 lsp/tsconfig.json diff --git a/lsp/.gitignore b/lsp/.gitignore new file mode 100644 index 00000000..bf962da1 --- /dev/null +++ b/lsp/.gitignore @@ -0,0 +1,4 @@ +out +node_modules +client/server +.vscode-test \ No newline at end of file diff --git a/lsp/.vscode/extensions.json b/lsp/.vscode/extensions.json new file mode 100644 index 00000000..af515502 --- /dev/null +++ b/lsp/.vscode/extensions.json @@ -0,0 +1,9 @@ +{ + // See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations. + // Extension identifier format: ${publisher}.${name}. Example: vscode.csharp + + // List of extensions which should be recommended for users of this workspace. + "recommendations": [ + "dbaeumer.vscode-eslint" + ] +} \ No newline at end of file diff --git a/lsp/.vscode/launch.json b/lsp/.vscode/launch.json new file mode 100644 index 00000000..4ba56122 --- /dev/null +++ b/lsp/.vscode/launch.json @@ -0,0 +1,34 @@ +// A launch configuration that compiles the extension and then opens it inside a new window +{ + "version": "0.2.0", + "configurations": [ + { + "type": "extensionHost", + "request": "launch", + "name": "Launch Client", + "runtimeExecutable": "${execPath}", + "args": ["--extensionDevelopmentPath=${workspaceRoot}"], + "outFiles": [ + "${workspaceRoot}/client/out/**/*.js", + "${workspaceRoot}/server/out/**/*.js" + ], + "autoAttachChildProcesses": true, + "preLaunchTask": { + "type": "npm", + "script": "watch" + } + }, + { + "name": "Language Server E2E Test", + "type": "extensionHost", + "request": "launch", + "runtimeExecutable": "${execPath}", + "args": [ + "--extensionDevelopmentPath=${workspaceRoot}", + "--extensionTestsPath=${workspaceRoot}/client/out/test/index", + "${workspaceRoot}/client/testFixture" + ], + "outFiles": ["${workspaceRoot}/client/out/test/**/*.js"] + } + ] +} diff --git a/lsp/.vscode/settings.json b/lsp/.vscode/settings.json new file mode 100644 index 00000000..390d2993 --- /dev/null +++ b/lsp/.vscode/settings.json @@ -0,0 +1,8 @@ +{ + "editor.insertSpaces": false, + "typescript.tsc.autoDetect": "off", + "typescript.preferences.quoteStyle": "single", + "editor.codeActionsOnSave": { + "source.fixAll.eslint": "explicit" + } +} \ No newline at end of file diff --git a/lsp/.vscode/tasks.json b/lsp/.vscode/tasks.json new file mode 100644 index 00000000..070d88eb --- /dev/null +++ b/lsp/.vscode/tasks.json @@ -0,0 +1,33 @@ +{ + "version": "2.0.0", + "tasks": [ + { + "type": "npm", + "script": "compile", + "group": "build", + "presentation": { + "panel": "dedicated", + "reveal": "never" + }, + "problemMatcher": [ + "$tsc" + ] + }, + { + "type": "npm", + "script": "watch", + "isBackground": true, + "group": { + "kind": "build", + "isDefault": true + }, + "presentation": { + "panel": "dedicated", + "reveal": "never" + }, + "problemMatcher": [ + "$tsc-watch" + ] + } + ] +} \ No newline at end of file diff --git a/lsp/.vscodeignore b/lsp/.vscodeignore new file mode 100644 index 00000000..2a6b6a99 --- /dev/null +++ b/lsp/.vscodeignore @@ -0,0 +1,15 @@ +.vscode/** +**/*.ts +**/*.map +.gitignore +**/tsconfig.json +**/tsconfig.base.json +contributing.md +.travis.yml +client/node_modules/** +!client/node_modules/vscode-jsonrpc/** +!client/node_modules/vscode-languageclient/** +!client/node_modules/vscode-languageserver-protocol/** +!client/node_modules/vscode-languageserver-types/** +!client/node_modules/{minimatch,brace-expansion,concat-map,balanced-match}/** +!client/node_modules/{semver,lru-cache,yallist}/** \ No newline at end of file diff --git a/lsp/README.md b/lsp/README.md new file mode 100644 index 00000000..b81c1d29 --- /dev/null +++ b/lsp/README.md @@ -0,0 +1,37 @@ +# LSP Example + +Heavily documented sample code for https://code.visualstudio.com/api/language-extensions/language-server-extension-guide + +## Functionality + +This Language Server works for plain text file. It has the following language features: +- Completions +- Diagnostics regenerated on each file change or configuration change + +It also includes an End-to-End test. + +## Structure + +``` +. +├── client // Language Client +│ ├── src +│ │ ├── test // End to End tests for Language Client / Server +│ │ └── extension.ts // Language Client entry point +├── package.json // The extension manifest. +└── server // Language Server + └── src + └── server.ts // Language Server entry point +``` + +## Running the Sample + +- Run `npm install` in this folder. This installs all necessary npm modules in both the client and server folder +- Open VS Code on this folder. +- Press Ctrl+Shift+B to start compiling the client and server in [watch mode](https://code.visualstudio.com/docs/editor/tasks#:~:text=The%20first%20entry%20executes,the%20HelloWorld.js%20file.). +- Switch to the Run and Debug View in the Sidebar (Ctrl+Shift+D). +- Select `Launch Client` from the drop down (if it is not already). +- Press ▷ to run the launch config (F5). +- In the [Extension Development Host](https://code.visualstudio.com/api/get-started/your-first-extension#:~:text=Then%2C%20inside%20the%20editor%2C%20press%20F5.%20This%20will%20compile%20and%20run%20the%20extension%20in%20a%20new%20Extension%20Development%20Host%20window.) instance of VSCode, open a document in 'plain text' language mode. + - Type `j` or `t` to see `Javascript` and `TypeScript` completion. + - Enter text content such as `AAA aaa BBB`. 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b/lsp/client/package.json @@ -0,0 +1,23 @@ +{ + "name": "lsp-sample-client", + "description": "VSCode part of a language server", + "author": "Microsoft Corporation", + "license": "MIT", + "version": "0.0.1", + "publisher": "vscode", + "repository": { + "type": "git", + "url": "https://github.com/Microsoft/vscode-extension-samples" + }, + "engines": { + "vscode": "^1.100.0" + }, + "dependencies": { + "glob": "^11.0.0", + "vscode-languageclient": "^9.0.1" + }, + "devDependencies": { + "@types/vscode": "^1.100.0", + "@vscode/test-electron": "^2.3.9" + } +} \ No newline at end of file diff --git a/lsp/client/src/extension.ts b/lsp/client/src/extension.ts new file mode 100644 index 00000000..5baa3768 --- /dev/null +++ b/lsp/client/src/extension.ts @@ -0,0 +1,57 @@ +import * as path from 'path'; +import { workspace, ExtensionContext } from 'vscode'; + +import { + LanguageClient, + LanguageClientOptions, + ServerOptions, + TransportKind +} from 'vscode-languageclient/node'; + +let client: LanguageClient; + +export function activate(context: ExtensionContext) { + // The server is implemented in node + const serverModule = context.asAbsolutePath( + path.join('server', 'out', 'server.js') + ); + + // If the extension is launched in debug mode then the debug server options are used + // Otherwise the run options are used + const serverOptions: ServerOptions = { + run: { module: serverModule, transport: TransportKind.ipc }, + debug: { + module: serverModule, + transport: TransportKind.ipc, + } + }; + + // Options to control the language client + const clientOptions: LanguageClientOptions = { + // Register the server for l0, l1, l2, l3, and l4 documents along with the unsaved buffers + // so language features work before first save + documentSelector: [{ scheme: 'file', language: 'lsp-471c' }], + synchronize: { + // Notify the server about file changes to '.clientrc files contained in the workspace + fileEvents: workspace.createFileSystemWatcher('**/.clientrc') + } + }; + + // Create the language client and start the client. + client = new LanguageClient( + '471cLSP', + 'Language Server for the 471c language', + serverOptions, + clientOptions + ); + + // Start the client. This will also launch the server + client.start(); +} + +export function deactivate(): Thenable | undefined { + if (!client) { + return undefined; + } + return client.stop(); +} diff --git a/lsp/client/src/test/completion.test.ts b/lsp/client/src/test/completion.test.ts new file mode 100644 index 00000000..f3550788 --- /dev/null +++ b/lsp/client/src/test/completion.test.ts @@ -0,0 +1,43 @@ +/* -------------------------------------------------------------------------------------------- + * Copyright (c) Microsoft Corporation. All rights reserved. + * Licensed under the MIT License. See License.txt in the project root for license information. + * ------------------------------------------------------------------------------------------ */ + +import * as vscode from 'vscode'; +import * as assert from 'assert'; +import { getDocUri, activate } from './helper'; + +suite('Should do completion', () => { + const docUri = getDocUri('completion.txt'); + + test('Completes JS/TS in txt file', async () => { + await testCompletion(docUri, new vscode.Position(0, 0), { + items: [ + { label: 'JavaScript', kind: vscode.CompletionItemKind.Text }, + { label: 'TypeScript', kind: vscode.CompletionItemKind.Text } + ] + }); + }); +}); + +async function testCompletion( + docUri: vscode.Uri, + position: vscode.Position, + expectedCompletionList: vscode.CompletionList +) { + await activate(docUri); + + // Executing the command `vscode.executeCompletionItemProvider` to simulate triggering completion + const actualCompletionList = (await vscode.commands.executeCommand( + 'vscode.executeCompletionItemProvider', + docUri, + position + )) as vscode.CompletionList; + + assert.ok(actualCompletionList.items.length >= 2); + expectedCompletionList.items.forEach((expectedItem, i) => { + const actualItem = actualCompletionList.items[i]; + assert.equal(actualItem.label, expectedItem.label); + assert.equal(actualItem.kind, expectedItem.kind); + }); +} diff --git a/lsp/client/src/test/diagnostics.test.ts b/lsp/client/src/test/diagnostics.test.ts new file mode 100644 index 00000000..1aa8a36f --- /dev/null +++ b/lsp/client/src/test/diagnostics.test.ts @@ -0,0 +1,41 @@ +/* -------------------------------------------------------------------------------------------- + * Copyright (c) Microsoft Corporation. All rights reserved. + * Licensed under the MIT License. See License.txt in the project root for license information. + * ------------------------------------------------------------------------------------------ */ + +import * as vscode from 'vscode'; +import * as assert from 'assert'; +import { getDocUri, activate } from './helper'; + +suite('Should get diagnostics', () => { + const docUri = getDocUri('diagnostics.txt'); + + test('Diagnoses uppercase texts', async () => { + await testDiagnostics(docUri, [ + { message: 'ANY is all uppercase.', range: toRange(0, 0, 0, 3), severity: vscode.DiagnosticSeverity.Warning, source: 'ex' }, + { message: 'ANY is all uppercase.', range: toRange(0, 14, 0, 17), severity: vscode.DiagnosticSeverity.Warning, source: 'ex' }, + { message: 'OS is all uppercase.', range: toRange(0, 18, 0, 20), severity: vscode.DiagnosticSeverity.Warning, source: 'ex' } + ]); + }); +}); + +function toRange(sLine: number, sChar: number, eLine: number, eChar: number) { + const start = new vscode.Position(sLine, sChar); + const end = new vscode.Position(eLine, eChar); + return new vscode.Range(start, end); +} + +async function testDiagnostics(docUri: vscode.Uri, expectedDiagnostics: vscode.Diagnostic[]) { + await activate(docUri); + + const actualDiagnostics = vscode.languages.getDiagnostics(docUri); + + assert.equal(actualDiagnostics.length, expectedDiagnostics.length); + + expectedDiagnostics.forEach((expectedDiagnostic, i) => { + const actualDiagnostic = actualDiagnostics[i]; + assert.equal(actualDiagnostic.message, expectedDiagnostic.message); + assert.deepEqual(actualDiagnostic.range, expectedDiagnostic.range); + assert.equal(actualDiagnostic.severity, expectedDiagnostic.severity); + }); +} \ No newline at end of file diff --git a/lsp/client/src/test/helper.ts b/lsp/client/src/test/helper.ts new file mode 100644 index 00000000..6e6724d3 --- /dev/null +++ b/lsp/client/src/test/helper.ts @@ -0,0 +1,47 @@ +/* -------------------------------------------------------------------------------------------- + * Copyright (c) Microsoft Corporation. All rights reserved. + * Licensed under the MIT License. See License.txt in the project root for license information. + * ------------------------------------------------------------------------------------------ */ + +import * as vscode from 'vscode'; +import * as path from 'path'; + +export let doc: vscode.TextDocument; +export let editor: vscode.TextEditor; +export let documentEol: string; +export let platformEol: string; + +/** + * Activates the vscode.lsp-sample extension + */ +export async function activate(docUri: vscode.Uri) { + // The extensionId is `publisher.name` from package.json + const ext = vscode.extensions.getExtension('vscode-samples.lsp-sample')!; + await ext.activate(); + try { + doc = await vscode.workspace.openTextDocument(docUri); + editor = await vscode.window.showTextDocument(doc); + await sleep(2000); // Wait for server activation + } catch (e) { + console.error(e); + } +} + +async function sleep(ms: number) { + return new Promise(resolve => setTimeout(resolve, ms)); +} + +export const getDocPath = (p: string) => { + return path.resolve(__dirname, '../../testFixture', p); +}; +export const getDocUri = (p: string) => { + return vscode.Uri.file(getDocPath(p)); +}; + +export async function setTestContent(content: string): Promise { + const all = new vscode.Range( + doc.positionAt(0), + doc.positionAt(doc.getText().length) + ); + return editor.edit(eb => eb.replace(all, content)); +} diff --git a/lsp/client/src/test/index.ts b/lsp/client/src/test/index.ts new file mode 100644 index 00000000..eb59605b --- /dev/null +++ b/lsp/client/src/test/index.ts @@ -0,0 +1,40 @@ +/* -------------------------------------------------------------------------------------------- + * Copyright (c) Microsoft Corporation. All rights reserved. + * Licensed under the MIT License. See License.txt in the project root for license information. + * ------------------------------------------------------------------------------------------ */ +import * as path from 'path'; +import Mocha from 'mocha'; +import { glob } from 'glob'; + +export function run(): Promise { + // Create the mocha test + const mocha = new Mocha({ + ui: 'tdd', + color: true + }); + mocha.timeout(100000); + + const testsRoot = __dirname; + + return glob.glob('**.test.js', { cwd: testsRoot }).then(async files => { + + // Add files to the test suite + files.forEach(f => mocha.addFile(path.resolve(testsRoot, f))); + + try { + // Run the mocha test + await new Promise((resolve, reject) => { + mocha.run(failures => { + if (failures > 0) { + reject(`${failures} tests failed.`); + } else { + resolve(); + } + }); + }); + } catch (err) { + console.error(err); + throw err; + } + }); +} \ No newline at end of file diff --git a/lsp/client/src/test/runTest.ts b/lsp/client/src/test/runTest.ts new file mode 100644 index 00000000..f8d2985f --- /dev/null +++ b/lsp/client/src/test/runTest.ts @@ -0,0 +1,27 @@ +/*--------------------------------------------------------------------------------------------- + * Copyright (c) Microsoft Corporation. All rights reserved. + * Licensed under the MIT License. See License.txt in the project root for license information. + *--------------------------------------------------------------------------------------------*/ +import * as path from 'path'; + +import { runTests } from '@vscode/test-electron'; + +async function main() { + try { + // The folder containing the Extension Manifest package.json + // Passed to `--extensionDevelopmentPath` + const extensionDevelopmentPath = path.resolve(__dirname, '../../../'); + + // The path to test runner + // Passed to --extensionTestsPath + const extensionTestsPath = path.resolve(__dirname, './index'); + + // Download VS Code, unzip it and run the integration test + await runTests({ extensionDevelopmentPath, extensionTestsPath }); + } catch { + console.error('Failed to run tests'); + process.exit(1); + } +} + +main(); diff --git a/lsp/client/tsconfig.json b/lsp/client/tsconfig.json new file mode 100644 index 00000000..9ed6e579 --- /dev/null +++ b/lsp/client/tsconfig.json @@ -0,0 +1,20 @@ +{ + "compilerOptions": { + "module": "commonjs", + "target": "ES2024", + "lib": [ + "ES2024" + ], + "outDir": "out", + "rootDir": "src", + "sourceMap": true, + "strict": true + }, + "include": [ + "src" + ], + "exclude": [ + "node_modules", + ".vscode-test" + ] +} \ No newline at end of file diff --git a/lsp/client/tsconfig.tsbuildinfo b/lsp/client/tsconfig.tsbuildinfo new file mode 100644 index 00000000..c391fc8f --- /dev/null +++ b/lsp/client/tsconfig.tsbuildinfo @@ -0,0 +1 @@ +{"root":["./src/extension.ts","./src/test/completion.test.ts","./src/test/diagnostics.test.ts","./src/test/helper.ts","./src/test/index.ts","./src/test/runtest.ts"],"errors":true,"version":"5.9.2"} \ No newline at end of file diff --git a/lsp/eslint.config.mjs b/lsp/eslint.config.mjs new file mode 100644 index 00000000..ad264657 --- /dev/null +++ b/lsp/eslint.config.mjs @@ -0,0 +1,44 @@ +/** + * ESLint configuration for the project. + * + * See https://eslint.style and https://typescript-eslint.io for additional linting options. + */ +// @ts-check +import js from '@eslint/js'; +import tseslint from 'typescript-eslint'; +import stylistic from '@stylistic/eslint-plugin'; + +export default tseslint.config( + { + ignores: [ + '**/.vscode-test', + '**/out', + ] + }, + js.configs.recommended, + ...tseslint.configs.recommended, + ...tseslint.configs.stylistic, + { + plugins: { + '@stylistic': stylistic + }, + rules: { + 'curly': 'warn', + '@stylistic/semi': ['warn', 'always'], + '@typescript-eslint/no-empty-function': 'off', + '@typescript-eslint/naming-convention': [ + 'warn', + { + 'selector': 'import', + 'format': ['camelCase', 'PascalCase'] + } + ], + '@typescript-eslint/no-unused-vars': [ + 'error', + { + 'argsIgnorePattern': '^_' + } + ] + } + } +); \ No newline at end of file diff --git a/lsp/package-lock.json b/lsp/package-lock.json new file mode 100644 index 00000000..bf68f125 --- /dev/null +++ b/lsp/package-lock.json @@ -0,0 +1,3750 @@ +{ + "name": "lsp-sample", + "version": "1.0.0", + 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"extensions": [".l3"] + } + ], + "configuration": { + "type": "object", + "title": "Language Server for 471c configuration", + "properties": { + "languageServerExample.maxNumberOfProblems": { + "scope": "resource", + "type": "number", + "default": 100, + "description": "Controls the maximum number of problems produced by the server." + }, + "languageServerExample.trace.server": { + "scope": "window", + "type": "string", + "enum": [ + "off", + "messages", + "verbose" + ], + "default": "off", + "description": "Traces the communication between VS Code and the language server." + } + } + } + }, + "scripts": { + "vscode:prepublish": "npm run compile", + "compile": "tsc -b", + "watch": "tsc -b -w", + "lint": "eslint", + "postinstall": "cd client && npm install && cd ../server && npm install && cd ..", + "test": "sh ./scripts/e2e.sh" + }, + "devDependencies": { + "@eslint/js": "^9.13.0", + "@stylistic/eslint-plugin": "^2.9.0", + "@types/mocha": "^10.0.6", + "@types/node": "^22", + "eslint": "^9.13.0", + "mocha": "^10.3.0", + "typescript": "^5.9.2", + "typescript-eslint": "^8.39.0" + } +} \ No newline at end of file diff --git a/lsp/scripts/e2e.sh b/lsp/scripts/e2e.sh new file mode 100755 index 00000000..860c62ef --- /dev/null +++ b/lsp/scripts/e2e.sh @@ -0,0 +1,6 @@ +#!/usr/bin/env bash + +export CODE_TESTS_PATH="$(pwd)/client/out/test" +export CODE_TESTS_WORKSPACE="$(pwd)/client/testFixture" + +node "$(pwd)/client/out/test/runTest" \ No newline at end of file diff --git a/lsp/server/package-lock.json b/lsp/server/package-lock.json new file mode 100644 index 00000000..2ca80d82 --- /dev/null +++ b/lsp/server/package-lock.json @@ -0,0 +1,92 @@ +{ + "name": "lsp-sample-server", + "version": "1.0.0", + "lockfileVersion": 2, + "requires": true, + "packages": { + "": { + "name": "lsp-sample-server", + "version": "1.0.0", + "license": "MIT", + "dependencies": { + "vscode-languageserver": "^9.0.1", + "vscode-languageserver-textdocument": "^1.0.11" + }, + "engines": { + "node": 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"https://github.com/Microsoft/vscode-extension-samples" + }, + "dependencies": { + "vscode-languageserver": "^9.0.1", + "vscode-languageserver-textdocument": "^1.0.11" + }, + "scripts": {} +} diff --git a/lsp/server/src/server.ts b/lsp/server/src/server.ts new file mode 100644 index 00000000..73ddc891 --- /dev/null +++ b/lsp/server/src/server.ts @@ -0,0 +1,249 @@ +import { + createConnection, + TextDocuments, + Diagnostic, + DiagnosticSeverity, + ProposedFeatures, + InitializeParams, + DidChangeConfigurationNotification, + CompletionItem, + CompletionItemKind, + TextDocumentPositionParams, + TextDocumentSyncKind, + InitializeResult, + DocumentDiagnosticReportKind, + type DocumentDiagnosticReport +} from 'vscode-languageserver/node'; + +import { + TextDocument +} from 'vscode-languageserver-textdocument'; + +// Create a connection for the server, using Node's IPC as a transport. +// Also include all preview / proposed LSP features. +const connection = createConnection(ProposedFeatures.all); + +// Create a simple text document manager. +const documents = new TextDocuments(TextDocument); + +let hasConfigurationCapability = false; +let hasWorkspaceFolderCapability = false; +let hasDiagnosticRelatedInformationCapability = false; + +connection.onInitialize((params: InitializeParams) => { + const capabilities = params.capabilities; + + // Does the client support the `workspace/configuration` request? + // If not, we fall back using global settings. + hasConfigurationCapability = !!( + capabilities.workspace && !!capabilities.workspace.configuration + ); + hasWorkspaceFolderCapability = !!( + capabilities.workspace && !!capabilities.workspace.workspaceFolders + ); + hasDiagnosticRelatedInformationCapability = !!( + capabilities.textDocument && + capabilities.textDocument.publishDiagnostics && + capabilities.textDocument.publishDiagnostics.relatedInformation + ); + + const result: InitializeResult = { + capabilities: { + textDocumentSync: TextDocumentSyncKind.Incremental, + // Tell the client that this server supports code completion. + completionProvider: { + resolveProvider: true + }, + diagnosticProvider: { + interFileDependencies: false, + workspaceDiagnostics: false + } + } + }; + if (hasWorkspaceFolderCapability) { + result.capabilities.workspace = { + workspaceFolders: { + supported: true + } + }; + } + return result; +}); + +connection.onInitialized(() => { + if (hasConfigurationCapability) { + // Register for all configuration changes. + connection.client.register(DidChangeConfigurationNotification.type, undefined); + } + if (hasWorkspaceFolderCapability) { + connection.workspace.onDidChangeWorkspaceFolders(_event => { + connection.console.log('Workspace folder change event received.'); + }); + } +}); + +// The example settings +interface ExampleSettings { + maxNumberOfProblems: number; +} + +// The global settings, used when the `workspace/configuration` request is not supported by the client. +// Please note that this is not the case when using this server with the client provided in this example +// but could happen with other clients. +const defaultSettings: ExampleSettings = { maxNumberOfProblems: 1000 }; +let globalSettings: ExampleSettings = defaultSettings; + +// Cache the settings of all open documents +const documentSettings = new Map>(); + +connection.onDidChangeConfiguration(change => { + if (hasConfigurationCapability) { + // Reset all cached document settings + documentSettings.clear(); + } else { + globalSettings = ( + (change.settings.languageServerExample || defaultSettings) + ); + } + // Refresh the diagnostics since the `maxNumberOfProblems` could have changed. + // We could optimize things here and re-fetch the setting first can compare it + // to the existing setting, but this is out of scope for this example. + connection.languages.diagnostics.refresh(); +}); + +function getDocumentSettings(resource: string): Thenable { + if (!hasConfigurationCapability) { + return Promise.resolve(globalSettings); + } + let result = documentSettings.get(resource); + if (!result) { + result = connection.workspace.getConfiguration({ + scopeUri: resource, + section: 'languageServerExample' + }); + documentSettings.set(resource, result); + } + return result; +} + +// Only keep settings for open documents +documents.onDidClose(e => { + documentSettings.delete(e.document.uri); +}); + + +connection.languages.diagnostics.on(async (params) => { + const document = documents.get(params.textDocument.uri); + if (document !== undefined) { + return { + kind: DocumentDiagnosticReportKind.Full, + items: await validateTextDocument(document) + } satisfies DocumentDiagnosticReport; + } else { + // We don't know the document. We can either try to read it from disk + // or we don't report problems for it. + return { + kind: DocumentDiagnosticReportKind.Full, + items: [] + } satisfies DocumentDiagnosticReport; + } +}); + +// The content of a text document has changed. This event is emitted +// when the text document first opened or when its content has changed. +documents.onDidChangeContent(change => { + validateTextDocument(change.document); +}); + +async function validateTextDocument(textDocument: TextDocument): Promise { + // In this simple example we get the settings for every validate run. + const settings = await getDocumentSettings(textDocument.uri); + + // The validator creates diagnostics for all uppercase words length 2 and more + const text = textDocument.getText(); + const pattern = /\b[A-Z]{2,}\b/g; + let m: RegExpExecArray | null; + + let problems = 0; + const diagnostics: Diagnostic[] = []; + while ((m = pattern.exec(text)) && problems < settings.maxNumberOfProblems) { + problems++; + const diagnostic: Diagnostic = { + severity: DiagnosticSeverity.Warning, + range: { + start: textDocument.positionAt(m.index), + end: textDocument.positionAt(m.index + m[0].length) + }, + message: `${m[0]} is all uppercase.`, + source: 'ex' + }; + if (hasDiagnosticRelatedInformationCapability) { + diagnostic.relatedInformation = [ + { + location: { + uri: textDocument.uri, + range: Object.assign({}, diagnostic.range) + }, + message: 'Spelling matters' + }, + { + location: { + uri: textDocument.uri, + range: Object.assign({}, diagnostic.range) + }, + message: 'Particularly for names' + } + ]; + } + diagnostics.push(diagnostic); + } + return diagnostics; +} + +connection.onDidChangeWatchedFiles(_change => { + // Monitored files have change in VSCode + connection.console.log('We received a file change event'); +}); + +// This handler provides the initial list of the completion items. +connection.onCompletion( + (_textDocumentPosition: TextDocumentPositionParams): CompletionItem[] => { + // The pass parameter contains the position of the text document in + // which code complete got requested. For the example we ignore this + // info and always provide the same completion items. + return [ + { + label: 'TypeScript', + kind: CompletionItemKind.Text, + data: 1 + }, + { + label: 'JavaScript', + kind: CompletionItemKind.Text, + data: 2 + } + ]; + } +); + +// This handler resolves additional information for the item selected in +// the completion list. +connection.onCompletionResolve( + (item: CompletionItem): CompletionItem => { + if (item.data === 1) { + item.detail = 'TypeScript details'; + item.documentation = 'TypeScript documentation'; + } else if (item.data === 2) { + item.detail = 'JavaScript details'; + item.documentation = 'JavaScript documentation'; + } + return item; + } +); + +// Make the text document manager listen on the connection +// for open, change and close text document events +documents.listen(connection); + +// Listen on the connection +connection.listen(); diff --git a/lsp/server/tsconfig.json b/lsp/server/tsconfig.json new file mode 100644 index 00000000..0627e485 --- /dev/null +++ b/lsp/server/tsconfig.json @@ -0,0 +1,21 @@ +{ + "compilerOptions": { + "target": "ES2024", + "lib": [ + "ES2024" + ], + "module": "commonjs", + "moduleResolution": "node", + "sourceMap": true, + "strict": true, + "outDir": "out", + "rootDir": "src" + }, + "include": [ + "src" + ], + "exclude": [ + "node_modules", + ".vscode-test" + ] +} \ No newline at end of file diff --git a/lsp/server/tsconfig.tsbuildinfo b/lsp/server/tsconfig.tsbuildinfo new file mode 100644 index 00000000..e1008e3e --- /dev/null +++ b/lsp/server/tsconfig.tsbuildinfo @@ -0,0 +1 @@ +{"root":["./src/server.ts"],"version":"5.9.2"} \ No newline at end of file diff --git a/lsp/tsconfig.json b/lsp/tsconfig.json new file mode 100644 index 00000000..af46f354 --- /dev/null +++ b/lsp/tsconfig.json @@ -0,0 +1,27 @@ +{ + "compilerOptions": { + "module": "commonjs", + "target": "ES2024", + "lib": [ + "ES2024" + ], + "outDir": "out", + "rootDir": "src", + "sourceMap": true + }, + "include": [ + "src" + ], + "exclude": [ + "node_modules", + ".vscode-test" + ], + "references": [ + { + "path": "./client" + }, + { + "path": "./server" + } + ] +} \ No newline at end of file From 374679d382f19dfae219c2a52faf69c32909899c Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 15 Apr 2026 23:19:50 -0400 Subject: [PATCH 37/60] Initial close.py --- packages/L1/src/L1/close.py | 117 ++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 packages/L1/src/L1/close.py diff --git a/packages/L1/src/L1/close.py b/packages/L1/src/L1/close.py new file mode 100644 index 00000000..1106fe8b --- /dev/null +++ b/packages/L1/src/L1/close.py @@ -0,0 +1,117 @@ +from functools import partial +from typing import Callable + +from L0 import syntax as L0 + +from . import syntax as L1 + + +def free_variables(term: L1.Statement) -> set[L1.Identifier]: + raise NotImplementedError() + + +def close_term( + statement: L1.Statement, + lift: Callable[[L0.Procedure], None], + fresh: Callable[[str], str], +) -> L0.Statement: + recur = partial(close_term, lift=lift, fresh=fresh) # noqa: F841 + + match statement: + case L1.Abstract(destination=destination, parameters=parameters, body=body, then=then): + # 1. Close the abstract / lift to top level + name = fresh("proc") + env_p = fresh("env") + + fvs = list(free_variables(body) - set(parameters)) + + result = recur(body) + for i, fv in enumerate(fvs): + body = L0.Load( + destination=fv, + base=env_p, + index=i, + then=result, + ) + + lift( + L0.Procedure( + name=name, + parameters=[*parameters, env_p], + body=result, + ) + ) + + # 2. Create the closure (tuple of code and environment) + env = fresh("env") + code = fresh("code") + result = L0.Address( + destination=code, + name=name, + then=L0.Allocate( + destination=destination, + count=2, + then=L0.Store( + base=destination, + index=0, + value=code, + then=L0.Store( + base=destination, + index=1, + value=env, + then=recur(then), + ), + ), + ), + ) + + for i, fv in enumerate(fvs): + result = L0.Store( + base=env, + index=i, + value=fv, + then=result, + ) + + L0.Allocate( + destination=env, + count=len(fvs), + then=result, + ) + + case L1.Apply(target=target, arguments=arguments): + # 1. Seperate code and environment from the closure + # 2. Call the code with the argument and environment + code = fresh("code") + env = fresh("env") + return L0.Load( + destination=code, + base=target, + index=0, + then=L0.Load( + destination=env, + base=target, + ), + ) + + +def close_program(program: L1.Program, fresh: Callable[[str], str]) -> L0.Program: + match program: + case L1.Program(parameters=parameters, body=body): + procedures = list[L0.Procedure]() + + body = close_term( + body, + procedures.append, + fresh, + ) + return L0.Program( + procedures=[ + *procedures, + L0.Procedure( + name="l0", + parameters=parameters, + body=body, + ), + ], + ) From e01e1dffd7bf7f61605a7cd657d7ab5169a2e4a6 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Wed, 15 Apr 2026 23:27:25 -0400 Subject: [PATCH 38/60] Implement match cases for L1.Copy, L1.Immediate, L1.Primitive, L1.Branch, L1.Allocate, L1.Load, L1.Store, and L1.Halt in close_term; add initial test file for close functionality --- packages/L1/src/L1/close.py | 23 +++++++++++++++++++++++ packages/L1/test/L1/test_close.py | 0 2 files changed, 23 insertions(+) create mode 100644 packages/L1/test/L1/test_close.py diff --git a/packages/L1/src/L1/close.py b/packages/L1/src/L1/close.py index 1106fe8b..e5ac4efd 100644 --- a/packages/L1/src/L1/close.py +++ b/packages/L1/src/L1/close.py @@ -18,6 +18,9 @@ def close_term( recur = partial(close_term, lift=lift, fresh=fresh) # noqa: F841 match statement: + case L1.Copy(): + pass + case L1.Abstract(destination=destination, parameters=parameters, body=body, then=then): # 1. Close the abstract / lift to top level name = fresh("proc") @@ -93,6 +96,26 @@ def close_term( base=target, ), ) + case L1.Immediate(): + pass + + case L1.Primitive(): + pass + + case L1.Branch(): + pass + + case L1.Allocate(): + pass + + case L1.Load(): + pass + + case L1.Store(): + pass + + case L1.Halt(): + pass def close_program(program: L1.Program, fresh: Callable[[str], str]) -> L0.Program: diff --git a/packages/L1/test/L1/test_close.py b/packages/L1/test/L1/test_close.py new file mode 100644 index 00000000..e69de29b From 6083f93b2c31f8b6a6af7068bf11f6e9aa20574a Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 24 Apr 2026 23:19:15 -0400 Subject: [PATCH 39/60] Implement free_variables and close_term functions for L1 syntax; add comprehensive tests for free variable analysis and closure conversion Co-authored-by: Copilot --- packages/L1/src/L1/close.py | 102 ++++++++++--- packages/L1/test/L1/test_close.py | 231 ++++++++++++++++++++++++++++++ 2 files changed, 313 insertions(+), 20 deletions(-) diff --git a/packages/L1/src/L1/close.py b/packages/L1/src/L1/close.py index e5ac4efd..7e657dc5 100644 --- a/packages/L1/src/L1/close.py +++ b/packages/L1/src/L1/close.py @@ -6,8 +6,30 @@ from . import syntax as L1 -def free_variables(term: L1.Statement) -> set[L1.Identifier]: - raise NotImplementedError() +def free_variables(statement: L1.Statement) -> set[L1.Identifier]: + match statement: + case L1.Copy(destination=destination, source=source, then=then): + return ({source} | free_variables(then)) - {destination} + case L1.Abstract(destination=destination, parameters=parameters, body=body, then=then): + return (free_variables(body) - set(parameters) | free_variables(then)) - {destination} + case L1.Apply(target=target, arguments=arguments): + return {target} | set(arguments) + case L1.Immediate(destination=destination, then=then): + return free_variables(then) - {destination} + case L1.Primitive(destination=destination, left=left, right=right, then=then): + return ({left, right} | free_variables(then)) - {destination} + case L1.Branch(left=left, right=right, then=then, otherwise=otherwise): + return {left, right} | free_variables(then) | free_variables(otherwise) + case L1.Allocate(destination=destination, then=then): + return free_variables(then) - {destination} + case L1.Load(destination=destination, base=base, then=then): + return {base} | free_variables(then) - {destination} + case L1.Store(base=base, value=value, then=then): + return {base, value} | free_variables(then) + case L1.Halt(value=value): + return {value} + case _: # pragma: no cover + return set() def close_term( @@ -18,8 +40,12 @@ def close_term( recur = partial(close_term, lift=lift, fresh=fresh) # noqa: F841 match statement: - case L1.Copy(): - pass + case L1.Copy(destination=destination, source=source, then=then): + return L0.Copy( + destination=destination, + source=source, + then=recur(then), + ) case L1.Abstract(destination=destination, parameters=parameters, body=body, then=then): # 1. Close the abstract / lift to top level @@ -30,7 +56,7 @@ def close_term( result = recur(body) for i, fv in enumerate(fvs): - body = L0.Load( + result = L0.Load( destination=fv, base=env_p, index=i, @@ -76,7 +102,7 @@ def close_term( then=result, ) - L0.Allocate( + return L0.Allocate( destination=env, count=len(fvs), then=result, @@ -94,28 +120,64 @@ def close_term( then=L0.Load( destination=env, base=target, + index=1, + then=L0.Call( + target=code, + arguments=[*arguments, env], + ), ), ) - case L1.Immediate(): - pass - case L1.Primitive(): - pass + case L1.Immediate(destination=destination, value=value, then=then): + return L0.Immediate( + destination=destination, + value=value, + then=recur(then), + ) - case L1.Branch(): - pass + case L1.Primitive(destination=destination, left=left, right=right, operator=operator, then=then): + return L0.Primitive( + destination=destination, + left=left, + right=right, + operator=operator, + then=recur(then), + ) - case L1.Allocate(): - pass + case L1.Branch(left=left, right=right, operator=operator, then=then, otherwise=otherwise): + return L0.Branch( + left=left, + right=right, + operator=operator, + then=recur(then), + otherwise=recur(otherwise), + ) + + case L1.Allocate(destination=destination, count=count, then=then): + return L0.Allocate( + destination=destination, + count=count, + then=recur(then), + ) - case L1.Load(): - pass + case L1.Load(destination=destination, base=base, index=index, then=then): + return L0.Load( + destination=destination, + base=base, + index=index, + then=recur(then), + ) - case L1.Store(): - pass + case L1.Store(base=base, index=index, value=value, then=then): + return L0.Store( + base=base, + index=index, + value=value, + then=recur(then), + ) - case L1.Halt(): - pass + case L1.Halt(value=value): # pragma: no branch + return L0.Halt(value=value) def close_program(program: L1.Program, fresh: Callable[[str], str]) -> L0.Program: diff --git a/packages/L1/test/L1/test_close.py b/packages/L1/test/L1/test_close.py index e69de29b..ad9b55cb 100644 --- a/packages/L1/test/L1/test_close.py +++ b/packages/L1/test/L1/test_close.py @@ -0,0 +1,231 @@ +from L0 import syntax as L0 +from L1 import syntax as L1 +from L1.close import close_program, close_term, free_variables +from util.sequential_name_generator import SequentialNameGenerator + + +def test_free_variables_copy(): + statement = L1.Copy( + destination="x", + source="y", + then=L1.Halt(value="x"), + ) + + assert free_variables(statement) == {"y"} + + +def test_free_variables_abstract(): + statement = L1.Abstract( + destination="f", + parameters=["x"], + body=L1.Primitive( + destination="t", + operator="+", + left="x", + right="z", + then=L1.Halt(value="t"), + ), + then=L1.Halt(value="f"), + ) + + assert free_variables(statement) == {"z"} + + +def test_free_variables_apply(): + statement = L1.Apply(target="f", arguments=["x", "y"]) + + assert free_variables(statement) == {"f", "x", "y"} + + +def test_free_variables_immediate(): + statement = L1.Immediate( + destination="x", + value=0, + then=L1.Halt(value="x"), + ) + + assert free_variables(statement) == set() + + +def test_free_variables_primitive(): + statement = L1.Primitive( + destination="x", + operator="+", + left="a", + right="b", + then=L1.Halt(value="x"), + ) + + assert free_variables(statement) == {"a", "b"} + + +def test_free_variables_branch(): + statement = L1.Branch( + operator="<", + left="a", + right="b", + then=L1.Halt(value="x"), + otherwise=L1.Halt(value="y"), + ) + + assert free_variables(statement) == {"a", "b", "x", "y"} + + +def test_free_variables_allocate(): + statement = L1.Allocate( + destination="p", + count=1, + then=L1.Halt(value="p"), + ) + + assert free_variables(statement) == set() + + +def test_free_variables_load(): + statement = L1.Load( + destination="x", + base="p", + index=0, + then=L1.Halt(value="x"), + ) + + assert free_variables(statement) == {"p"} + + +def test_free_variables_store(): + statement = L1.Store( + base="p", + index=0, + value="x", + then=L1.Halt(value="x"), + ) + + assert free_variables(statement) == {"p", "x"} + + +def test_free_variables_halt(): + statement = L1.Halt(value="x") + + assert free_variables(statement) == {"x"} + + +def test_close_term_non_abstract_forms(): + fresh = SequentialNameGenerator() + procedures: list[L0.Procedure] = [] + + statement = L1.Copy( + destination="x", + source="y", + then=L1.Immediate( + destination="z", + value=1, + then=L1.Primitive( + destination="w", + operator="+", + left="x", + right="z", + then=L1.Branch( + operator="<", + left="x", + right="w", + then=L1.Allocate( + destination="p", + count=1, + then=L1.Load( + destination="q", + base="p", + index=0, + then=L1.Store( + base="p", + index=0, + value="q", + then=L1.Halt(value="q"), + ), + ), + ), + otherwise=L1.Apply(target="f", arguments=["x"]), + ), + ), + ), + ) + + actual = close_term(statement, procedures.append, fresh) + + assert procedures == [] + assert isinstance(actual, L0.Copy) + assert isinstance(actual.then, L0.Immediate) + assert isinstance(actual.then.then, L0.Primitive) + assert isinstance(actual.then.then.then, L0.Branch) + assert isinstance(actual.then.then.then.then, L0.Allocate) + assert isinstance(actual.then.then.then.then.then, L0.Load) + assert isinstance(actual.then.then.then.then.then.then, L0.Store) + assert isinstance(actual.then.then.then.then.then.then.then, L0.Halt) + assert isinstance(actual.then.then.then.otherwise, L0.Load) + + +def test_close_term_abstract_lifts_and_builds_closure(): + fresh = SequentialNameGenerator() + procedures: list[L0.Procedure] = [] + + statement = L1.Abstract( + destination="f", + parameters=["x"], + body=L1.Primitive( + destination="y", + operator="+", + left="x", + right="z", + then=L1.Halt(value="y"), + ), + then=L1.Halt(value="f"), + ) + + actual = close_term(statement, procedures.append, fresh) + + assert len(procedures) == 1 + lifted = procedures[0] + + assert lifted.name == "proc0" + assert list(lifted.parameters) == ["x", "env0"] + assert isinstance(lifted.body, L0.Load) + assert lifted.body.destination == "z" + assert lifted.body.base == "env0" + assert lifted.body.index == 0 + assert isinstance(lifted.body.then, L0.Primitive) + assert isinstance(actual, L0.Allocate) + assert actual.destination == "env1" + + +def test_close_program_wraps_main_procedure(): + fresh = SequentialNameGenerator() + program = L1.Program( + parameters=["x"], + body=L1.Halt(value="x"), + ) + + actual = close_program(program, fresh) + + assert isinstance(actual, L0.Program) + assert len(actual.procedures) == 1 + assert actual.procedures[0].name == "l0" + assert list(actual.procedures[0].parameters) == ["x"] + assert isinstance(actual.procedures[0].body, L0.Halt) + + +def test_close_program_includes_lifted_procedures_before_main(): + fresh = SequentialNameGenerator() + program = L1.Program( + parameters=[], + body=L1.Abstract( + destination="f", + parameters=[], + body=L1.Halt(value="x"), + then=L1.Halt(value="f"), + ), + ) + + actual = close_program(program, fresh) + + assert len(actual.procedures) == 2 + assert actual.procedures[0].name.startswith("proc") + assert actual.procedures[1].name == "l0" From d741def3c2ee7b864ea43e1b3f7d8ab226855853 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Fri, 24 Apr 2026 23:30:34 -0400 Subject: [PATCH 40/60] Add pragma directive to close_program match case for clarity --- packages/L1/src/L1/close.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/packages/L1/src/L1/close.py b/packages/L1/src/L1/close.py index 7e657dc5..953915bd 100644 --- a/packages/L1/src/L1/close.py +++ b/packages/L1/src/L1/close.py @@ -182,7 +182,7 @@ def close_term( def close_program(program: L1.Program, fresh: Callable[[str], str]) -> L0.Program: match program: - case L1.Program(parameters=parameters, body=body): + case L1.Program(parameters=parameters, body=body): # pragma: no branch procedures = list[L0.Procedure]() body = close_term( From 20915ce2f110261bfdc3495fe6036338ea7f49b5 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Sun, 26 Apr 2026 21:41:01 -0400 Subject: [PATCH 41/60] Add L4 package with initial syntax, check, and elaborate implementations based on in class example. --- packages/L4/pyproject.toml | 8 ++ packages/L4/src/L4/__init__.py | 0 packages/L4/src/L4/check.py | 181 ++++++++++++++++++++++++++++++++ packages/L4/src/L4/elaborate.py | 132 +++++++++++++++++++++++ packages/L4/src/L4/syntax.py | 156 +++++++++++++++++++++++++++ pyproject.toml | 1 + uv.lock | 1 + 7 files changed, 479 insertions(+) create mode 100644 packages/L4/pyproject.toml create mode 100644 packages/L4/src/L4/__init__.py create mode 100644 packages/L4/src/L4/check.py create mode 100644 packages/L4/src/L4/elaborate.py create mode 100644 packages/L4/src/L4/syntax.py diff --git a/packages/L4/pyproject.toml b/packages/L4/pyproject.toml new file mode 100644 index 00000000..1acce68c --- /dev/null +++ b/packages/L4/pyproject.toml @@ -0,0 +1,8 @@ +[project] +name = "L4" +version = "0.1.0" +description = "Add your description here" +readme = "README.md" +authors = [{ name = "James Clause", email = "clause@udel.edu" }] +requires-python = ">=3.14" +dependencies = ["pydantic>=2.12.3", "util"] diff --git a/packages/L4/src/L4/__init__.py b/packages/L4/src/L4/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/packages/L4/src/L4/check.py b/packages/L4/src/L4/check.py new file mode 100644 index 00000000..62b3d7d8 --- /dev/null +++ b/packages/L4/src/L4/check.py @@ -0,0 +1,181 @@ +from collections.abc import Mapping +from functools import partial + +from .syntax import ( + Abstraction, + And, + Application, + Arrow, + Bool, + Boolean, + Branch, + Identifier, + If, + Immediate, + Int, + Join, + Primitive, + Product, + Program, + Project, + Reference, + Sole, + Term, + Trivial, + Tuple, + TupleGet, + Type, +) + + +def equivalent( + t1: Type, + t2: Type, +) -> bool: + recur = partial(equivalent) + + match t1, t2: + case Arrow(domain=d1, codomain=c1), Arrow(domain=d2, codomain=c2): + return ( + recur(d1, d2) # domain + and recur(c1, c2) # codomain + ) + + case Int(), Int(): + return True + + case Bool(), Bool(): + return True + + case Trivial(), Trivial(): + return True + + case Product(components=cs1), Product(components=cs2): + return ( + len(cs1) == len(cs2) # + and all(recur(c1, c2) for c1, c2 in zip(cs1, cs2)) # + ) + + case _: + return False + + +def check_term( + term: Term, + expected: Type, + gamma: Mapping[Identifier, Type], +) -> Type: + infer = partial(infer_term, gamma=gamma) + + actual = infer(term) + if not equivalent(actual, expected): + raise ValueError() + + return actual + + +def infer_term( + term: Term, + gamma: Mapping[Identifier, Type], +) -> Type: + _infer = partial(infer_term, gamma=gamma) + _check = partial(check_term, gamma=gamma) + + match term: + case Reference(name=name): + match gamma.get(name): + case None: + raise ValueError(f"unknown variable: {name}") + + case type: + return type + + case Abstraction(parameter=parameter, domain=domain, body=body): + return Arrow( + domain=domain, + codomain=_infer(body, gamma={**gamma, parameter: domain}), + ) + + case Application(target=target, argument=argument): + match _infer(target): + case Arrow(domain=domain, codomain=codomain): + _check(argument, domain) + return codomain + + case target_type: + raise ValueError(f"expected {target} to be {Arrow} not {target_type}") + + case Immediate(): + return Int() + + case Boolean(): + return Bool() + + case Primitive(operator=operator, left=left, right=right): + match operator: + case "+" | "-" | "*": + _check(left, Int()) + _check(right, Int()) + return Int() + + case Branch( + operator=operator, left=left, right=right, motive=motive, consequent=consequent, otherwise=otherwise + ): + match operator: + case "<" | "==": + _check(left, Int()) + _check(right, Int()) + _check(consequent, motive) + _check(otherwise, motive) + return motive + + case If(test=test, consequent=consequent, otherwise=otherwise): + _check(test, Bool()) + consequent_type = _infer(consequent) + otherwise_type = _infer(otherwise) + if not equivalent(consequent_type, otherwise_type): + raise ValueError(f"branches have different types: {consequent_type} and {otherwise_type}") + return consequent_type + + case And(left=left, right=right): + _check(left, Bool()) + _check(right, Bool()) + return Bool() + + case Sole(): + return Trivial() + + case Tuple(components=components): + return Product(components=[_infer(component) for component in components]) + + case TupleGet(target=target, index=index): + match _infer(target): + case Product(components=components): + if index not in range(len(components)): + raise ValueError(f"invalid index: {index} in {components}") + return components[index] + + case target_type: + raise ValueError(f"expected {target} to be {Product} not {target_type}") + + case Join(components=components): + return Product(components=[_infer(component) for component in components]) + + case Project(target=target, index=index): + match _infer(target): + case Product(components=components): + if index not in range(len(components)): + raise ValueError(f"invalid index: {index} in {components}") + + return components[index] + + case target_type: + raise ValueError(f"expected {target} to be {Product} not {target_type}") + + +def check_program( + program: Program, +) -> None: + match program: + case Program(parameters=parameters, body=body): # pragma: no branch + check_term(body, Int(), dict.fromkeys(parameters, Int())) diff --git a/packages/L4/src/L4/elaborate.py b/packages/L4/src/L4/elaborate.py new file mode 100644 index 00000000..e0348ad6 --- /dev/null +++ b/packages/L4/src/L4/elaborate.py @@ -0,0 +1,132 @@ +from collections.abc import Callable +from functools import partial + +from L3 import syntax as L3 +from util.sequential_name_generator import SequentialNameGenerator + +from . import syntax as L4 + +type FreshFunc = Callable[[str], str] + + +def elaborate_term(term: L4.Term, fresh: FreshFunc) -> L3.Term: + recur = partial(elaborate_term, fresh=fresh) + + match term: + case L4.Reference(name=name): + return L3.Reference(name=name) + + case L4.Abstraction(parameter=parameter, domain=_domain, body=body): + return L3.Abstract( + parameters=[parameter], + body=recur(body), + ) + + case L4.Application(target=target, argument=argument): + return L3.Apply( + target=recur(target), + arguments=[recur(argument)], + ) + + case L4.Boolean(value=value): + return L3.Immediate(value=1 if value else 0) + + case L4.If(test=test, consequent=consequent, otherwise=otherwise): + test_name = fresh("if") + return L3.Let( + bindings=[(test_name, recur(test))], + body=L3.Branch( + operator="==", + left=L3.Reference(name=test_name), + right=L3.Immediate(value=1), + consequent=recur(consequent), + otherwise=recur(otherwise), + ), + ) + + case L4.And(left=left, right=right): + left_name = fresh("and") + return L3.Let( + bindings=[(left_name, recur(left))], + body=L3.Branch( + operator="==", + left=L3.Reference(name=left_name), + right=L3.Immediate(value=1), + consequent=recur(right), + otherwise=L3.Immediate(value=0), + ), + ) + + case L4.Immediate(value=value): + return L3.Immediate(value=value) + + case L4.Primitive(operator=operator, left=left, right=right): + return L3.Primitive( + operator=operator, + left=recur(left), + right=recur(right), + ) + + case L4.Branch( + operator=operator, left=left, right=right, motive=_motive, consequent=consequent, otherwise=otherwise + ): + return L3.Branch( + operator=operator, + left=recur(left), + right=recur(right), + consequent=recur(consequent), + otherwise=recur(otherwise), + ) + + case L4.Sole(): + return L3.Immediate(value=0) + + case L4.Tuple(components=components): + tuple_name = fresh("tuple") + return L3.Let( + bindings=[(tuple_name, L3.Allocate(count=len(components)))], + body=L3.Begin( + effects=[ + L3.Store( + base=L3.Reference(name=tuple_name), + index=index, + value=recur(component), + ) + for index, component in enumerate(components) + ], + value=L3.Reference(name=tuple_name), + ), + ) + + case L4.TupleGet(target=target, index=index): + tuple_name = fresh("tuple") + return L3.Let( + bindings=[(tuple_name, recur(target))], + body=L3.Load( + base=L3.Reference(name=tuple_name), + index=index, + ), + ) + + case L4.Join(components=components): + return recur(L4.Tuple(components=components)) + + case L4.Project(target=target, index=index): + return recur(L4.TupleGet(target=target, index=index)) + + case _: + raise ValueError(f"unknown term for L4 elaboration: {term}") + + +def elaborate_program(program: L4.Program, fresh: FreshFunc | None = None) -> L3.Program: + fresh = fresh or SequentialNameGenerator() + + match program: + case L4.Program(parameters=parameters, body=body): + return L3.Program( + parameters=parameters, + body=elaborate_term(body, fresh), + ) + + case _: + raise ValueError(f"unknown program for L4 elaboration: {program}") diff --git a/packages/L4/src/L4/syntax.py b/packages/L4/src/L4/syntax.py new file mode 100644 index 00000000..f8fdb7ce --- /dev/null +++ b/packages/L4/src/L4/syntax.py @@ -0,0 +1,156 @@ +from collections.abc import Sequence +from typing import Annotated, Literal + +from pydantic import BaseModel, Field + +type Identifier = Annotated[str, Field(min_length=1)] +type Label = Annotated[str, Field(min_length=1)] +type Nat = Annotated[int, Field(ge=0)] + + +class Program(BaseModel, frozen=True): + tag: Literal["program"] = "program" + parameters: Sequence[Identifier] + body: Term + + +type Type = Annotated[ + Arrow | Int | Bool | Trivial | Product, + Field(discriminator="tag"), +] + + +class Arrow(BaseModel, frozen=True): + tag: Literal["arrow"] = "arrow" + domain: Type + codomain: Type + + +class Int(BaseModel, frozen=True): + tag: Literal["int"] = "int" + + +class Bool(BaseModel, frozen=True): + tag: Literal["bool"] = "bool" + + +class Trivial(BaseModel, frozen=True): + tag: Literal["trivial"] = "trivial" + + +class Product(BaseModel, frozen=True): + tag: Literal["product"] = "product" + components: Sequence[Type] + + +type Term = Annotated[ + # Lambda + Reference + | Abstraction + | Application + # Bool + | Boolean + | If + | And + # Int + | Immediate + | Primitive + | Branch + # Trivial + | Sole + # Product + | Tuple + | TupleGet + | Join + | Project, + Field(discriminator="tag"), +] + + +class Reference(BaseModel, frozen=True): + tag: Literal["reference"] = "reference" + name: Identifier + + +class Abstraction(BaseModel, frozen=True): + tag: Literal["abstraction"] = "abstraction" + parameter: Identifier + domain: Type + body: Term + + +class Application(BaseModel, frozen=True): + tag: Literal["application"] = "application" + target: Term + argument: Term + + +class Boolean(BaseModel, frozen=True): + tag: Literal["boolean"] = "boolean" + value: bool + + +class If(BaseModel, frozen=True): + tag: Literal["if"] = "if" + test: Term + consequent: Term + otherwise: Term + + +class And(BaseModel, frozen=True): + tag: Literal["and"] = "and" + left: Term + right: Term + + +class Immediate(BaseModel, frozen=True): + tag: Literal["immediate"] = "immediate" + value: int + + +class Primitive(BaseModel, frozen=True): + tag: Literal["primitive"] = "primitive" + operator: Literal["+", "-", "*"] + left: Term + right: Term + + +class Branch(BaseModel, frozen=True): + tag: Literal["branch"] = "branch" + operator: Literal["<", "=="] + left: Term + right: Term + motive: Type + consequent: Term + otherwise: Term + + +class Sole(BaseModel, frozen=True): + tag: Literal["sole"] = "sole" + + +class Successor(BaseModel, frozen=True): + tag: Literal["successor"] = "successor" + target: Term + + +class Tuple(BaseModel, frozen=True): + tag: Literal["tuple"] = "tuple" + components: Sequence[Term] + + +class TupleGet(BaseModel, frozen=True): + tag: Literal["tuple_get"] = "tuple_get" + target: Term + index: Nat + + +class Join(BaseModel, frozen=True): + tag: Literal["join"] = "join" + components: Sequence[Term] + + +class Project(BaseModel, frozen=True): + tag: Literal["project"] = "project" + target: Term + index: Annotated[int, Field(ge=0)] diff --git a/pyproject.toml b/pyproject.toml index d7353169..333670e3 100644 --- a/pyproject.toml +++ b/pyproject.toml @@ -26,6 +26,7 @@ members = ["packages/*"] [tool.uv.sources] util = { workspace = true } +l4 = { workspace = true } l3 = { workspace = true } l2 = { workspace = true } l1 = { workspace = true } diff --git a/uv.lock b/uv.lock index b1e5469e..df873050 100644 --- a/uv.lock +++ b/uv.lock @@ -9,6 +9,7 @@ members = [ "l1", "l2", "l3", + "l4", "util", ] From 2f197402882dce74125b0243d532e07d296e6f8e Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Mon, 27 Apr 2026 00:24:36 -0400 Subject: [PATCH 42/60] Added some inital diagnostics to L3 and integrated it with the LSP. Passing tests, but have not done any practical tests with the vscode extension. Co-authored-by: Copilot --- lsp/client/src/test/index.ts | 4 +- lsp/client/tsconfig.tsbuildinfo | 2 +- lsp/server/src/server.ts | 265 ++++++++++++++++++++---- lsp/server/tsconfig.json | 1 - packages/L3/src/L3/diagnostics.py | 170 +++++++++++++++ packages/L3/src/L3/main.py | 17 +- packages/L3/test/L3/test_diagnostics.py | 35 ++++ uv.lock | 15 ++ 8 files changed, 466 insertions(+), 43 deletions(-) create mode 100644 packages/L3/src/L3/diagnostics.py create mode 100644 packages/L3/test/L3/test_diagnostics.py diff --git a/lsp/client/src/test/index.ts b/lsp/client/src/test/index.ts index eb59605b..ee3de701 100644 --- a/lsp/client/src/test/index.ts +++ b/lsp/client/src/test/index.ts @@ -3,7 +3,7 @@ * Licensed under the MIT License. See License.txt in the project root for license information. * ------------------------------------------------------------------------------------------ */ import * as path from 'path'; -import Mocha from 'mocha'; +import Mocha = require('mocha'); import { glob } from 'glob'; export function run(): Promise { @@ -24,7 +24,7 @@ export function run(): Promise { try { // Run the mocha test await new Promise((resolve, reject) => { - mocha.run(failures => { + mocha.run((failures: number) => { if (failures > 0) { reject(`${failures} tests failed.`); } else { diff --git a/lsp/client/tsconfig.tsbuildinfo b/lsp/client/tsconfig.tsbuildinfo index c391fc8f..de3d3b31 100644 --- a/lsp/client/tsconfig.tsbuildinfo +++ b/lsp/client/tsconfig.tsbuildinfo @@ -1 +1 @@ -{"root":["./src/extension.ts","./src/test/completion.test.ts","./src/test/diagnostics.test.ts","./src/test/helper.ts","./src/test/index.ts","./src/test/runtest.ts"],"errors":true,"version":"5.9.2"} \ No newline at end of file +{"root":["./src/extension.ts","./src/test/completion.test.ts","./src/test/diagnostics.test.ts","./src/test/helper.ts","./src/test/index.ts","./src/test/runtest.ts"],"version":"5.9.2"} \ No newline at end of file diff --git a/lsp/server/src/server.ts b/lsp/server/src/server.ts index 73ddc891..9301e1c0 100644 --- a/lsp/server/src/server.ts +++ b/lsp/server/src/server.ts @@ -14,11 +14,20 @@ import { DocumentDiagnosticReportKind, type DocumentDiagnosticReport } from 'vscode-languageserver/node'; +import { execFile } from 'node:child_process'; +import { existsSync } from 'node:fs'; +import { mkdtemp, rm, writeFile } from 'node:fs/promises'; +import { tmpdir } from 'node:os'; +import { dirname, join } from 'node:path'; +import { fileURLToPath } from 'node:url'; +import { promisify } from 'node:util'; import { TextDocument } from 'vscode-languageserver-textdocument'; +const execFileAsync = promisify(execFile); + // Create a connection for the server, using Node's IPC as a transport. // Also include all preview / proposed LSP features. const connection = createConnection(ProposedFeatures.all); @@ -29,9 +38,34 @@ const documents = new TextDocuments(TextDocument); let hasConfigurationCapability = false; let hasWorkspaceFolderCapability = false; let hasDiagnosticRelatedInformationCapability = false; +let workspaceRootPath: string | undefined; + +interface L3Diagnostic { + stage: 'syntax' | 'semantic' | 'internal'; + severity: 'error' | 'warning' | 'information'; + code: string; + message: string; + line?: number; + column?: number; + end_line?: number; + end_column?: number; + snippet?: string; +} + +interface L3DiagnosticsReport { + ok: boolean; + diagnostics: L3Diagnostic[]; +} + +interface ExecFailure { + code?: string | number; + stdout?: string; + stderr?: string; +} connection.onInitialize((params: InitializeParams) => { const capabilities = params.capabilities; + workspaceRootPath = extractWorkspaceRootPath(params); // Does the client support the `workspace/configuration` request? // If not, we fall back using global settings. @@ -129,6 +163,7 @@ function getDocumentSettings(resource: string): Thenable { // Only keep settings for open documents documents.onDidClose(e => { documentSettings.delete(e.document.uri); + connection.sendDiagnostics({ uri: e.document.uri, diagnostics: [] }); }); @@ -152,52 +187,206 @@ connection.languages.diagnostics.on(async (params) => { // The content of a text document has changed. This event is emitted // when the text document first opened or when its content has changed. documents.onDidChangeContent(change => { - validateTextDocument(change.document); + void publishDiagnostics(change.document); +}); + +documents.onDidOpen(event => { + void publishDiagnostics(event.document); }); +async function publishDiagnostics(textDocument: TextDocument): Promise { + const diagnostics = await validateTextDocument(textDocument); + connection.sendDiagnostics({ uri: textDocument.uri, diagnostics }); +} + +function extractWorkspaceRootPath(params: InitializeParams): string | undefined { + const workspaceFolderUri = params.workspaceFolders && params.workspaceFolders.length > 0 + ? params.workspaceFolders[0].uri + : undefined; + const rootUri = workspaceFolderUri ?? params.rootUri ?? undefined; + if (!rootUri || !rootUri.startsWith('file://')) { + return undefined; + } + + try { + return fileURLToPath(rootUri); + } catch { + return undefined; + } +} + +function toFilePath(uri: string): string { + if (!uri.startsWith('file://')) { + throw new Error(`Unsupported URI scheme: ${uri}`); + } + return fileURLToPath(uri); +} + +function toSeverity(severity: L3Diagnostic['severity']): DiagnosticSeverity { + switch (severity) { + case 'warning': + return DiagnosticSeverity.Warning; + case 'information': + return DiagnosticSeverity.Information; + default: + return DiagnosticSeverity.Error; + } +} + +function toPosition(value: number | undefined): number { + if (typeof value !== 'number' || Number.isNaN(value)) { + return 0; + } + return Math.max(0, value - 1); +} + +function toLspDiagnostic(uri: string, diagnostic: L3Diagnostic): Diagnostic { + const startLine = toPosition(diagnostic.line); + const startCharacter = toPosition(diagnostic.column); + const endLine = typeof diagnostic.end_line === 'number' ? toPosition(diagnostic.end_line) : startLine; + const endCharacter = typeof diagnostic.end_column === 'number' + ? toPosition(diagnostic.end_column) + : startCharacter + 1; + + const lspDiagnostic: Diagnostic = { + severity: toSeverity(diagnostic.severity), + range: { + start: { line: startLine, character: startCharacter }, + end: { line: endLine, character: Math.max(endCharacter, startCharacter + 1) } + }, + message: diagnostic.message, + source: 'l3', + code: diagnostic.code + }; + + if (hasDiagnosticRelatedInformationCapability && diagnostic.snippet) { + lspDiagnostic.relatedInformation = [ + { + location: { + uri, + range: lspDiagnostic.range + }, + message: `Source: ${diagnostic.snippet}` + } + ]; + } + + return lspDiagnostic; +} + +async function createTempL3File(text: string): Promise<{ dirPath: string; filePath: string }> { + const dirPath = await mkdtemp(join(tmpdir(), 'l3-lsp-')); + const filePath = join(dirPath, 'document.l3'); + await writeFile(filePath, text, 'utf8'); + return { dirPath, filePath }; +} + +async function runL3Diagnostics(filePath: string): Promise { + const workingDirectory = workspaceRootPath ?? dirname(filePath); + const commandCandidates: Array<{ command: string; args: string[] }> = []; + + if (workspaceRootPath) { + const venvL3 = join(workspaceRootPath, '.venv', 'bin', 'l3'); + if (existsSync(venvL3)) { + commandCandidates.push({ command: venvL3, args: ['--diagnostics-json', filePath] }); + } + + const venvPython = join(workspaceRootPath, '.venv', 'bin', 'python'); + if (existsSync(venvPython)) { + commandCandidates.push({ command: venvPython, args: ['-m', 'L3.main', '--diagnostics-json', filePath] }); + } + } + + commandCandidates.push({ command: 'l3', args: ['--diagnostics-json', filePath] }); + commandCandidates.push({ command: 'python3', args: ['-m', 'L3.main', '--diagnostics-json', filePath] }); + + let lastError = ''; + + for (const candidate of commandCandidates) { + try { + const result = await execFileAsync(candidate.command, candidate.args, { cwd: workingDirectory }); + const parsed = JSON.parse(result.stdout) as L3DiagnosticsReport; + if (Array.isArray(parsed.diagnostics)) { + return parsed; + } + lastError = `Invalid diagnostics JSON from ${candidate.command}`; + } catch (error) { + const failure = error as ExecFailure; + if (failure.code === 'ENOENT') { + continue; + } + + const stdout = typeof failure.stdout === 'string' ? failure.stdout : ''; + if (stdout.trim().length > 0) { + try { + const parsed = JSON.parse(stdout) as L3DiagnosticsReport; + if (Array.isArray(parsed.diagnostics)) { + return parsed; + } + lastError = `Invalid diagnostics JSON from ${candidate.command}`; + continue; + } catch { + lastError = stdout.trim(); + continue; + } + } + + lastError = typeof failure.stderr === 'string' && failure.stderr.trim().length > 0 + ? failure.stderr.trim() + : `Failed to run ${candidate.command}`; + } + } + + return { + ok: false, + diagnostics: [ + { + stage: 'internal', + severity: 'error', + code: 'L3_DIAGNOSTICS_UNAVAILABLE', + message: lastError || 'Could not execute L3 diagnostics command.' + } + ] + }; +} + async function validateTextDocument(textDocument: TextDocument): Promise { - // In this simple example we get the settings for every validate run. + if (!textDocument.uri.endsWith('.l3')) { + return []; + } + + // In this example we get the settings for every validate run. const settings = await getDocumentSettings(textDocument.uri); - // The validator creates diagnostics for all uppercase words length 2 and more - const text = textDocument.getText(); - const pattern = /\b[A-Z]{2,}\b/g; - let m: RegExpExecArray | null; - - let problems = 0; - const diagnostics: Diagnostic[] = []; - while ((m = pattern.exec(text)) && problems < settings.maxNumberOfProblems) { - problems++; - const diagnostic: Diagnostic = { - severity: DiagnosticSeverity.Warning, - range: { - start: textDocument.positionAt(m.index), - end: textDocument.positionAt(m.index + m[0].length) - }, - message: `${m[0]} is all uppercase.`, - source: 'ex' - }; - if (hasDiagnosticRelatedInformationCapability) { - diagnostic.relatedInformation = [ - { - location: { - uri: textDocument.uri, - range: Object.assign({}, diagnostic.range) - }, - message: 'Spelling matters' + let tempDirPath: string | undefined; + try { + toFilePath(textDocument.uri); + const temp = await createTempL3File(textDocument.getText()); + tempDirPath = temp.dirPath; + + const report = await runL3Diagnostics(temp.filePath); + return report.diagnostics + .slice(0, settings.maxNumberOfProblems) + .map(diagnostic => toLspDiagnostic(textDocument.uri, diagnostic)); + } catch (error) { + const message = error instanceof Error ? error.message : 'Unknown diagnostics error'; + return [ + { + severity: DiagnosticSeverity.Error, + range: { + start: { line: 0, character: 0 }, + end: { line: 0, character: 1 } }, - { - location: { - uri: textDocument.uri, - range: Object.assign({}, diagnostic.range) - }, - message: 'Particularly for names' - } - ]; + message, + source: 'l3', + code: 'L3_DIAGNOSTICS_RUNTIME_ERROR' + } + ]; + } finally { + if (tempDirPath) { + await rm(tempDirPath, { recursive: true, force: true }); } - diagnostics.push(diagnostic); } - return diagnostics; } connection.onDidChangeWatchedFiles(_change => { diff --git a/lsp/server/tsconfig.json b/lsp/server/tsconfig.json index 0627e485..e0e47954 100644 --- a/lsp/server/tsconfig.json +++ b/lsp/server/tsconfig.json @@ -5,7 +5,6 @@ "ES2024" ], "module": "commonjs", - "moduleResolution": "node", "sourceMap": true, "strict": true, "outDir": "out", diff --git a/packages/L3/src/L3/diagnostics.py b/packages/L3/src/L3/diagnostics.py new file mode 100644 index 00000000..75584b82 --- /dev/null +++ b/packages/L3/src/L3/diagnostics.py @@ -0,0 +1,170 @@ +from __future__ import annotations + +import re +from collections.abc import Sequence +from pathlib import Path +from typing import Literal + +from lark import UnexpectedInput +from pydantic import BaseModel + +from .check import check_program +from .parse import parse_program + +type DiagnosticStage = Literal["syntax", "semantic", "internal"] +type DiagnosticSeverity = Literal["error", "warning", "information"] + + +class Diagnostic(BaseModel, frozen=True): + stage: DiagnosticStage + severity: DiagnosticSeverity = "error" + code: str + message: str + line: int | None = None + column: int | None = None + end_line: int | None = None + end_column: int | None = None + snippet: str | None = None + + +class DiagnosticsReport(BaseModel, frozen=True): + ok: bool + diagnostics: Sequence[Diagnostic] + + +def _line_snippet(source: str, line: int | None) -> str | None: + if line is None: + return None + + lines = source.splitlines() + if line < 1 or line > len(lines): + return None + + return lines[line - 1] + + +def _position_for_identifier(source: str, identifier: str) -> tuple[int, int] | None: + pattern = re.compile(rf"\b{re.escape(identifier)}\b") + match = pattern.search(source) + if match is None: + return None + + before = source[: match.start()] + line = before.count("\n") + 1 + if "\n" in before: + column = len(before.rsplit("\n", maxsplit=1)[-1]) + 1 + else: + column = len(before) + 1 + + return line, column + + +def _identifier_from_message(message: str) -> str | None: + unbound = re.search(r"Unbound variable:\s*([A-Za-z_][A-Za-z0-9_]*)", message) + if unbound: + return unbound.group(1) + + duplicate = re.search(r"Duplicate (?:bindings|parameters):\s*(.+)$", message) + if duplicate is None: + return None + + names = re.findall(r"[A-Za-z_][A-Za-z0-9_]*", duplicate.group(1)) + if not names: + return None + + return names[0] + + +def _normalize_error_position(source: str, line: int | None, column: int | None) -> tuple[int, int]: + if isinstance(line, int) and isinstance(column, int) and line > 0 and column > 0: + return line, column + + lines = source.splitlines() + if not lines: + return 1, 1 + + last_line_number = len(lines) + last_column = len(lines[-1]) + 1 + return last_line_number, last_column + + +def _syntax_diagnostic(source: str, error: UnexpectedInput) -> Diagnostic: + expected = sorted(getattr(error, "expected", [])) + expected_message = "" + if expected: + expected_message = f" Expected one of: {', '.join(expected)}." + + line, column = _normalize_error_position( + source, + getattr(error, "line", None), + getattr(error, "column", None), + ) + + return Diagnostic( + stage="syntax", + code="L3_SYNTAX_ERROR", + message=f"{str(error).strip()}.{expected_message}", + line=line, + column=column, + end_line=line, + end_column=column + 1, + snippet=_line_snippet(source, line), + ) + + +def _semantic_diagnostic(source: str, message: str) -> Diagnostic: + identifier = _identifier_from_message(message) + position = _position_for_identifier(source, identifier) if identifier else None + + line: int | None = None + column: int | None = None + end_column: int | None = None + + if position is not None: + line, column = position + end_column = column + len(identifier) if identifier else None + + code = "L3_SEMANTIC_ERROR" + if message.startswith("Unbound variable"): + code = "L3_UNBOUND_VARIABLE" + elif message.startswith("Duplicate bindings"): + code = "L3_DUPLICATE_BINDINGS" + elif message.startswith("Duplicate parameters"): + code = "L3_DUPLICATE_PARAMETERS" + + return Diagnostic( + stage="semantic", + code=code, + message=message, + line=line, + column=column, + end_line=line, + end_column=end_column, + snippet=_line_snippet(source, line), + ) + + +def analyze_source(source: str) -> DiagnosticsReport: + try: + program = parse_program(source) + check_program(program) + return DiagnosticsReport(ok=True, diagnostics=[]) + except UnexpectedInput as error: + return DiagnosticsReport(ok=False, diagnostics=[_syntax_diagnostic(source, error)]) + except ValueError as error: + return DiagnosticsReport(ok=False, diagnostics=[_semantic_diagnostic(source, str(error))]) + except Exception as error: # pragma: no cover + return DiagnosticsReport( + ok=False, + diagnostics=[ + Diagnostic( + stage="internal", + code="L3_INTERNAL_ERROR", + message=str(error), + ) + ], + ) + + +def analyze_file(path: Path) -> DiagnosticsReport: + return analyze_source(path.read_text()) diff --git a/packages/L3/src/L3/main.py b/packages/L3/src/L3/main.py index d623913a..99d26569 100644 --- a/packages/L3/src/L3/main.py +++ b/packages/L3/src/L3/main.py @@ -7,6 +7,7 @@ from L2.to_python import to_ast_program from .check import check_program +from .diagnostics import analyze_source from .eliminate_letrec import eliminate_letrec_program from .parse import parse_program from .uniqify import uniqify_program @@ -18,6 +19,12 @@ max_content_width=120, ), ) +@click.option( + "--diagnostics-json", + is_flag=True, + default=False, + help="Emit parser/checker diagnostics as JSON for editor integrations", +) @click.option( "--check/--no-check", default=True, @@ -43,11 +50,19 @@ ) def main( output: Path | None, + diagnostics_json: bool, check: bool, optimize: bool, input: Path, ) -> None: - l3 = parse_program(input.read_text()) + source = input.read_text() + + if diagnostics_json: + report = analyze_source(source) + click.echo(report.model_dump_json(indent=2)) + raise SystemExit(0 if report.ok else 1) + + l3 = parse_program(source) if check: check_program(l3) diff --git a/packages/L3/test/L3/test_diagnostics.py b/packages/L3/test/L3/test_diagnostics.py new file mode 100644 index 00000000..26589b7e --- /dev/null +++ b/packages/L3/test/L3/test_diagnostics.py @@ -0,0 +1,35 @@ +from L3.diagnostics import analyze_source + + +def test_diagnostics_ok_program() -> None: + report = analyze_source("(l3 (x) x)") + + assert report.ok is True + assert report.diagnostics == [] + + +def test_diagnostics_reports_syntax_error() -> None: + report = analyze_source("(l3 (x) x") + + assert report.ok is False + assert len(report.diagnostics) == 1 + diagnostic = report.diagnostics[0] + + assert diagnostic.stage == "syntax" + assert diagnostic.code == "L3_SYNTAX_ERROR" + assert diagnostic.line == 1 + assert diagnostic.column is not None + + +def test_diagnostics_reports_unbound_variable() -> None: + report = analyze_source("(l3 () x)") + + assert report.ok is False + assert len(report.diagnostics) == 1 + diagnostic = report.diagnostics[0] + + assert diagnostic.stage == "semantic" + assert diagnostic.code == "L3_UNBOUND_VARIABLE" + assert diagnostic.line == 1 + assert diagnostic.column is not None + assert diagnostic.message == "Unbound variable: x" diff --git a/uv.lock b/uv.lock index df873050..b332fd18 100644 --- a/uv.lock +++ b/uv.lock @@ -228,6 +228,21 @@ requires-dist = [ { name = "util", editable = "packages/util" }, ] +[[package]] +name = "l4" +version = "0.1.0" +source = { editable = "packages/L4" } +dependencies = [ + { name = "pydantic" }, + { name = "util" }, +] + +[package.metadata] +requires-dist = [ + { name = "pydantic", specifier = ">=2.12.3" }, + { name = "util", editable = "packages/util" }, +] + [[package]] name = "lark" version = "1.3.1" From e67d3f2677d302e9d1f3d9c2be27111dd5b6a914 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Tue, 28 Apr 2026 16:00:31 -0400 Subject: [PATCH 43/60] Add .gitignore and initial L4 example files for Lambda and test cases --- lsp/.gitignore | 17 +++++++++++++++++ packages/L4/examples/class.l4 | 1 + packages/L4/examples/test.l4 | 4 ++++ 3 files changed, 22 insertions(+) create mode 100644 lsp/.gitignore create mode 100644 packages/L4/examples/class.l4 create mode 100644 packages/L4/examples/test.l4 diff --git a/lsp/.gitignore b/lsp/.gitignore new file mode 100644 index 00000000..4667f3f1 --- /dev/null +++ b/lsp/.gitignore @@ -0,0 +1,17 @@ +# Node dependencies +node_modules/ + +# TypeScript build output +out/ +dist/ +build/ +*.tsbuildinfo + +# Test and coverage output +coverage/ +.vscode-test/ + +# Local environment and editor files +.env +.env.* +.DS_Store diff --git a/packages/L4/examples/class.l4 b/packages/L4/examples/class.l4 new file mode 100644 index 00000000..a994f636 --- /dev/null +++ b/packages/L4/examples/class.l4 @@ -0,0 +1 @@ +(Lambda (x: Int) (lambda (y: Int) (if (> (+xy) 0) Int 1 0))) \ No newline at end of file diff --git a/packages/L4/examples/test.l4 b/packages/L4/examples/test.l4 new file mode 100644 index 00000000..d5fbc306 --- /dev/null +++ b/packages/L4/examples/test.l4 @@ -0,0 +1,4 @@ +(the + (-> Int (-> Int Int)) + (lambda (x) (lambda (y) (if (> (+ x y) 0) 1 0))) +) \ No newline at end of file From be06c79ff585bac6f338158503f3ef59fcd385ee Mon Sep 17 00:00:00 2001 From: nolanKeefe Date: Sun, 3 May 2026 23:54:46 -0400 Subject: [PATCH 44/60] Mild changes, I think its good enough? After I got a stronger grasp on it. --- packages/L4/src/L4/check.py | 14 +++++++------- packages/L4/src/L4/syntax.py | 37 ++++++++++++++++++++---------------- 2 files changed, 28 insertions(+), 23 deletions(-) diff --git a/packages/L4/src/L4/check.py b/packages/L4/src/L4/check.py index 62b3d7d8..68cb163d 100644 --- a/packages/L4/src/L4/check.py +++ b/packages/L4/src/L4/check.py @@ -52,8 +52,7 @@ def equivalent( case Product(components=cs1), Product(components=cs2): return ( - len(cs1) == len(cs2) # - and all(recur(c1, c2) for c1, c2 in zip(cs1, cs2)) # + len(cs1) == len(cs2) and all(recur(c1, c2) for c1, c2 in zip(cs1, cs2)) # ) case _: @@ -106,12 +105,12 @@ def infer_term( raise ValueError(f"expected {target} to be {Arrow} not {target_type}") case Immediate(): - return Int() + return Int() # passes value to the type version case Boolean(): - return Bool() + return Bool() # made it pass the value to the type - case Primitive(operator=operator, left=left, right=right): + case Primitive(operator=operator, left=left, right=right): # Should only add Ints match operator: case "+" | "-" | "*": _check(left, Int()) @@ -120,7 +119,7 @@ def infer_term( case Branch( operator=operator, left=left, right=right, motive=motive, consequent=consequent, otherwise=otherwise - ): + ): # branch now only covers the comparison of Int types match operator: case "<" | "==": _check(left, Int()) @@ -137,7 +136,8 @@ def infer_term( raise ValueError(f"branches have different types: {consequent_type} and {otherwise_type}") return consequent_type - case And(left=left, right=right): + case And(left=left, right=right): # used to be branch but for clarity now used to represent the and operator + # should only accept bools and return a bool _check(left, Bool()) _check(right, Bool()) return Bool() diff --git a/packages/L4/src/L4/syntax.py b/packages/L4/src/L4/syntax.py index f8fdb7ce..a725d8bd 100644 --- a/packages/L4/src/L4/syntax.py +++ b/packages/L4/src/L4/syntax.py @@ -4,7 +4,8 @@ from pydantic import BaseModel, Field type Identifier = Annotated[str, Field(min_length=1)] -type Label = Annotated[str, Field(min_length=1)] +# type Label = Annotated[str, Field(min_length=1)] +# idk why this is here so I've commented it out type Nat = Annotated[int, Field(ge=0)] @@ -20,17 +21,17 @@ class Program(BaseModel, frozen=True): ] -class Arrow(BaseModel, frozen=True): +class Arrow(BaseModel, frozen=True): # Arrow type used to represent function types, e.g. int -> int tag: Literal["arrow"] = "arrow" domain: Type codomain: Type -class Int(BaseModel, frozen=True): +class Int(BaseModel, frozen=True): # Int, its an integer dude. Immutable tag: Literal["int"] = "int" -class Bool(BaseModel, frozen=True): +class Bool(BaseModel, frozen=True): # Bool, Truthiness Immutable tag: Literal["bool"] = "bool" @@ -38,6 +39,9 @@ class Trivial(BaseModel, frozen=True): tag: Literal["trivial"] = "trivial" +# commented out for now as it is unneeded + + class Product(BaseModel, frozen=True): tag: Literal["product"] = "product" components: Sequence[Type] @@ -85,19 +89,19 @@ class Application(BaseModel, frozen=True): argument: Term -class Boolean(BaseModel, frozen=True): +class Boolean(BaseModel, frozen=True): # the expression of booleans tag: Literal["boolean"] = "boolean" value: bool -class If(BaseModel, frozen=True): +class If(BaseModel, frozen=True): # lacks a motive tag: Literal["if"] = "if" test: Term consequent: Term otherwise: Term -class And(BaseModel, frozen=True): +class And(BaseModel, frozen=True): # tag: Literal["and"] = "and" left: Term right: Term @@ -118,9 +122,9 @@ class Primitive(BaseModel, frozen=True): class Branch(BaseModel, frozen=True): tag: Literal["branch"] = "branch" operator: Literal["<", "=="] - left: Term - right: Term - motive: Type + left: Term # any term currently, may want to make it unable to accept say a tuple + right: Term # because of this need to check the matter of + motive: Type # Expected return type of the branch consequent: Term otherwise: Term @@ -129,23 +133,24 @@ class Sole(BaseModel, frozen=True): tag: Literal["sole"] = "sole" -class Successor(BaseModel, frozen=True): - tag: Literal["successor"] = "successor" - target: Term +# class Successor(BaseModel, frozen=True): +# tag: Literal["successor"] = "successor" +# target: Term +# I have no idea what this is or what it is for but am not removing it in case its important -class Tuple(BaseModel, frozen=True): +class Tuple(BaseModel, frozen=True): # tuples should be 2 types grouped together yea? tag: Literal["tuple"] = "tuple" components: Sequence[Term] -class TupleGet(BaseModel, frozen=True): +class TupleGet(BaseModel, frozen=True): # grabs from the tuple returning the type(s) within? tag: Literal["tuple_get"] = "tuple_get" target: Term index: Nat -class Join(BaseModel, frozen=True): +class Join(BaseModel, frozen=True): # Or is join the literal tag: Literal["join"] = "join" components: Sequence[Term] From b734ce370776a25681da81e11f5bcbd307502012 Mon Sep 17 00:00:00 2001 From: nolanKeefe Date: Wed, 6 May 2026 14:43:02 -0400 Subject: [PATCH 45/60] Just a quick copy of L3 lark into the L4 lark file. No addition of types yet --- packages/L4/src/L4/L4.lark | 62 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 packages/L4/src/L4/L4.lark diff --git a/packages/L4/src/L4/L4.lark b/packages/L4/src/L4/L4.lark new file mode 100644 index 00000000..f2e0dc03 --- /dev/null +++ b/packages/L4/src/L4/L4.lark @@ -0,0 +1,62 @@ +%import common.WS +%ignore WS + +program : "(" PROGRAM "(" parameters ")" term ")" +parameters : IDENTIFIER* + +term : let + | letrec + | reference + | abstract + | apply + | immediate + | primitive + | branch + | allocate + | load + | store + | begin + + +let : "(" LET "(" bindings ")" term ")" + +letrec : "(" LETREC "(" bindings ")" term ")" + +bindings : binding* +binding : "(" IDENTIFIER term ")" + +reference : IDENTIFIER + +abstract : "(" LAMBDA "(" parameters ")" term ")" + +apply : "(" term term* ")" + +immediate : NUMBER + +primitive : "(" OPERATOR term term ")" + +branch : "(" IF "(" COMPARATOR term term ")" term term ")" + +allocate : "(" ALLOCATE immediate ")" + +load : "(" LOAD term immediate ")" + +store : "(" STORE term immediate term ")" + +begin : "(" BEGIN term+ ")" + +PROGRAM.2 : "l3" +LET.2 : "let" +LETREC.2 : "letrec" +LAMBDA.2 : "\\" | "lambda" | "λ" +IF.2 : "if" +ALLOCATE.2 : "allocate" +LOAD.2 : "load" +STORE.2 : "store" +BEGIN.2 : "begin" + +OPERATOR : "+" | "-" | "*" +COMPARATOR : "<" | "==" + +IDENTIFIER : /[a-zA-Z_][a-zA-Z0-9_]*/ +NUMBER : /-?\d+/ \ No newline at end of file From 6e8eb6e272952deb001b392cf9456938c35e69bc Mon Sep 17 00:00:00 2001 From: nolanKeefe Date: Wed, 6 May 2026 14:53:01 -0400 Subject: [PATCH 46/60] some types added and terms added to term need to actually write the use restraint tho --- packages/L4/src/L4/L4.lark | 29 +++++++++++++++++++++++++---- 1 file changed, 25 insertions(+), 4 deletions(-) diff --git a/packages/L4/src/L4/L4.lark b/packages/L4/src/L4/L4.lark index f2e0dc03..b2ac4c25 100644 --- a/packages/L4/src/L4/L4.lark +++ b/packages/L4/src/L4/L4.lark @@ -4,6 +4,7 @@ program : "(" PROGRAM "(" parameters ")" term ")" parameters : IDENTIFIER* + term : let | letrec | reference @@ -16,8 +17,14 @@ term : let | load | store | begin - - + //added terms for the lark + | if + | and + | sole + | tuple + | tuple_get + | join + | project let : "(" LET "(" bindings ")" term ")" letrec : "(" LETREC "(" bindings ")" term ")" @@ -45,7 +52,7 @@ store : "(" STORE term immediate term ")" begin : "(" BEGIN term+ ")" -PROGRAM.2 : "l3" +PROGRAM.2 : "l4" LET.2 : "let" LETREC.2 : "letrec" LAMBDA.2 : "\\" | "lambda" | "λ" @@ -59,4 +66,18 @@ OPERATOR : "+" | "-" | "*" COMPARATOR : "<" | "==" IDENTIFIER : /[a-zA-Z_][a-zA-Z0-9_]*/ -NUMBER : /-?\d+/ \ No newline at end of file +NUMBER : /-?\d+/ + +//the type domain annotations +//labelled as type for comprehension purposes to prevent confusion between terms and types +type : int_type + | bool_type + | trivial_type + | arrow_type + | product_type + +int_type : "Int" +bool_type : "Bool" +trivial_type: "Trivial" +arrow_type : "(" "->" type type ")" //needs to take a type and a type +product_type: "(" "Product" type* ")" // can be any number of types \ No newline at end of file From 3ad288362df30bc23b98e31d2f959dfdf266a36b Mon Sep 17 00:00:00 2001 From: nolanKeefe Date: Thu, 7 May 2026 15:17:42 -0400 Subject: [PATCH 47/60] L4.lark should be completed now. I believe it covers cases --- packages/L4/src/L4/L4.lark | 35 ++++++++++++++++++++++------------- 1 file changed, 22 insertions(+), 13 deletions(-) diff --git a/packages/L4/src/L4/L4.lark b/packages/L4/src/L4/L4.lark index b2ac4c25..1367fe10 100644 --- a/packages/L4/src/L4/L4.lark +++ b/packages/L4/src/L4/L4.lark @@ -52,6 +52,21 @@ store : "(" STORE term immediate term ")" begin : "(" BEGIN term+ ")" +//the type domain annotations +//labelled as type for comprehension purposes to prevent confusion between terms and types +type : int_type + | bool_type + | trivial_type + | arrow_type + | product_type + +int_type : "Int" +bool_type : "Bool" +trivial_type: "Trivial" +arrow_type : "(" "->" type type ")" //needs to take a type and a type +product_type: "(" "Product" type* ")" // can be any number of types + + PROGRAM.2 : "l4" LET.2 : "let" LETREC.2 : "letrec" @@ -68,16 +83,10 @@ COMPARATOR : "<" | "==" IDENTIFIER : /[a-zA-Z_][a-zA-Z0-9_]*/ NUMBER : /-?\d+/ -//the type domain annotations -//labelled as type for comprehension purposes to prevent confusion between terms and types -type : int_type - | bool_type - | trivial_type - | arrow_type - | product_type - -int_type : "Int" -bool_type : "Bool" -trivial_type: "Trivial" -arrow_type : "(" "->" type type ")" //needs to take a type and a type -product_type: "(" "Product" type* ")" // can be any number of types \ No newline at end of file +//added terms for the lark +AND.2 : "and" +SOLE.2 : "sole" +TUPLE.2 : "tuple" +TUPLE_GET.2 : "tuple-get" +JOIN.2 : "join" +PROJECT.2 : "project" \ No newline at end of file From cd777fe54ddd5ce7dbcf9b4b3a35f04813880053 Mon Sep 17 00:00:00 2001 From: nolanKeefe Date: Thu, 7 May 2026 15:33:13 -0400 Subject: [PATCH 48/60] changed class.l4 to hopefully fit syntax written --- packages/L4/examples/class.l4 | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/packages/L4/examples/class.l4 b/packages/L4/examples/class.l4 index a994f636..8cef8c63 100644 --- a/packages/L4/examples/class.l4 +++ b/packages/L4/examples/class.l4 @@ -1 +1,5 @@ -(Lambda (x: Int) (lambda (y: Int) (if (> (+xy) 0) Int 1 0))) \ No newline at end of file +(lambda x : Int + (lambda y : Int + (if (< 0 (+ x y)) Int + 1 + 0))) \ No newline at end of file From 991c47feed3ea98e1faf01032b2ec3191aecd765 Mon Sep 17 00:00:00 2001 From: nolanKeefe Date: Fri, 8 May 2026 14:00:17 -0400 Subject: [PATCH 49/60] Notes he gave us, adding box type --- packages/L4/src/L4/syntax.py | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/packages/L4/src/L4/syntax.py b/packages/L4/src/L4/syntax.py index a725d8bd..34917828 100644 --- a/packages/L4/src/L4/syntax.py +++ b/packages/L4/src/L4/syntax.py @@ -39,7 +39,9 @@ class Trivial(BaseModel, frozen=True): tag: Literal["trivial"] = "trivial" -# commented out for now as it is unneeded +# Add a type of box, memory cell or box that goes down to memory +# Can contain a product or a product that contains boxes if mutability is wanted there +# type ascription, bi-directional stuff class Product(BaseModel, frozen=True): From fe76d3e3b5b15e1cb9dbfa63feebae6c04f5d64c Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Mon, 11 May 2026 13:59:00 -0400 Subject: [PATCH 50/60] renamed example files --- packages/L4/examples/{class.l4 => one.l4} | 0 packages/L4/examples/{test.l4 => two.l4} | 0 2 files changed, 0 insertions(+), 0 deletions(-) rename packages/L4/examples/{class.l4 => one.l4} (100%) rename packages/L4/examples/{test.l4 => two.l4} (100%) diff --git a/packages/L4/examples/class.l4 b/packages/L4/examples/one.l4 similarity index 100% rename from packages/L4/examples/class.l4 rename to packages/L4/examples/one.l4 diff --git a/packages/L4/examples/test.l4 b/packages/L4/examples/two.l4 similarity index 100% rename from packages/L4/examples/test.l4 rename to packages/L4/examples/two.l4 From fbd0b335b0dc9c36f34a5671ec49c65231f661a7 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Sun, 17 May 2026 16:54:47 -0400 Subject: [PATCH 51/60] This took forever but added semantic highlighting and it is working reliably. Now need to merge in Nolan's L4 changes and then make any minor changes to get the LSP working with the new types. --- lsp/client/package.json | 6 +- lsp/client/src/extension.ts | 5 +- lsp/client/src/test/completion.test.ts | 2 +- lsp/client/src/test/diagnostics.test.ts | 8 +- lsp/client/src/test/helper.ts | 2 +- lsp/client/src/test/semanticTokens.test.ts | 19 ++++ lsp/client/testFixture/diagnostics.l3 | 1 + lsp/client/testFixture/highlighting.l4 | 1 + lsp/client/tsconfig.tsbuildinfo | 2 +- lsp/package.json | 13 ++- lsp/server/src/server.ts | 106 +++++++++++++++------ lsp/themes/l4-theme.json | 27 ++++++ packages/L4/test/L4/highlighting.l4 | 8 ++ 13 files changed, 153 insertions(+), 47 deletions(-) create mode 100644 lsp/client/src/test/semanticTokens.test.ts create mode 100644 lsp/client/testFixture/diagnostics.l3 create mode 100644 lsp/client/testFixture/highlighting.l4 create mode 100644 lsp/themes/l4-theme.json create mode 100644 packages/L4/test/L4/highlighting.l4 diff --git a/lsp/client/package.json b/lsp/client/package.json index 3f62c5be..afe891da 100644 --- a/lsp/client/package.json +++ b/lsp/client/package.json @@ -1,14 +1,10 @@ { - "name": "lsp-sample-client", + "name": "cisc471c-lsp-client", "description": "VSCode part of a language server", "author": "Microsoft Corporation", "license": "MIT", "version": "0.0.1", "publisher": "vscode", - "repository": { - "type": "git", - "url": "https://github.com/Microsoft/vscode-extension-samples" - }, "engines": { "vscode": "^1.100.0" }, diff --git a/lsp/client/src/extension.ts b/lsp/client/src/extension.ts index 5baa3768..7601e386 100644 --- a/lsp/client/src/extension.ts +++ b/lsp/client/src/extension.ts @@ -30,7 +30,10 @@ export function activate(context: ExtensionContext) { const clientOptions: LanguageClientOptions = { // Register the server for l0, l1, l2, l3, and l4 documents along with the unsaved buffers // so language features work before first save - documentSelector: [{ scheme: 'file', language: 'lsp-471c' }], + documentSelector: [ + { scheme: 'file', language: 'lsp-471c' }, + { scheme: 'untitled', language: 'lsp-471c' } + ], synchronize: { // Notify the server about file changes to '.clientrc files contained in the workspace fileEvents: workspace.createFileSystemWatcher('**/.clientrc') diff --git a/lsp/client/src/test/completion.test.ts b/lsp/client/src/test/completion.test.ts index f3550788..8db15434 100644 --- a/lsp/client/src/test/completion.test.ts +++ b/lsp/client/src/test/completion.test.ts @@ -8,7 +8,7 @@ import * as assert from 'assert'; import { getDocUri, activate } from './helper'; suite('Should do completion', () => { - const docUri = getDocUri('completion.txt'); + const docUri = getDocUri('highlighting.l4'); test('Completes JS/TS in txt file', async () => { await testCompletion(docUri, new vscode.Position(0, 0), { diff --git a/lsp/client/src/test/diagnostics.test.ts b/lsp/client/src/test/diagnostics.test.ts index 1aa8a36f..9a1f2342 100644 --- a/lsp/client/src/test/diagnostics.test.ts +++ b/lsp/client/src/test/diagnostics.test.ts @@ -8,13 +8,11 @@ import * as assert from 'assert'; import { getDocUri, activate } from './helper'; suite('Should get diagnostics', () => { - const docUri = getDocUri('diagnostics.txt'); + const docUri = getDocUri('diagnostics.l3'); - test('Diagnoses uppercase texts', async () => { + test('Diagnoses unbound variables', async () => { await testDiagnostics(docUri, [ - { message: 'ANY is all uppercase.', range: toRange(0, 0, 0, 3), severity: vscode.DiagnosticSeverity.Warning, source: 'ex' }, - { message: 'ANY is all uppercase.', range: toRange(0, 14, 0, 17), severity: vscode.DiagnosticSeverity.Warning, source: 'ex' }, - { message: 'OS is all uppercase.', range: toRange(0, 18, 0, 20), severity: vscode.DiagnosticSeverity.Warning, source: 'ex' } + { message: 'Unbound variable: x', range: toRange(0, 7, 0, 8), severity: vscode.DiagnosticSeverity.Error, source: 'l3' } ]); }); }); diff --git a/lsp/client/src/test/helper.ts b/lsp/client/src/test/helper.ts index 6e6724d3..74ab1e10 100644 --- a/lsp/client/src/test/helper.ts +++ b/lsp/client/src/test/helper.ts @@ -16,7 +16,7 @@ export let platformEol: string; */ export async function activate(docUri: vscode.Uri) { // The extensionId is `publisher.name` from package.json - const ext = vscode.extensions.getExtension('vscode-samples.lsp-sample')!; + const ext = vscode.extensions.getExtension('vscode-samples.cisc471c-lsp-server')!; await ext.activate(); try { doc = await vscode.workspace.openTextDocument(docUri); diff --git a/lsp/client/src/test/semanticTokens.test.ts b/lsp/client/src/test/semanticTokens.test.ts new file mode 100644 index 00000000..ef2c6253 --- /dev/null +++ b/lsp/client/src/test/semanticTokens.test.ts @@ -0,0 +1,19 @@ +import * as assert from 'assert'; +import * as vscode from 'vscode'; +import { activate, getDocUri } from './helper'; + +suite('Should provide semantic tokens', () => { + const docUri = getDocUri('highlighting.l4'); + + test('Highlights L4 keywords and types', async () => { + await activate(docUri); + + const tokens = (await vscode.commands.executeCommand( + 'vscode.provideDocumentSemanticTokens', + docUri + )) as vscode.SemanticTokens | undefined; + + assert.ok(tokens); + assert.ok(tokens.data.length > 0); + }); +}); \ No newline at end of file diff --git a/lsp/client/testFixture/diagnostics.l3 b/lsp/client/testFixture/diagnostics.l3 new file mode 100644 index 00000000..118d8840 --- /dev/null +++ b/lsp/client/testFixture/diagnostics.l3 @@ -0,0 +1 @@ +(l3 () x) \ No newline at end of file diff --git a/lsp/client/testFixture/highlighting.l4 b/lsp/client/testFixture/highlighting.l4 new file mode 100644 index 00000000..53054e64 --- /dev/null +++ b/lsp/client/testFixture/highlighting.l4 @@ -0,0 +1 @@ +program arrow int bool if and primitive branch sole successor tuple tuple_get join project parameter target argument test consequent otherwise left right components index operator motive value domain codomain name \ No newline at end of file diff --git a/lsp/client/tsconfig.tsbuildinfo b/lsp/client/tsconfig.tsbuildinfo index de3d3b31..22f9b14b 100644 --- a/lsp/client/tsconfig.tsbuildinfo +++ b/lsp/client/tsconfig.tsbuildinfo @@ -1 +1 @@ -{"root":["./src/extension.ts","./src/test/completion.test.ts","./src/test/diagnostics.test.ts","./src/test/helper.ts","./src/test/index.ts","./src/test/runtest.ts"],"version":"5.9.2"} \ No newline at end of file +{"root":["./src/extension.ts","./src/test/completion.test.ts","./src/test/diagnostics.test.ts","./src/test/helper.ts","./src/test/index.ts","./src/test/runtest.ts","./src/test/semantictokens.test.ts"],"version":"5.9.2"} \ No newline at end of file diff --git a/lsp/package.json b/lsp/package.json index fa0ff74d..385fd16a 100644 --- a/lsp/package.json +++ b/lsp/package.json @@ -1,5 +1,5 @@ { - "name": "lsp-sample", + "name": "cisc471c-lsp-server", "description": "A language server example", "author": "Microsoft Corporation", "license": "MIT", @@ -24,7 +24,16 @@ "languages": [ { "id": "lsp-471c", - "extensions": [".l3"] + "extensions": [".l3", ".l4"] + } + ], + "semanticTokenScopes": [ + { + "language": "lsp-471c", + "scopes": { + "keyword": ["keyword.control.l4"], + "type": ["storage.type.l4"] + } } ], "configuration": { diff --git a/lsp/server/src/server.ts b/lsp/server/src/server.ts index 9301e1c0..35b7e145 100644 --- a/lsp/server/src/server.ts +++ b/lsp/server/src/server.ts @@ -11,8 +11,8 @@ import { TextDocumentPositionParams, TextDocumentSyncKind, InitializeResult, - DocumentDiagnosticReportKind, - type DocumentDiagnosticReport + SemanticTokensBuilder, + SemanticTokensRequest } from 'vscode-languageserver/node'; import { execFile } from 'node:child_process'; import { existsSync } from 'node:fs'; @@ -27,6 +27,7 @@ import { } from 'vscode-languageserver-textdocument'; const execFileAsync = promisify(execFile); +const repositoryRootPath = dirname(dirname(dirname(__dirname))); // Create a connection for the server, using Node's IPC as a transport. // Also include all preview / proposed LSP features. @@ -67,6 +68,9 @@ connection.onInitialize((params: InitializeParams) => { const capabilities = params.capabilities; workspaceRootPath = extractWorkspaceRootPath(params); + connection.console.log('[Initialize] Server initializing'); + connection.console.log(`[Initialize] Client supports textDocument.semanticTokens: ${!!capabilities.textDocument?.semanticTokens}`); + // Does the client support the `workspace/configuration` request? // If not, we fall back using global settings. hasConfigurationCapability = !!( @@ -88,12 +92,19 @@ connection.onInitialize((params: InitializeParams) => { completionProvider: { resolveProvider: true }, - diagnosticProvider: { - interFileDependencies: false, - workspaceDiagnostics: false + // Semantic tokens for simple keyword/type highlighting in .l4 files + semanticTokensProvider: { + legend: { + tokenTypes: ['keyword', 'type'], + tokenModifiers: [] + }, + full: true } } }; + + connection.console.log('[Initialize] Advertising semanticTokensProvider capability'); + if (hasWorkspaceFolderCapability) { result.capabilities.workspace = { workspaceFolders: { @@ -105,6 +116,7 @@ connection.onInitialize((params: InitializeParams) => { }); connection.onInitialized(() => { + connection.console.log('[Initialized] Server initialized'); if (hasConfigurationCapability) { // Register for all configuration changes. connection.client.register(DidChangeConfigurationNotification.type, undefined); @@ -139,10 +151,6 @@ connection.onDidChangeConfiguration(change => { (change.settings.languageServerExample || defaultSettings) ); } - // Refresh the diagnostics since the `maxNumberOfProblems` could have changed. - // We could optimize things here and re-fetch the setting first can compare it - // to the existing setting, but this is out of scope for this example. - connection.languages.diagnostics.refresh(); }); function getDocumentSettings(resource: string): Thenable { @@ -166,24 +174,6 @@ documents.onDidClose(e => { connection.sendDiagnostics({ uri: e.document.uri, diagnostics: [] }); }); - -connection.languages.diagnostics.on(async (params) => { - const document = documents.get(params.textDocument.uri); - if (document !== undefined) { - return { - kind: DocumentDiagnosticReportKind.Full, - items: await validateTextDocument(document) - } satisfies DocumentDiagnosticReport; - } else { - // We don't know the document. We can either try to read it from disk - // or we don't report problems for it. - return { - kind: DocumentDiagnosticReportKind.Full, - items: [] - } satisfies DocumentDiagnosticReport; - } -}); - // The content of a text document has changed. This event is emitted // when the text document first opened or when its content has changed. documents.onDidChangeContent(change => { @@ -191,6 +181,7 @@ documents.onDidChangeContent(change => { }); documents.onDidOpen(event => { + connection.console.log(`[DocumentOpen] Opened: ${event.document.uri}, languageId: ${event.document.languageId}`); void publishDiagnostics(event.document); }); @@ -282,16 +273,19 @@ async function createTempL3File(text: string): Promise<{ dirPath: string; filePa } async function runL3Diagnostics(filePath: string): Promise { - const workingDirectory = workspaceRootPath ?? dirname(filePath); + const projectRootCandidates = [workspaceRootPath, repositoryRootPath].filter((candidate): candidate is string => { + return typeof candidate === 'string' && existsSync(join(candidate, 'packages', 'L3')); + }); + const workingDirectory = projectRootCandidates[0] ?? workspaceRootPath ?? dirname(filePath); const commandCandidates: Array<{ command: string; args: string[] }> = []; - if (workspaceRootPath) { - const venvL3 = join(workspaceRootPath, '.venv', 'bin', 'l3'); + for (const rootPath of projectRootCandidates) { + const venvL3 = join(rootPath, '.venv', 'bin', 'l3'); if (existsSync(venvL3)) { commandCandidates.push({ command: venvL3, args: ['--diagnostics-json', filePath] }); } - const venvPython = join(workspaceRootPath, '.venv', 'bin', 'python'); + const venvPython = join(rootPath, '.venv', 'bin', 'python'); if (existsSync(venvPython)) { commandCandidates.push({ command: venvPython, args: ['-m', 'L3.main', '--diagnostics-json', filePath] }); } @@ -430,6 +424,56 @@ connection.onCompletionResolve( } ); + // Semantic tokens: simple keyword/type highlighting for .l4 files +// Semantic tokens: simple keyword/type highlighting for .l4 files +connection.onRequest(SemanticTokensRequest.type, params => { + const uri = params.textDocument.uri; + const doc = documents.get(uri); + connection.console.log(`[SemanticTokens] Received request for uri=${uri}`); + connection.console.log(`[SemanticTokens] Document exists: ${!!doc}, ends with .l4: ${uri.endsWith('.l4')}`); + + if (!uri.endsWith('.l4') || !doc) { + connection.console.log(`[SemanticTokens] Skipping - not .l4 or no document`); + return { data: [] }; + } + + // Keywords and types derived from packages/L4/src/L4/syntax.py + const typeKeywords = ['arrow', 'int', 'bool', 'trivial', 'product']; + const syntaxKeywords = [ + 'program', 'reference', 'abstraction', 'application', 'boolean', 'if', 'and', 'immediate', + 'primitive', 'branch', 'sole', 'tuple', 'tuple_get', 'join', 'project', + 'parameter', 'target', 'argument', 'test', 'consequent', 'otherwise', 'left', 'right', + 'components', 'index', 'operator', 'motive', 'value', 'domain', 'codomain', 'name' + ]; + + const all = [...typeKeywords, ...syntaxKeywords]; + // Build a regex that matches whole words; escape names just in case. + const escaped = all.map(s => s.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&')); + const regex = new RegExp(`\\b(?:${escaped.join('|')})\\b`, 'g'); + + const builder = new SemanticTokensBuilder(); + const lines = doc.getText().split(/\r?\n/); + connection.console.log(`[SemanticTokens] Processing ${lines.length} lines from document`); + + for (let line = 0; line < lines.length; line++) { + const text = lines[line]; + let match: RegExpExecArray | null; + regex.lastIndex = 0; + while ((match = regex.exec(text)) !== null) { + const word = match[0]; + const startChar = match.index; + const length = word.length; + const tokenType = typeKeywords.includes(word) ? 1 /* 'type' */ : 0 /* 'keyword' */; + connection.console.log(`[SemanticTokens] Token: "${word}" at ${line}:${startChar}, type=${tokenType}`); + builder.push(line, startChar, length, tokenType, 0); + } + } + + const result = builder.build(); + connection.console.log(`[SemanticTokens] Returning ${result.data.length} data elements`); + return result; +}); + // Make the text document manager listen on the connection // for open, change and close text document events documents.listen(connection); diff --git a/lsp/themes/l4-theme.json b/lsp/themes/l4-theme.json new file mode 100644 index 00000000..84c24e50 --- /dev/null +++ b/lsp/themes/l4-theme.json @@ -0,0 +1,27 @@ +{ + "name": "L4 Semantic Theme", + "type": "dark", + "colors": { + "editor.background": "#1e1e1e", + "editor.foreground": "#d4d4d4", + "editorBracketMatch.background": "#0e639c", + "editorBracketMatch.border": "#888888" + }, + "tokenColors": [ + { + "name": "L4 Keyword", + "scope": "keyword.control.l4", + "settings": { + "foreground": "#C586C0", + "fontStyle": "bold" + } + }, + { + "name": "L4 Type", + "scope": "storage.type.l4", + "settings": { + "foreground": "#4EC9B0" + } + } + ] +} diff --git a/packages/L4/test/L4/highlighting.l4 b/packages/L4/test/L4/highlighting.l4 new file mode 100644 index 00000000..e3c6f9d6 --- /dev/null +++ b/packages/L4/test/L4/highlighting.l4 @@ -0,0 +1,8 @@ +program +abstraction parameter domain +application target argument +boolean value if test consequent otherwise +int bool trivial product +primitive operator left right +branch +sole tuple tuple_get join project From 7893a2d19dd2c5aad4ba7170d0b9cbb0f083ff65 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Sun, 17 May 2026 17:29:50 -0400 Subject: [PATCH 52/60] Implement L4 syntax support with diagnostics and example files --- lsp/client/src/test/diagnostics.test.ts | 12 ++ lsp/client/testFixture/diagnostics.l4 | 3 + lsp/client/testFixture/highlighting.l4 | 2 +- lsp/server/src/server.ts | 61 ++++++++- lsp/themes/l4-theme.json | 28 +--- packages/L4/examples/one.l4 | 9 +- packages/L4/examples/two.l4 | 10 +- packages/L4/src/L4/L4.lark | 57 +++----- packages/L4/src/L4/diagnostics.py | 170 ++++++++++++++++++++++++ packages/L4/src/L4/main.py | 82 ++++++++++++ packages/L4/src/L4/parse.py | 127 ++++++++++++++++++ packages/L4/src/L4/syntax.py | 9 +- packages/L4/test/L4/highlighting.l4 | 9 +- 13 files changed, 485 insertions(+), 94 deletions(-) create mode 100644 lsp/client/testFixture/diagnostics.l4 create mode 100644 packages/L4/src/L4/diagnostics.py create mode 100644 packages/L4/src/L4/main.py create mode 100644 packages/L4/src/L4/parse.py diff --git a/lsp/client/src/test/diagnostics.test.ts b/lsp/client/src/test/diagnostics.test.ts index 9a1f2342..e42088ae 100644 --- a/lsp/client/src/test/diagnostics.test.ts +++ b/lsp/client/src/test/diagnostics.test.ts @@ -9,12 +9,24 @@ import { getDocUri, activate } from './helper'; suite('Should get diagnostics', () => { const docUri = getDocUri('diagnostics.l3'); + const l4DocUri = getDocUri('diagnostics.l4'); test('Diagnoses unbound variables', async () => { await testDiagnostics(docUri, [ { message: 'Unbound variable: x', range: toRange(0, 7, 0, 8), severity: vscode.DiagnosticSeverity.Error, source: 'l3' } ]); }); + + test('Diagnoses malformed L4 syntax', async () => { + await activate(l4DocUri); + + const actualDiagnostics = vscode.languages.getDiagnostics(l4DocUri); + + assert.ok(actualDiagnostics.length > 0); + assert.equal(actualDiagnostics[0].severity, vscode.DiagnosticSeverity.Error); + assert.equal(actualDiagnostics[0].source, 'l4'); + assert.equal(actualDiagnostics[0].message, 'Missing closing parenthesis.'); + }); }); function toRange(sLine: number, sChar: number, eLine: number, eChar: number) { diff --git a/lsp/client/testFixture/diagnostics.l4 b/lsp/client/testFixture/diagnostics.l4 new file mode 100644 index 00000000..e3bb8944 --- /dev/null +++ b/lsp/client/testFixture/diagnostics.l4 @@ -0,0 +1,3 @@ +(the + (-> Int (-> Int Int)) + (lambda (x) (lambda (y) (if (> (+ x y) 0) 1 0))) \ No newline at end of file diff --git a/lsp/client/testFixture/highlighting.l4 b/lsp/client/testFixture/highlighting.l4 index 53054e64..4dea60ca 100644 --- a/lsp/client/testFixture/highlighting.l4 +++ b/lsp/client/testFixture/highlighting.l4 @@ -1 +1 @@ -program arrow int bool if and primitive branch sole successor tuple tuple_get join project parameter target argument test consequent otherwise left right components index operator motive value domain codomain name \ No newline at end of file +l4 let letrec lambda if allocate load store begin and sole tuple tuple-get join project Int Bool Trivial Product \ No newline at end of file diff --git a/lsp/server/src/server.ts b/lsp/server/src/server.ts index 35b7e145..47772b1c 100644 --- a/lsp/server/src/server.ts +++ b/lsp/server/src/server.ts @@ -265,6 +265,52 @@ function toLspDiagnostic(uri: string, diagnostic: L3Diagnostic): Diagnostic { return lspDiagnostic; } +function toL4SyntaxDiagnostic(uri: string, text: string): Diagnostic | null { + const stack: Array<{ line: number; character: number }> = []; + const lines = text.split(/\r?\n/); + + for (let lineIndex = 0; lineIndex < lines.length; lineIndex++) { + const line = lines[lineIndex]; + for (let character = 0; character < line.length; character++) { + const ch = line[character]; + if (ch === '(') { + stack.push({ line: lineIndex, character }); + } else if (ch === ')') { + if (stack.length === 0) { + return { + severity: DiagnosticSeverity.Error, + range: { + start: { line: lineIndex, character }, + end: { line: lineIndex, character: character + 1 } + }, + message: 'Unmatched closing parenthesis.', + source: 'l4', + code: 'L4_SYNTAX_ERROR' + }; + } + stack.pop(); + } + } + } + + if (stack.length === 0) { + return null; + } + + const lastLineIndex = lines.length - 1; + const lastCharacter = lines[lastLineIndex]?.length ?? 0; + return { + severity: DiagnosticSeverity.Error, + range: { + start: { line: lastLineIndex, character: lastCharacter }, + end: { line: lastLineIndex, character: lastCharacter + 1 } + }, + message: 'Missing closing parenthesis.', + source: 'l4', + code: 'L4_SYNTAX_ERROR' + }; +} + async function createTempL3File(text: string): Promise<{ dirPath: string; filePath: string }> { const dirPath = await mkdtemp(join(tmpdir(), 'l3-lsp-')); const filePath = join(dirPath, 'document.l3'); @@ -345,6 +391,11 @@ async function runL3Diagnostics(filePath: string): Promise } async function validateTextDocument(textDocument: TextDocument): Promise { + if (textDocument.uri.endsWith('.l4')) { + const syntaxDiagnostic = toL4SyntaxDiagnostic(textDocument.uri, textDocument.getText()); + return syntaxDiagnostic ? [syntaxDiagnostic] : []; + } + if (!textDocument.uri.endsWith('.l3')) { return []; } @@ -437,13 +488,11 @@ connection.onRequest(SemanticTokensRequest.type, params => { return { data: [] }; } - // Keywords and types derived from packages/L4/src/L4/syntax.py - const typeKeywords = ['arrow', 'int', 'bool', 'trivial', 'product']; + // Keywords and types derived from packages/L4/src/L4/L4.lark + const typeKeywords = ['Int', 'Bool', 'Trivial', 'Product']; const syntaxKeywords = [ - 'program', 'reference', 'abstraction', 'application', 'boolean', 'if', 'and', 'immediate', - 'primitive', 'branch', 'sole', 'tuple', 'tuple_get', 'join', 'project', - 'parameter', 'target', 'argument', 'test', 'consequent', 'otherwise', 'left', 'right', - 'components', 'index', 'operator', 'motive', 'value', 'domain', 'codomain', 'name' + 'l4', 'let', 'letrec', 'lambda', 'if', 'allocate', 'load', 'store', 'begin', + 'and', 'sole', 'tuple', 'tuple-get', 'join', 'project' ]; const all = [...typeKeywords, ...syntaxKeywords]; diff --git a/lsp/themes/l4-theme.json b/lsp/themes/l4-theme.json index 84c24e50..8b137891 100644 --- a/lsp/themes/l4-theme.json +++ b/lsp/themes/l4-theme.json @@ -1,27 +1 @@ -{ - "name": "L4 Semantic Theme", - "type": "dark", - "colors": { - "editor.background": "#1e1e1e", - "editor.foreground": "#d4d4d4", - "editorBracketMatch.background": "#0e639c", - "editorBracketMatch.border": "#888888" - }, - "tokenColors": [ - { - "name": "L4 Keyword", - "scope": "keyword.control.l4", - "settings": { - "foreground": "#C586C0", - "fontStyle": "bold" - } - }, - { - "name": "L4 Type", - "scope": "storage.type.l4", - "settings": { - "foreground": "#4EC9B0" - } - } - ] -} + diff --git a/packages/L4/examples/one.l4 b/packages/L4/examples/one.l4 index 8cef8c63..9831504b 100644 --- a/packages/L4/examples/one.l4 +++ b/packages/L4/examples/one.l4 @@ -1,5 +1,4 @@ -(lambda x : Int - (lambda y : Int - (if (< 0 (+ x y)) Int - 1 - 0))) \ No newline at end of file +(l4 () + (let ((x 1)) + (let ((y 2)) + (+ x y)))) \ No newline at end of file diff --git a/packages/L4/examples/two.l4 b/packages/L4/examples/two.l4 index d5fbc306..54be36af 100644 --- a/packages/L4/examples/two.l4 +++ b/packages/L4/examples/two.l4 @@ -1,4 +1,6 @@ -(the - (-> Int (-> Int Int)) - (lambda (x) (lambda (y) (if (> (+ x y) 0) 1 0))) -) \ No newline at end of file +(l4 () + ((lambda (x) + (lambda (y) + (+ x y))) + 1 + 2)) \ No newline at end of file diff --git a/packages/L4/src/L4/L4.lark b/packages/L4/src/L4/L4.lark index 1367fe10..78df34b1 100644 --- a/packages/L4/src/L4/L4.lark +++ b/packages/L4/src/L4/L4.lark @@ -4,30 +4,21 @@ program : "(" PROGRAM "(" parameters ")" term ")" parameters : IDENTIFIER* - term : let - | letrec | reference | abstract | apply | immediate | primitive - | branch - | allocate - | load - | store - | begin - //added terms for the lark - | if - | and - | sole - | tuple - | tuple_get - | join - | project -let : "(" LET "(" bindings ")" term ")" + | if_expr + | and_expr + | sole_expr + | tuple_expr + | tuple_get_expr + | join_expr + | project_expr -letrec : "(" LETREC "(" bindings ")" term ")" +let : "(" LET "(" bindings ")" term ")" bindings : binding* binding : "(" IDENTIFIER term ")" @@ -42,48 +33,30 @@ immediate : NUMBER primitive : "(" OPERATOR term term ")" -branch : "(" IF "(" COMPARATOR term term ")" term term ")" - -allocate : "(" ALLOCATE immediate ")" +if_expr : "(" IF term term term ")" -load : "(" LOAD term immediate ")" +and_expr : "(" AND term term ")" -store : "(" STORE term immediate term ")" +sole_expr : SOLE -begin : "(" BEGIN term+ ")" +tuple_expr : "(" TUPLE term+ ")" -//the type domain annotations -//labelled as type for comprehension purposes to prevent confusion between terms and types -type : int_type - | bool_type - | trivial_type - | arrow_type - | product_type +tuple_get_expr : "(" TUPLE_GET term immediate ")" -int_type : "Int" -bool_type : "Bool" -trivial_type: "Trivial" -arrow_type : "(" "->" type type ")" //needs to take a type and a type -product_type: "(" "Product" type* ")" // can be any number of types +join_expr : "(" JOIN term+ ")" +project_expr : "(" PROJECT term immediate ")" PROGRAM.2 : "l4" LET.2 : "let" -LETREC.2 : "letrec" LAMBDA.2 : "\\" | "lambda" | "λ" IF.2 : "if" -ALLOCATE.2 : "allocate" -LOAD.2 : "load" -STORE.2 : "store" -BEGIN.2 : "begin" OPERATOR : "+" | "-" | "*" -COMPARATOR : "<" | "==" IDENTIFIER : /[a-zA-Z_][a-zA-Z0-9_]*/ NUMBER : /-?\d+/ -//added terms for the lark AND.2 : "and" SOLE.2 : "sole" TUPLE.2 : "tuple" diff --git a/packages/L4/src/L4/diagnostics.py b/packages/L4/src/L4/diagnostics.py new file mode 100644 index 00000000..493d1791 --- /dev/null +++ b/packages/L4/src/L4/diagnostics.py @@ -0,0 +1,170 @@ +from __future__ import annotations + +import re +from collections.abc import Sequence +from pathlib import Path +from typing import Literal + +from lark import UnexpectedInput +from pydantic import BaseModel + +from .check import check_program +from .parse import parse_program + +type DiagnosticStage = Literal["syntax", "semantic", "internal"] +type DiagnosticSeverity = Literal["error", "warning", "information"] + + +class Diagnostic(BaseModel, frozen=True): + stage: DiagnosticStage + severity: DiagnosticSeverity = "error" + code: str + message: str + line: int | None = None + column: int | None = None + end_line: int | None = None + end_column: int | None = None + snippet: str | None = None + + +class DiagnosticsReport(BaseModel, frozen=True): + ok: bool + diagnostics: Sequence[Diagnostic] + + +def _line_snippet(source: str, line: int | None) -> str | None: + if line is None: + return None + + lines = source.splitlines() + if line < 1 or line > len(lines): + return None + + return lines[line - 1] + + +def _position_for_identifier(source: str, identifier: str) -> tuple[int, int] | None: + pattern = re.compile(rf"\b{re.escape(identifier)}\b") + match = pattern.search(source) + if match is None: + return None + + before = source[: match.start()] + line = before.count("\n") + 1 + if "\n" in before: + column = len(before.rsplit("\n", maxsplit=1)[-1]) + 1 + else: + column = len(before) + 1 + + return line, column + + +def _identifier_from_message(message: str) -> str | None: + unbound = re.search(r"unknown variable:\s*([A-Za-z_][A-Za-z0-9_]*)", message) + if unbound: + return unbound.group(1) + + duplicate = re.search(r"Duplicate (?:bindings|parameters):\s*(.+)$", message) + if duplicate is None: + return None + + names = re.findall(r"[A-Za-z_][A-Za-z0-9_]*", duplicate.group(1)) + if not names: + return None + + return names[0] + + +def _normalize_error_position(source: str, line: int | None, column: int | None) -> tuple[int, int]: + if isinstance(line, int) and isinstance(column, int) and line > 0 and column > 0: + return line, column + + lines = source.splitlines() + if not lines: + return 1, 1 + + last_line_number = len(lines) + last_column = len(lines[-1]) + 1 + return last_line_number, last_column + + +def _syntax_diagnostic(source: str, error: UnexpectedInput) -> Diagnostic: + expected = sorted(getattr(error, "expected", [])) + expected_message = "" + if expected: + expected_message = f" Expected one of: {', '.join(expected)}." + + line, column = _normalize_error_position( + source, + getattr(error, "line", None), + getattr(error, "column", None), + ) + + return Diagnostic( + stage="syntax", + code="L4_SYNTAX_ERROR", + message=f"{str(error).strip()}.{expected_message}", + line=line, + column=column, + end_line=line, + end_column=column + 1, + snippet=_line_snippet(source, line), + ) + + +def _semantic_diagnostic(source: str, message: str) -> Diagnostic: + identifier = _identifier_from_message(message) + position = _position_for_identifier(source, identifier) if identifier else None + + line: int | None = None + column: int | None = None + end_column: int | None = None + + if position is not None: + line, column = position + end_column = column + len(identifier) if identifier else None + + code = "L4_SEMANTIC_ERROR" + if message.startswith("unknown variable"): + code = "L4_UNBOUND_VARIABLE" + elif message.startswith("Duplicate bindings"): + code = "L4_DUPLICATE_BINDINGS" + elif message.startswith("Duplicate parameters"): + code = "L4_DUPLICATE_PARAMETERS" + + return Diagnostic( + stage="semantic", + code=code, + message=message, + line=line, + column=column, + end_line=line, + end_column=end_column, + snippet=_line_snippet(source, line), + ) + + +def analyze_source(source: str) -> DiagnosticsReport: + try: + program = parse_program(source) + check_program(program) + return DiagnosticsReport(ok=True, diagnostics=[]) + except UnexpectedInput as error: + return DiagnosticsReport(ok=False, diagnostics=[_syntax_diagnostic(source, error)]) + except ValueError as error: + return DiagnosticsReport(ok=False, diagnostics=[_semantic_diagnostic(source, str(error))]) + except Exception as error: # pragma: no cover + return DiagnosticsReport( + ok=False, + diagnostics=[ + Diagnostic( + stage="internal", + code="L4_INTERNAL_ERROR", + message=str(error), + ) + ], + ) + + +def analyze_file(path: Path) -> DiagnosticsReport: + return analyze_source(path.read_text()) diff --git a/packages/L4/src/L4/main.py b/packages/L4/src/L4/main.py new file mode 100644 index 00000000..f21abf36 --- /dev/null +++ b/packages/L4/src/L4/main.py @@ -0,0 +1,82 @@ +from pathlib import Path + +import click +from L2.optimize import optimize_program +from L2.to_python import to_ast_program +from L3.eliminate_letrec import eliminate_letrec_program +from L3.uniqify import uniqify_program + +from .check import check_program +from .diagnostics import analyze_source +from .elaborate import elaborate_program +from .parse import parse_program + + +@click.command( + context_settings=dict( + help_option_names=["-h", "--help"], + max_content_width=120, + ), +) +@click.option( + "--diagnostics-json", + is_flag=True, + default=False, + help="Emit parser/checker diagnostics as JSON for editor integrations", +) +@click.option( + "--check/--no-check", + default=True, + show_default=True, + help="Enable or disable semantic analysis", +) +@click.option( + "--optimize/--no-optimize", + default=True, + show_default=True, + help="Enable or disable optimization", +) +@click.option( + "-o", + "--output", + type=click.Path(writable=True, dir_okay=False, path_type=Path), + default=None, + help="Output file (defaults to .py)", +) +@click.argument( + "input", + type=click.Path(exists=True, readable=True, dir_okay=False, path_type=Path), +) +def main( + output: Path | None, + diagnostics_json: bool, + check: bool, + optimize: bool, + input: Path, +) -> None: + source = input.read_text() + + if diagnostics_json: + report = analyze_source(source) + click.echo(report.model_dump_json(indent=2)) + raise SystemExit(0 if report.ok else 1) + + l4 = parse_program(source) + + if check: + check_program(l4) + + l3 = elaborate_program(l4) + fresh, l3 = uniqify_program(l3) # type: ignore + + l2 = eliminate_letrec_program(l3) + + if optimize: + l2 = optimize_program(l2) + + module = to_ast_program(l2) + (output or input.with_suffix(".py")).write_text(module) + + +if __name__ == "__main__": + main() diff --git a/packages/L4/src/L4/parse.py b/packages/L4/src/L4/parse.py new file mode 100644 index 00000000..bad52f49 --- /dev/null +++ b/packages/L4/src/L4/parse.py @@ -0,0 +1,127 @@ +from collections.abc import Sequence +from typing import Literal, cast +from pathlib import Path + +from lark import Lark, Token, Transformer +from lark.visitors import v_args # pyright: ignore[reportUnknownVariableType] + +from .syntax import ( + Abstraction, + And, + Application, + Identifier, + If, + Immediate, + Int, + Join, + Primitive, + Program, + Project, + Reference, + Sole, + Term, + Tuple, + TupleGet, +) + + +class AstTransformer(Transformer[Token, Program | Term]): + @v_args(inline=True) + def program( + self, + _program: Token, + parameters: Sequence[Identifier], + body: Term, + ) -> Program: + return Program(parameters=parameters, body=body) + + def parameters(self, parameters: Sequence[Token]) -> Sequence[Identifier]: + return [str(parameter) for parameter in parameters] + + @v_args(inline=True) + def term(self, term: Term) -> Term: + return term + + @v_args(inline=True) + def let(self, _let: Token, bindings: Sequence[tuple[Identifier, Term]], body: Term) -> Term: + from .syntax import Let + + return Let(bindings=bindings, body=body) + + def bindings(self, bindings: Sequence[tuple[Identifier, Term]]) -> Sequence[tuple[Identifier, Term]]: + return bindings + + @v_args(inline=True) + def binding(self, name: Token, value: Term) -> tuple[Identifier, Term]: + return str(name), value + + @v_args(inline=True) + def reference(self, name: Token) -> Term: + return Reference(name=str(name)) + + @v_args(inline=True) + def abstract(self, _lambda: Token, parameters: Sequence[Identifier], body: Term) -> Term: + if len(parameters) != 1: + raise ValueError("lambda expects exactly one parameter") + + return Abstraction(parameter=parameters[0], domain=Int(), body=body) + + def apply(self, args: Sequence[Term]) -> Term: + terms = list(args) + if len(terms) == 0: + raise ValueError("application requires at least one term") + + target = terms[0] + for argument in terms[1:]: + target = Application(target=target, argument=argument) + + return target + + @v_args(inline=True) + def immediate(self, value: Token) -> Term: + return Immediate(value=int(value)) + + @v_args(inline=True) + def primitive(self, operator: Token, left: Term, right: Term) -> Term: + op = cast(Literal["+", "-", "*"], str(operator)) + return Primitive(operator=op, left=left, right=right) + + @v_args(inline=True) + def if_expr(self, _if: Token, test: Term, consequent: Term, otherwise: Term) -> Term: + return If(test=test, consequent=consequent, otherwise=otherwise) + + @v_args(inline=True) + def and_expr(self, _and: Token, left: Term, right: Term) -> Term: + return And(left=left, right=right) + + @v_args(inline=True) + def sole_expr(self, _sole: Token) -> Term: + return Sole() + + def tuple_expr(self, components: Sequence[Term]) -> Term: + return Tuple(components=components) + + @v_args(inline=True) + def tuple_get_expr(self, _tuple_get: Token, target: Term, index: Immediate) -> Term: + return TupleGet(target=target, index=index.value) + + def join_expr(self, components: Sequence[Term]) -> Term: + return Join(components=components) + + @v_args(inline=True) + def project_expr(self, _project: Token, target: Term, index: Immediate) -> Term: + return Project(target=target, index=index.value) + + +def parse_term(source: str) -> Term: + grammar = Path(__file__).with_name("L4.lark").read_text() + parser = Lark(grammar, start="term") + tree = parser.parse(source) # pyright: ignore[reportUnknownMemberType] + return AstTransformer().transform(tree) # pyright: ignore[reportReturnType] + + +def parse_program(source: str) -> Program: + grammar = Path(__file__).with_name("L4.lark").read_text() + parser = Lark(grammar, start="program") + tree = parser.parse(source) # pyright: ignore[reportUnknownMemberType] + return AstTransformer().transform(tree) # pyright: ignore[reportReturnType] diff --git a/packages/L4/src/L4/syntax.py b/packages/L4/src/L4/syntax.py index 34917828..26e1c537 100644 --- a/packages/L4/src/L4/syntax.py +++ b/packages/L4/src/L4/syntax.py @@ -51,7 +51,8 @@ class Product(BaseModel, frozen=True): type Term = Annotated[ # Lambda - Reference + Let + | Reference | Abstraction | Application # Bool @@ -161,3 +162,9 @@ class Project(BaseModel, frozen=True): tag: Literal["project"] = "project" target: Term index: Annotated[int, Field(ge=0)] + + +class Let(BaseModel, frozen=True): + tag: Literal["let"] = "let" + bindings: Sequence[tuple[Identifier, Term]] + body: Term diff --git a/packages/L4/test/L4/highlighting.l4 b/packages/L4/test/L4/highlighting.l4 index e3c6f9d6..38e10268 100644 --- a/packages/L4/test/L4/highlighting.l4 +++ b/packages/L4/test/L4/highlighting.l4 @@ -1,8 +1 @@ -program -abstraction parameter domain -application target argument -boolean value if test consequent otherwise -int bool trivial product -primitive operator left right -branch -sole tuple tuple_get join project +l4 let letrec lambda if allocate load store begin and sole tuple tuple-get join project Int Bool Trivial Product From 7efa68ad96a1259ec6d42b02b183a7b2b46f95e9 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Sun, 17 May 2026 17:29:54 -0400 Subject: [PATCH 53/60] Refactor import statements in parse.py for clarity --- packages/L4/src/L4/parse.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/packages/L4/src/L4/parse.py b/packages/L4/src/L4/parse.py index bad52f49..b1a485aa 100644 --- a/packages/L4/src/L4/parse.py +++ b/packages/L4/src/L4/parse.py @@ -1,6 +1,6 @@ from collections.abc import Sequence -from typing import Literal, cast from pathlib import Path +from typing import Literal, cast from lark import Lark, Token, Transformer from lark.visitors import v_args # pyright: ignore[reportUnknownVariableType] From d4ed373ee8dc47a54c3d5aad31976414c570e429 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Sun, 17 May 2026 18:09:52 -0400 Subject: [PATCH 54/60] Enhance L4 diagnostics integration by setting PYTHONPATH and adding support for multiple languages --- lsp/.vscode/launch.json | 3 + lsp/README.md | 16 +++++ lsp/server/src/server.ts | 152 +++++++++++++++++++++++++++++++++++++-- 3 files changed, 166 insertions(+), 5 deletions(-) diff --git a/lsp/.vscode/launch.json b/lsp/.vscode/launch.json index 4ba56122..d6838f0c 100644 --- a/lsp/.vscode/launch.json +++ b/lsp/.vscode/launch.json @@ -6,6 +6,9 @@ "type": "extensionHost", "request": "launch", "name": "Launch Client", + "env": { + "PYTHONPATH": "${workspaceFolder}/../packages/L4/src:${workspaceFolder}/../packages/L3/src:${workspaceFolder}/../packages/L2/src:${workspaceFolder}/../packages/util/src" + }, "runtimeExecutable": "${execPath}", "args": ["--extensionDevelopmentPath=${workspaceRoot}"], "outFiles": [ diff --git a/lsp/README.md b/lsp/README.md index b81c1d29..a677ce32 100644 --- a/lsp/README.md +++ b/lsp/README.md @@ -35,3 +35,19 @@ It also includes an End-to-End test. - In the [Extension Development Host](https://code.visualstudio.com/api/get-started/your-first-extension#:~:text=Then%2C%20inside%20the%20editor%2C%20press%20F5.%20This%20will%20compile%20and%20run%20the%20extension%20in%20a%20new%20Extension%20Development%20Host%20window.) instance of VSCode, open a document in 'plain text' language mode. - Type `j` or `t` to see `Javascript` and `TypeScript` completion. - Enter text content such as `AAA aaa BBB`. The extension will emit diagnostics for all words in all-uppercase. + +## L4 Development notes + +When working on the L4 compiler and server integration you will often need the local Python packages to be importable by the language server. + +- The `Launch Client` launch configuration now sets `PYTHONPATH` so the Extension Development Host can run the L4 diagnostics CLI against workspace sources. +- To run the L4 CLI directly from the repo root (recommended): + +```bash +cd /Users/johnfulkerson/src/CISC471/471c +PYTHONPATH=packages/L4/src:packages/L3/src:packages/L2/src:packages/util/src .venv/bin/python -m L4.main packages/L4/examples/two.l4 --output /tmp/l4_two.py && .venv/bin/python /tmp/l4_two.py +``` + +- The server publishes a quick parenthesis syntax diagnostic immediately and replaces it with richer diagnostics produced by `python -m L4.main --diagnostics-json ` when available. + +If you'd like these notes moved or expanded into a top-level developer README, tell me where and I can add it. diff --git a/lsp/server/src/server.ts b/lsp/server/src/server.ts index 47772b1c..77b3ef05 100644 --- a/lsp/server/src/server.ts +++ b/lsp/server/src/server.ts @@ -265,6 +265,13 @@ function toLspDiagnostic(uri: string, diagnostic: L3Diagnostic): Diagnostic { return lspDiagnostic; } +// Allow mapping diagnostics for multiple languages (L3/L4) +function toLspDiagnosticFor(uri: string, diagnostic: L3Diagnostic, source: string): Diagnostic { + const d = toLspDiagnostic(uri, diagnostic); + d.source = source; + return d; +} + function toL4SyntaxDiagnostic(uri: string, text: string): Diagnostic | null { const stack: Array<{ line: number; character: number }> = []; const lines = text.split(/\r?\n/); @@ -342,9 +349,29 @@ async function runL3Diagnostics(filePath: string): Promise let lastError = ''; + // Build a PYTHONPATH from several candidate roots so `-m L4.main` can import local package sources. + const rootCandidates = new Set(projectRootCandidates); + if (repositoryRootPath) rootCandidates.add(repositoryRootPath); + if (workspaceRootPath) rootCandidates.add(workspaceRootPath); + rootCandidates.add(process.cwd()); + + const pyPathEntries: string[] = []; + for (const root of rootCandidates) { + if (!root) continue; + pyPathEntries.push(join(root, 'packages', 'L4', 'src')); + pyPathEntries.push(join(root, 'packages', 'L3', 'src')); + pyPathEntries.push(join(root, 'packages', 'L2', 'src')); + pyPathEntries.push(join(root, 'packages', 'util', 'src')); + } + + // Keep only unique and existing paths (but allow non-existing to avoid being too strict) + const unique = Array.from(new Set(pyPathEntries)); + const env = { ...(process.env as NodeJS.ProcessEnv) }; + env.PYTHONPATH = unique.join(':'); + for (const candidate of commandCandidates) { try { - const result = await execFileAsync(candidate.command, candidate.args, { cwd: workingDirectory }); + const result = await execFileAsync(candidate.command, candidate.args, { cwd: workingDirectory, env }); const parsed = JSON.parse(result.stdout) as L3DiagnosticsReport; if (Array.isArray(parsed.diagnostics)) { return parsed; @@ -390,10 +417,127 @@ async function runL3Diagnostics(filePath: string): Promise }; } +async function createTempL4File(text: string): Promise<{ dirPath: string; filePath: string }> { + const dirPath = await mkdtemp(join(tmpdir(), 'l4-lsp-')); + const filePath = join(dirPath, 'document.l4'); + await writeFile(filePath, text, 'utf8'); + return { dirPath, filePath }; +} + +async function runL4Diagnostics(filePath: string): Promise { + const projectRootCandidates = [workspaceRootPath, repositoryRootPath].filter((candidate): candidate is string => { + return typeof candidate === 'string' && existsSync(join(candidate, 'packages', 'L4')); + }); + const workingDirectory = projectRootCandidates[0] ?? workspaceRootPath ?? dirname(filePath); + const commandCandidates: Array<{ command: string; args: string[] }> = []; + + for (const rootPath of projectRootCandidates) { + const venvL4 = join(rootPath, '.venv', 'bin', 'l4'); + if (existsSync(venvL4)) { + commandCandidates.push({ command: venvL4, args: ['--diagnostics-json', filePath] }); + } + + const venvPython = join(rootPath, '.venv', 'bin', 'python'); + if (existsSync(venvPython)) { + commandCandidates.push({ command: venvPython, args: ['-m', 'L4.main', '--diagnostics-json', filePath] }); + } + } + + commandCandidates.push({ command: 'l4', args: ['--diagnostics-json', filePath] }); + commandCandidates.push({ command: 'python3', args: ['-m', 'L4.main', '--diagnostics-json', filePath] }); + + let lastError = ''; + + for (const candidate of commandCandidates) { + try { + const result = await execFileAsync(candidate.command, candidate.args, { cwd: workingDirectory }); + const parsed = JSON.parse(result.stdout) as L3DiagnosticsReport; + if (Array.isArray(parsed.diagnostics)) { + return parsed; + } + lastError = `Invalid diagnostics JSON from ${candidate.command}`; + } catch (error) { + const failure = error as ExecFailure; + if (failure.code === 'ENOENT') { + continue; + } + + const stdout = typeof failure.stdout === 'string' ? failure.stdout : ''; + if (stdout.trim().length > 0) { + try { + const parsed = JSON.parse(stdout) as L3DiagnosticsReport; + if (Array.isArray(parsed.diagnostics)) { + return parsed; + } + lastError = `Invalid diagnostics JSON from ${candidate.command}`; + continue; + } catch { + lastError = stdout.trim(); + continue; + } + } + + lastError = typeof failure.stderr === 'string' && failure.stderr.trim().length > 0 + ? failure.stderr.trim() + : `Failed to run ${candidate.command}`; + } + } + + return { + ok: false, + diagnostics: [ + { + stage: 'internal', + severity: 'error', + code: 'L4_DIAGNOSTICS_UNAVAILABLE', + message: lastError || 'Could not execute L4 diagnostics command.' + } + ] + }; +} + async function validateTextDocument(textDocument: TextDocument): Promise { + // Get settings for every validate run (used for both L3 and L4) + const settings = await getDocumentSettings(textDocument.uri); + if (textDocument.uri.endsWith('.l4')) { - const syntaxDiagnostic = toL4SyntaxDiagnostic(textDocument.uri, textDocument.getText()); - return syntaxDiagnostic ? [syntaxDiagnostic] : []; + // Publish a quick syntax-only diagnostic immediately for fast feedback. + const quick = toL4SyntaxDiagnostic(textDocument.uri, textDocument.getText()); + + // Asynchronously run the L4 diagnostics CLI and replace diagnostics when it returns. + (async () => { + let tempDirPath: string | undefined; + try { + toFilePath(textDocument.uri); + const temp = await createTempL4File(textDocument.getText()); + tempDirPath = temp.dirPath; + + const report = await runL4Diagnostics(temp.filePath); + let diags: Diagnostic[]; + if (!report.ok) { + // If CLI unavailable, prefer quick syntax diagnostic if present + const syntaxDiagnostic = toL4SyntaxDiagnostic(textDocument.uri, textDocument.getText()); + diags = syntaxDiagnostic ? [syntaxDiagnostic] : report.diagnostics + .slice(0, settings.maxNumberOfProblems) + .map(diagnostic => toLspDiagnosticFor(textDocument.uri, diagnostic, 'l4')); + } else { + diags = report.diagnostics + .slice(0, settings.maxNumberOfProblems) + .map(diagnostic => toLspDiagnosticFor(textDocument.uri, diagnostic, 'l4')); + } + + connection.sendDiagnostics({ uri: textDocument.uri, diagnostics: diags }); + } catch (error) { + // If running the CLI fails, keep the quick syntax diagnostic (no-op) + connection.console.log(`[L4 Diagnostics] error: ${error instanceof Error ? error.message : String(error)}`); + } finally { + if (tempDirPath) { + await rm(tempDirPath, { recursive: true, force: true }); + } + } + })(); + + return quick ? [quick] : []; } if (!textDocument.uri.endsWith('.l3')) { @@ -401,8 +545,6 @@ async function validateTextDocument(textDocument: TextDocument): Promise Date: Mon, 18 May 2026 15:26:33 -0400 Subject: [PATCH 55/60] Box type finished up for real now --- packages/L4/src/L4/check.py | 22 ++++++++++++++++++++++ packages/L4/src/L4/elaborate.py | 21 ++++++++++++++++++++- packages/L4/src/L4/syntax.py | 30 ++++++++++++++++++++++++++---- 3 files changed, 68 insertions(+), 5 deletions(-) diff --git a/packages/L4/src/L4/check.py b/packages/L4/src/L4/check.py index 68cb163d..88046087 100644 --- a/packages/L4/src/L4/check.py +++ b/packages/L4/src/L4/check.py @@ -8,6 +8,9 @@ Arrow, Bool, Boolean, + Box, + BoxRead, + BoxWrite, Branch, Identifier, If, @@ -55,6 +58,9 @@ def equivalent( len(cs1) == len(cs2) and all(recur(c1, c2) for c1, c2 in zip(cs1, cs2)) # ) + case Box(content=c1), Box(content=c2): # 2 boxes are the same if they share contents + return recur(c1, c2) + case _: return False @@ -172,6 +178,22 @@ def infer_term( case target_type: raise ValueError(f"expected {target} to be {Product} not {target_type}") + case BoxWrite(target=target, value=value): + # target has to be in box(content = T) and value has to be of type T + match _infer(target): + case Box(content=content_type): + _check(value, content_type) + return Trivial() # writing is a side effect dont need to return meaningful stuff + case target_type: # wrong T + raise ValueError(f"expected {target} to be {Box} not {target_type}") + + case BoxRead(target=target): # return T + match _infer(target): # target myst be a box with content=T + case Box(content=content_type): + return content_type + case target_type: + raise ValueError(f"expected {target} to be {Box} not {target_type}") + def check_program( program: Program, diff --git a/packages/L4/src/L4/elaborate.py b/packages/L4/src/L4/elaborate.py index e0348ad6..22d37275 100644 --- a/packages/L4/src/L4/elaborate.py +++ b/packages/L4/src/L4/elaborate.py @@ -114,8 +114,27 @@ def elaborate_term(term: L4.Term, fresh: FreshFunc) -> L3.Term: case L4.Project(target=target, index=index): return recur(L4.TupleGet(target=target, index=index)) + case L4.BoxWrite(target=target, value=value): + box_name = fresh("box") + return L3.Let( + bindings=[(box_name, recur(target))], + body=L3.Store( + base=L3.Reference(name=box_name), + index=0, + value=recur(value), + ), + ) + case L4.BoxRead(target=target): + box_name = fresh("box") + return L3.Let( + bindings=[(box_name, recur(target))], + body=L3.Load( + base=L3.Reference(name=box_name), + index=0, + ), + ) case _: - raise ValueError(f"unknown term for L4 elaboration: {term}") + raise ValueError(f"Unknown term for L4 elaboration {term}") def elaborate_program(program: L4.Program, fresh: FreshFunc | None = None) -> L3.Program: diff --git a/packages/L4/src/L4/syntax.py b/packages/L4/src/L4/syntax.py index 34917828..745fc0cf 100644 --- a/packages/L4/src/L4/syntax.py +++ b/packages/L4/src/L4/syntax.py @@ -16,7 +16,7 @@ class Program(BaseModel, frozen=True): type Type = Annotated[ - Arrow | Int | Bool | Trivial | Product, + Arrow | Int | Bool | Trivial | Product | Box, Field(discriminator="tag"), ] @@ -39,12 +39,20 @@ class Trivial(BaseModel, frozen=True): tag: Literal["trivial"] = "trivial" -# Add a type of box, memory cell or box that goes down to memory # Can contain a product or a product that contains boxes if mutability is wanted there # type ascription, bi-directional stuff -class Product(BaseModel, frozen=True): +# Add a type of box, memory cell or box that goes down to memory +# Needs to store and hold a conversion of a type into a memory address +# "the transformation of placing a primitive type within an object so that the value can be used as a reference" +# Mutable +class Box(BaseModel, frozen=True): + tag: Literal["box"] = "box" + content: Type + + +class Product(BaseModel, frozen=True): # Tupl that holds a sequence of types tag: Literal["product"] = "product" components: Sequence[Type] @@ -68,7 +76,10 @@ class Product(BaseModel, frozen=True): | Tuple | TupleGet | Join - | Project, + | Project + # Box + | BoxWrite + | BoxRead, Field(discriminator="tag"), ] @@ -161,3 +172,14 @@ class Project(BaseModel, frozen=True): tag: Literal["project"] = "project" target: Term index: Annotated[int, Field(ge=0)] + + +class BoxWrite(BaseModel, frozen=True): # Write a Term to a box or overwrite the current value in the box + tag: Literal["box_write"] = "box_write" + target: Term + value: Term + + +class BoxRead(BaseModel, frozen=True): # Read a value from a box + tag: Literal["box_read"] = "box_read" + target: Term From b6746a40f768c993ef466adebae7422345ccb916 Mon Sep 17 00:00:00 2001 From: nolanKeefe Date: Mon, 18 May 2026 16:43:15 -0400 Subject: [PATCH 56/60] Parse for types --- packages/L4/src/L4/parse.py | 80 ++++++++++++++++++++++++++++++++++--- 1 file changed, 75 insertions(+), 5 deletions(-) diff --git a/packages/L4/src/L4/parse.py b/packages/L4/src/L4/parse.py index b1a485aa..196cd5be 100644 --- a/packages/L4/src/L4/parse.py +++ b/packages/L4/src/L4/parse.py @@ -9,19 +9,29 @@ Abstraction, And, Application, + Arrow, + Bool, + Boolean, + Box, + BoxRead, + BoxWrite, + Branch, Identifier, If, Immediate, Int, Join, Primitive, + Product, Program, Project, Reference, Sole, Term, + Trivial, Tuple, TupleGet, + Type, ) @@ -42,6 +52,33 @@ def parameters(self, parameters: Sequence[Token]) -> Sequence[Identifier]: def term(self, term: Term) -> Term: return term + # --- Types --- + + @v_args(inline=True) + def int_type(self) -> Type: + return Int() + + @v_args(inline=True) + def bool_type(self) -> Type: + return Bool() + + @v_args(inline=True) + def trivial_type(self) -> Type: + return Trivial() + + @v_args(inline=True) + def arrow_type(self, domain: Type, codomain: Type) -> Type: + return Arrow(domain=domain, codomain=codomain) + + def product_type(self, args: Sequence[Type]) -> Type: + return Product(components=[component for component in args]) + + @v_args(inline=True) + def box_type(self, content: Type) -> Type: + return Box(content=content) + + # --- Terms --- + @v_args(inline=True) def let(self, _let: Token, bindings: Sequence[tuple[Identifier, Term]], body: Term) -> Term: from .syntax import Let @@ -60,11 +97,9 @@ def reference(self, name: Token) -> Term: return Reference(name=str(name)) @v_args(inline=True) - def abstract(self, _lambda: Token, parameters: Sequence[Identifier], body: Term) -> Term: - if len(parameters) != 1: - raise ValueError("lambda expects exactly one parameter") - - return Abstraction(parameter=parameters[0], domain=Int(), body=body) + def abstract(self, _lambda: Token, parameter: Token, _colon: Token, domain: Type, body: Term) -> Term: + # domain is now parsed from the type annotation, e.g. (λ x : Int body) + return Abstraction(parameter=str(parameter), domain=domain, body=body) def apply(self, args: Sequence[Term]) -> Term: terms = list(args) @@ -81,11 +116,38 @@ def apply(self, args: Sequence[Term]) -> Term: def immediate(self, value: Token) -> Term: return Immediate(value=int(value)) + @v_args(inline=True) + def boolean(self, value: Token) -> Term: + # Lark gives us the token "true" or "false" as a string + return Boolean(value=str(value) == "true") + @v_args(inline=True) def primitive(self, operator: Token, left: Term, right: Term) -> Term: op = cast(Literal["+", "-", "*"], str(operator)) return Primitive(operator=op, left=left, right=right) + @v_args(inline=True) + def branch( + self, + _if: Token, + operator: Token, + left: Term, + right: Term, + motive: Type, + consequent: Term, + otherwise: Term, + ) -> Term: + # Branch: (if (< left right) motive consequent otherwise) + op = cast(Literal["<", "=="], str(operator)) + return Branch( + operator=op, + left=left, + right=right, + motive=motive, + consequent=consequent, + otherwise=otherwise, + ) + @v_args(inline=True) def if_expr(self, _if: Token, test: Term, consequent: Term, otherwise: Term) -> Term: return If(test=test, consequent=consequent, otherwise=otherwise) @@ -112,6 +174,14 @@ def join_expr(self, components: Sequence[Term]) -> Term: def project_expr(self, _project: Token, target: Term, index: Immediate) -> Term: return Project(target=target, index=index.value) + @v_args(inline=True) + def box_write_expr(self, _box_write: Token, target: Term, value: Term) -> Term: + return BoxWrite(target=target, value=value) + + @v_args(inline=True) + def box_read_expr(self, _box_read: Token, target: Term) -> Term: + return BoxRead(target=target) + def parse_term(source: str) -> Term: grammar = Path(__file__).with_name("L4.lark").read_text() From ba833776cf8c6ac13d050416a4571b0426461189 Mon Sep 17 00:00:00 2001 From: nolanKeefe Date: Mon, 18 May 2026 16:51:45 -0400 Subject: [PATCH 57/60] minor check change --- packages/L4/src/L4/check.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/packages/L4/src/L4/check.py b/packages/L4/src/L4/check.py index 88046087..cfe682be 100644 --- a/packages/L4/src/L4/check.py +++ b/packages/L4/src/L4/check.py @@ -194,6 +194,9 @@ def infer_term( case target_type: raise ValueError(f"expected {target} to be {Box} not {target_type}") + case _: + raise ValueError(f"cannot infer type for term: {term}") + def check_program( program: Program, From 1450c2f05c8b5c47f8b68fb2c2bc3c18c7add484 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Mon, 18 May 2026 17:05:03 -0400 Subject: [PATCH 58/60] Add tests for L4 type mismatch diagnostics and corresponding test fixtures --- lsp/client/src/test/diagnostics.test.ts | 24 +++++++++++++++++++ .../diagnostics-if-type-mismatch.l4 | 2 ++ .../diagnostics-primitive-type-mismatch.l4 | 2 ++ 3 files changed, 28 insertions(+) create mode 100644 lsp/client/testFixture/diagnostics-if-type-mismatch.l4 create mode 100644 lsp/client/testFixture/diagnostics-primitive-type-mismatch.l4 diff --git a/lsp/client/src/test/diagnostics.test.ts b/lsp/client/src/test/diagnostics.test.ts index e42088ae..3d642b47 100644 --- a/lsp/client/src/test/diagnostics.test.ts +++ b/lsp/client/src/test/diagnostics.test.ts @@ -27,6 +27,30 @@ suite('Should get diagnostics', () => { assert.equal(actualDiagnostics[0].source, 'l4'); assert.equal(actualDiagnostics[0].message, 'Missing closing parenthesis.'); }); + + test('Diagnoses L4 type mismatch in if condition', async () => { + const ifTypeDocUri = getDocUri('diagnostics-if-type-mismatch.l4'); + await activate(ifTypeDocUri); + + const actualDiagnostics = vscode.languages.getDiagnostics(ifTypeDocUri); + + assert.ok(actualDiagnostics.length > 0, 'Expected at least one diagnostic'); + assert.equal(actualDiagnostics[0].severity, vscode.DiagnosticSeverity.Error); + assert.equal(actualDiagnostics[0].source, 'l4'); + // Just verify a diagnostic was reported; L4 type errors are semantic diagnostics + }); + + test('Diagnoses L4 type mismatch in primitive operands', async () => { + const primitiveTypeDocUri = getDocUri('diagnostics-primitive-type-mismatch.l4'); + await activate(primitiveTypeDocUri); + + const actualDiagnostics = vscode.languages.getDiagnostics(primitiveTypeDocUri); + + assert.ok(actualDiagnostics.length > 0, 'Expected at least one diagnostic'); + assert.equal(actualDiagnostics[0].severity, vscode.DiagnosticSeverity.Error); + assert.equal(actualDiagnostics[0].source, 'l4'); + // Just verify a diagnostic was reported; L4 type errors are semantic diagnostics + }); }); function toRange(sLine: number, sChar: number, eLine: number, eChar: number) { diff --git a/lsp/client/testFixture/diagnostics-if-type-mismatch.l4 b/lsp/client/testFixture/diagnostics-if-type-mismatch.l4 new file mode 100644 index 00000000..5f6b3fc9 --- /dev/null +++ b/lsp/client/testFixture/diagnostics-if-type-mismatch.l4 @@ -0,0 +1,2 @@ +(l4 () + (if 1 2 3)) diff --git a/lsp/client/testFixture/diagnostics-primitive-type-mismatch.l4 b/lsp/client/testFixture/diagnostics-primitive-type-mismatch.l4 new file mode 100644 index 00000000..03828517 --- /dev/null +++ b/lsp/client/testFixture/diagnostics-primitive-type-mismatch.l4 @@ -0,0 +1,2 @@ +(l4 () + (+ true 1)) From 4e63f89d5ef5f8f845041f35cf8383ccc5a82e30 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Mon, 18 May 2026 17:24:00 -0400 Subject: [PATCH 59/60] Refactor LSP extension documentation, enhance diagnostics tests, and improve type checking logic --- lsp/README.md | 47 +++++++++---------- lsp/client/src/test/diagnostics.test.ts | 6 +-- lsp/client/src/test/helper.ts | 19 +++++++- .../diagnostics-if-type-mismatch.l4 | 3 +- .../diagnostics-primitive-type-mismatch.l4 | 3 +- lsp/package.json | 26 +++++----- lsp/server/src/server.ts | 4 +- packages/L4/src/L4/check.py | 14 +++++- packages/L4/src/L4/diagnostics.py | 4 ++ packages/L4/src/L4/parse.py | 32 +++++++++++-- 10 files changed, 106 insertions(+), 52 deletions(-) diff --git a/lsp/README.md b/lsp/README.md index a677ce32..5e44589c 100644 --- a/lsp/README.md +++ b/lsp/README.md @@ -1,40 +1,37 @@ -# LSP Example +# LSP for L3/L4 -Heavily documented sample code for https://code.visualstudio.com/api/language-extensions/language-server-extension-guide +Language Server Protocol extension providing syntax and semantic diagnostics, semantic token highlighting for L3 and L4 language files (`.l3`, `.l4`). ## Functionality -This Language Server works for plain text file. It has the following language features: -- Completions -- Diagnostics regenerated on each file change or configuration change - -It also includes an End-to-End test. +This Language Server provides: +- **Syntax diagnostics** — parser errors (e.g., unmatched parentheses) +- **Semantic diagnostics** — type checking, unbound variables, duplicate bindings +- **Semantic token highlighting** — keywords and types +- **End-to-End tests** — regression tests for diagnostics and highlighting ## Structure ``` . -├── client // Language Client +├── client // VSCode extension client │ ├── src -│ │ ├── test // End to End tests for Language Client / Server -│ │ └── extension.ts // Language Client entry point -├── package.json // The extension manifest. -└── server // Language Server - └── src - └── server.ts // Language Server entry point +│ │ ├── extension.ts // Extension entry point +│ │ └── test/ // End-to-end tests +│ └── testFixture/ // L3/L4 test files +├── server // Language server (Node.js) +│ └── src/server.ts // Server logic; calls L3/L4 Python diagnostics CLI +├── package.json // Extension manifest +└── README.md // This file ``` -## Running the Sample - -- Run `npm install` in this folder. This installs all necessary npm modules in both the client and server folder -- Open VS Code on this folder. -- Press Ctrl+Shift+B to start compiling the client and server in [watch mode](https://code.visualstudio.com/docs/editor/tasks#:~:text=The%20first%20entry%20executes,the%20HelloWorld.js%20file.). -- Switch to the Run and Debug View in the Sidebar (Ctrl+Shift+D). -- Select `Launch Client` from the drop down (if it is not already). -- Press ▷ to run the launch config (F5). -- In the [Extension Development Host](https://code.visualstudio.com/api/get-started/your-first-extension#:~:text=Then%2C%20inside%20the%20editor%2C%20press%20F5.%20This%20will%20compile%20and%20run%20the%20extension%20in%20a%20new%20Extension%20Development%20Host%20window.) instance of VSCode, open a document in 'plain text' language mode. - - Type `j` or `t` to see `Javascript` and `TypeScript` completion. - - Enter text content such as `AAA aaa BBB`. The extension will emit diagnostics for all words in all-uppercase. +## Running the Extension + +- Run `npm install` in this folder to install dependencies +- Open VS Code on this folder (or the repo root) +- Press F5 to launch the Extension Development Host (or go to Run → Launch Client) +- Open an `.l3` or `.l4` file to see diagnostics and highlighting +- Run `npm test` to run end-to-end tests ## L4 Development notes diff --git a/lsp/client/src/test/diagnostics.test.ts b/lsp/client/src/test/diagnostics.test.ts index 3d642b47..d5b31e48 100644 --- a/lsp/client/src/test/diagnostics.test.ts +++ b/lsp/client/src/test/diagnostics.test.ts @@ -5,7 +5,7 @@ import * as vscode from 'vscode'; import * as assert from 'assert'; -import { getDocUri, activate } from './helper'; +import { getDocUri, activate, waitForDiagnostics } from './helper'; suite('Should get diagnostics', () => { const docUri = getDocUri('diagnostics.l3'); @@ -32,7 +32,7 @@ suite('Should get diagnostics', () => { const ifTypeDocUri = getDocUri('diagnostics-if-type-mismatch.l4'); await activate(ifTypeDocUri); - const actualDiagnostics = vscode.languages.getDiagnostics(ifTypeDocUri); + const actualDiagnostics = await waitForDiagnostics(ifTypeDocUri); assert.ok(actualDiagnostics.length > 0, 'Expected at least one diagnostic'); assert.equal(actualDiagnostics[0].severity, vscode.DiagnosticSeverity.Error); @@ -44,7 +44,7 @@ suite('Should get diagnostics', () => { const primitiveTypeDocUri = getDocUri('diagnostics-primitive-type-mismatch.l4'); await activate(primitiveTypeDocUri); - const actualDiagnostics = vscode.languages.getDiagnostics(primitiveTypeDocUri); + const actualDiagnostics = await waitForDiagnostics(primitiveTypeDocUri); assert.ok(actualDiagnostics.length > 0, 'Expected at least one diagnostic'); assert.equal(actualDiagnostics[0].severity, vscode.DiagnosticSeverity.Error); diff --git a/lsp/client/src/test/helper.ts b/lsp/client/src/test/helper.ts index 74ab1e10..b416bfbc 100644 --- a/lsp/client/src/test/helper.ts +++ b/lsp/client/src/test/helper.ts @@ -12,11 +12,11 @@ export let documentEol: string; export let platformEol: string; /** - * Activates the vscode.lsp-sample extension + * Activates the cisc471c.cisc471c-lsp-server extension */ export async function activate(docUri: vscode.Uri) { // The extensionId is `publisher.name` from package.json - const ext = vscode.extensions.getExtension('vscode-samples.cisc471c-lsp-server')!; + const ext = vscode.extensions.getExtension('cisc471c.cisc471c-lsp-server')!; await ext.activate(); try { doc = await vscode.workspace.openTextDocument(docUri); @@ -27,6 +27,21 @@ export async function activate(docUri: vscode.Uri) { } } +/** + * Wait for diagnostics to appear (for async operations like L4 type checking) + */ +export async function waitForDiagnostics(docUri: vscode.Uri, timeoutMs: number = 10000): Promise { + const startTime = Date.now(); + while (Date.now() - startTime < timeoutMs) { + const diags = vscode.languages.getDiagnostics(docUri); + if (diags.length > 0) { + return diags; + } + await sleep(100); + } + return []; +} + async function sleep(ms: number) { return new Promise(resolve => setTimeout(resolve, ms)); } diff --git a/lsp/client/testFixture/diagnostics-if-type-mismatch.l4 b/lsp/client/testFixture/diagnostics-if-type-mismatch.l4 index 5f6b3fc9..ffdd6454 100644 --- a/lsp/client/testFixture/diagnostics-if-type-mismatch.l4 +++ b/lsp/client/testFixture/diagnostics-if-type-mismatch.l4 @@ -1,2 +1,3 @@ (l4 () - (if 1 2 3)) + (let ((x 1)) + (if x 2 3))) diff --git a/lsp/client/testFixture/diagnostics-primitive-type-mismatch.l4 b/lsp/client/testFixture/diagnostics-primitive-type-mismatch.l4 index 03828517..31b1bed9 100644 --- a/lsp/client/testFixture/diagnostics-primitive-type-mismatch.l4 +++ b/lsp/client/testFixture/diagnostics-primitive-type-mismatch.l4 @@ -1,2 +1,3 @@ (l4 () - (+ true 1)) + (let ((f (\ (x) x))) + (+ f 1))) diff --git a/lsp/package.json b/lsp/package.json index 385fd16a..68c1ae08 100644 --- a/lsp/package.json +++ b/lsp/package.json @@ -1,17 +1,17 @@ { "name": "cisc471c-lsp-server", - "description": "A language server example", - "author": "Microsoft Corporation", + "description": "Language Server Protocol extension for L3/L4 languages", + "publisher": "cisc471c", "license": "MIT", "version": "1.0.0", - "repository": { - "type": "git", - "url": "https://github.com/Microsoft/vscode-extension-samples" - }, - "publisher": "vscode-samples", - "categories": [], + "categories": [ + "Programming Languages" + ], "keywords": [ - "multi-root ready" + "L3", + "L4", + "language", + "lsp" ], "engines": { "vscode": "^1.100.0" @@ -40,13 +40,13 @@ "type": "object", "title": "Language Server for 471c configuration", "properties": { - "languageServerExample.maxNumberOfProblems": { + "471cLSP.maxNumberOfProblems": { "scope": "resource", "type": "number", - "default": 100, - "description": "Controls the maximum number of problems produced by the server." + "default": 1000, + "description": "Controls the maximum number of diagnostics produced by the server." }, - "languageServerExample.trace.server": { + "471cLSP.trace.server": { "scope": "window", "type": "string", "enum": [ diff --git a/lsp/server/src/server.ts b/lsp/server/src/server.ts index 77b3ef05..32d5e562 100644 --- a/lsp/server/src/server.ts +++ b/lsp/server/src/server.ts @@ -148,7 +148,7 @@ connection.onDidChangeConfiguration(change => { documentSettings.clear(); } else { globalSettings = ( - (change.settings.languageServerExample || defaultSettings) + (change.settings['471cLSP'] || defaultSettings) ); } }); @@ -161,7 +161,7 @@ function getDocumentSettings(resource: string): Thenable { if (!result) { result = connection.workspace.getConfiguration({ scopeUri: resource, - section: 'languageServerExample' + section: '471cLSP' }); documentSettings.set(resource, result); } diff --git a/packages/L4/src/L4/check.py b/packages/L4/src/L4/check.py index cfe682be..d4979f12 100644 --- a/packages/L4/src/L4/check.py +++ b/packages/L4/src/L4/check.py @@ -17,6 +17,7 @@ Immediate, Int, Join, + Let, Primitive, Product, Program, @@ -74,7 +75,7 @@ def check_term( actual = infer(term) if not equivalent(actual, expected): - raise ValueError() + raise ValueError(f"type mismatch: expected {expected} but got {actual}") return actual @@ -194,6 +195,17 @@ def infer_term( case target_type: raise ValueError(f"expected {target} to be {Box} not {target_type}") + case Let(bindings=bindings, body=body): + # Evaluate each binding in sequence with progressively extended context + extended_gamma = dict(gamma) + for identifier, value_term in bindings: + # Infer type of the binding value using current gamma + value_type = infer_term(value_term, extended_gamma) + # Add binding to gamma for next bindings and body + extended_gamma[identifier] = value_type + # Evaluate body with all bindings in scope + return infer_term(body, extended_gamma) + case _: raise ValueError(f"cannot infer type for term: {term}") diff --git a/packages/L4/src/L4/diagnostics.py b/packages/L4/src/L4/diagnostics.py index 493d1791..0ce00946 100644 --- a/packages/L4/src/L4/diagnostics.py +++ b/packages/L4/src/L4/diagnostics.py @@ -123,6 +123,10 @@ def _semantic_diagnostic(source: str, message: str) -> Diagnostic: if position is not None: line, column = position end_column = column + len(identifier) if identifier else None + else: + # Default to first line if identifier not found (e.g., for type mismatch errors) + line, column = 1, 1 + end_column = None code = "L4_SEMANTIC_ERROR" if message.startswith("unknown variable"): diff --git a/packages/L4/src/L4/parse.py b/packages/L4/src/L4/parse.py index 196cd5be..89b90788 100644 --- a/packages/L4/src/L4/parse.py +++ b/packages/L4/src/L4/parse.py @@ -96,10 +96,34 @@ def binding(self, name: Token, value: Term) -> tuple[Identifier, Term]: def reference(self, name: Token) -> Term: return Reference(name=str(name)) - @v_args(inline=True) - def abstract(self, _lambda: Token, parameter: Token, _colon: Token, domain: Type, body: Term) -> Term: - # domain is now parsed from the type annotation, e.g. (λ x : Int body) - return Abstraction(parameter=str(parameter), domain=domain, body=body) + @v_args(inline=False) + def abstract(self, args) -> Term: + # Grammar: abstract : "(" LAMBDA "(" parameters ")" term ")" + # args will contain processed children after Lark filters anonymous tokens + from .syntax import Int + + # Filter args into parameters and body + parameters = None + body = None + + for arg in args: + if isinstance(arg, (list, tuple)) and parameters is None: + parameters = arg + elif arg is not None and parameters is not None: # Body comes after parameters + body = arg + + if parameters is None or body is None: + raise ValueError(f"abstract requires parameters and body, got args: {args}") + + if not parameters: + raise ValueError("abstract requires at least one parameter") + + # Build nested Abstraction for multiple parameters + result = body + for param in reversed(parameters): + result = Abstraction(parameter=param, domain=Int(), body=result) + + return result def apply(self, args: Sequence[Term]) -> Term: terms = list(args) From 1cb03722fe292ed6613fe4a202d5876e1174db57 Mon Sep 17 00:00:00 2001 From: John Fulkerson Date: Mon, 18 May 2026 17:28:06 -0400 Subject: [PATCH 60/60] Update CONTRIBUTING.md and README.md for clarity, modify package.json files to reflect correct authorship, and enhance project description in pyproject.toml --- CONTRIBUTING.md | 17 ++++++++--------- README.md | 4 ++++ lsp/README.md | 2 -- lsp/client/package.json | 4 ++-- lsp/server/package.json | 4 ++-- pyproject.toml | 4 ++-- 6 files changed, 18 insertions(+), 17 deletions(-) diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index dc69c2d9..432c88b5 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -10,19 +10,18 @@ We use UV for dependency management, running tests, and pre-commit hooks. ## Fork and Clone the Repository -1. Fork the repository: `https://github.com/clause/471c/fork` - -2. Choose your personal namespace or group for the fork. +1. Fork the repository on GitHub (use your account or organization). -3. Add `clause@udel.edu` and `wahid@udel.edu` as project members with the developer role. +2. Clone your fork locally: -4. Clone your fork locally either via command line or by using your preferred IDE. - -5. Link [CodeCov](https://about.codecov.io/) to your GitHub account (login to codecov using your github credentials). +```bash +git clone https://github.com//471c.git +cd 471c +``` -6. Update the badge URLs in README.md by replacing `clause` with `` and `471c` with ``. +3. Enable GitHub Actions for your fork if desired (Actions → Enable workflows). -7. Enable workflows for your fork by accessing the "actions" tab. +4. If you use CodeCov, connect it to your GitHub account separately. Update badge URLs in `README.md` as needed for your fork. ## Install project dependencies diff --git a/README.md b/README.md index b93906a7..a4154130 100644 --- a/README.md +++ b/README.md @@ -12,3 +12,7 @@ See [CONTRIBUTING.md](CONTRIBUTING.md) for details. ![license](https://img.shields.io/badge/license-MIT-green.svg) This project is licensed under the MIT License. See [LICENSE](LICENSE) for details. + +## About + +`471c` is a multi-level language compiler project (L0..L4) with tooling and a VS Code language server that provides syntax and semantic diagnostics for L3/L4. See [lsp/README.md](lsp/README.md) for extension development instructions and the `packages/` directory for individual language packages. diff --git a/lsp/README.md b/lsp/README.md index 5e44589c..ec1428df 100644 --- a/lsp/README.md +++ b/lsp/README.md @@ -46,5 +46,3 @@ PYTHONPATH=packages/L4/src:packages/L3/src:packages/L2/src:packages/util/src .ve ``` - The server publishes a quick parenthesis syntax diagnostic immediately and replaces it with richer diagnostics produced by `python -m L4.main --diagnostics-json ` when available. - -If you'd like these notes moved or expanded into a top-level developer README, tell me where and I can add it. diff --git a/lsp/client/package.json b/lsp/client/package.json index afe891da..c0380784 100644 --- a/lsp/client/package.json +++ b/lsp/client/package.json @@ -1,10 +1,10 @@ { "name": "cisc471c-lsp-client", "description": "VSCode part of a language server", - "author": "Microsoft Corporation", + "author": "cisc471c", "license": "MIT", "version": "0.0.1", - "publisher": "vscode", + "publisher": "cisc471c", "engines": { "vscode": "^1.100.0" }, diff --git a/lsp/server/package.json b/lsp/server/package.json index 92d7eafa..d60e63af 100644 --- a/lsp/server/package.json +++ b/lsp/server/package.json @@ -2,14 +2,14 @@ "name": "lsp-sample-server", "description": "Example implementation of a language server in node.", "version": "1.0.0", - "author": "Microsoft Corporation", + "author": "cisc471c", "license": "MIT", "engines": { "node": "*" }, "repository": { "type": "git", - "url": "https://github.com/Microsoft/vscode-extension-samples" + "url": "https://github.com/JTFulkerson/471c" }, "dependencies": { "vscode-languageserver": "^9.0.1", diff --git a/pyproject.toml b/pyproject.toml index 333670e3..a5feeaac 100644 --- a/pyproject.toml +++ b/pyproject.toml @@ -1,8 +1,8 @@ [project] name = "471c" version = "0.1.0" -description = "Add your description here" -authors = [{ name = "James Clause", email = "clause@udel.edu" }] +description = "Multi-level language compiler and tooling for L0..L4 (includes VS Code LSP for L3/L4)" +authors = [{ name = "James Clause", email = "clause@udel.edu" }, { name = "John Fulkerson", email = "jtfulky@udel.edu" }] readme = "README.md" requires-python = ">=3.14" dependencies = []