Add parser and semantic analysis support for when blocks (#504)#504
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Add parser and semantic analysis support for when blocks (#504)#504daniellerozenblit wants to merge 4 commits intofacebook:devfrom
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Summary: Pull Request resolved: facebook#486 # Stack The goal of this stack is to add support for Parameterized Records to sddl2. # Diff This diff adds parsing and semantic analysis support for parameterized records in SDDL2. Parameterized records allow record types to accept parameters that can be used within field definitions, enabling more flexible type definitions. ## Key Changes - **ASTCall node:** New AST node type representing a parameterized record instantiation (e.g., `Entry(N)`). Contains a target (the record type) and arguments. - **CallRule grammar:** New grammar rule that parses parenthesized argument lists after identifiers as function calls, enabling syntax like `Foo(3, 5)`. - **SemanticAnalyzer updates:** - Extended `analyze(ASTRecord)` to validate record parameters are variable names and introduce them as NUMERIC types within the record scope. - Added `analyze(ASTCall)` to validate the target resolves to a record type, argument count matches parameter count, and all arguments are numeric. - Updated `analyzeMember()` to add record params to scope when accessing fields. - **Optimizer passes:** Extended ConstFoldPass and DeadVarPass to handle the new ASTCall node type. - **CodeGenerator:** Added stub for CALL handling (implementation in next diff). Differential Revision: D95827616
Summary: Pull Request resolved: facebook#487 # Stack The goal of this stack is to add support for Parameterized Records to sddl2. # Diff This diff adds code generation support for parameterized records in SDDL2, allowing records to accept parameters that can be used in field definitions. ## Key Changes - **bindParams():** New helper function that binds record parameters to registers before generating record body code. Parameters are temporarily assigned to registers so field expressions can reference them. - **generateType() for CALL:** Added handling for ConvertedNodeType::CALL which resolves the target record type, binds parameters, generates the record body, then restores registers. - **generateMember():** Extended to handle parameterized records by detecting CALL nodes and binding parameters before walking through record fields. - **generateAssign():** Modified to detect parameterized records (records with non-empty params) and store them as type aliases without generating code, deferring code generation until instantiation. - **generateAssume():** Extended to support CALL nodes alongside records for assume operations. Differential Revision: D95827634
Summary: ## Stack The goal of this stack is to add support for conditional `when` blocks to sddl. ## Diff Refactor `ConstFoldPass` and `DeadVarPass` optimizer implementations to improve code organization, reduce duplication, and establish consistent naming conventions. This is a pure refactor with no behavioral changes—prepares the optimizer infrastructure for upcoming `when` block support. Differential Revision: D96342197
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@daniellerozenblit has exported this pull request. If you are a Meta employee, you can view the originating Diff in D96342217. |
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Summary:
## Stack
The goal of this stack is to add support for conditional `when` blocks to sddl.
## Diff
This diff adds parsing and semantic analysis support for `when` blocks in sddl..
### Changes
- **ASTWhen node:** New AST node type representing a conditional `when` block. Contains a condition expression and a body of statements.
- **WhenRule grammar:** New grammar rule that parses `when <expr> { <statements> }` syntax.
- **SemanticAnalyzer:** Added `analyze(ASTWhen)` to validate the condition is numeric and recursively analyze the body statements.
Differential Revision: D96342217
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Summary:
## Stack
The goal of this stack is to add support for conditional `when` blocks to sddl.
## Diff
This diff adds parsing and semantic analysis support for `when` blocks in sddl..
### Changes
- **ASTWhen node:** New AST node type representing a conditional `when` block. Contains a condition expression and a body of statements.
- **WhenRule grammar:** New grammar rule that parses `when <expr> { <statements> }` syntax.
- **SemanticAnalyzer:** Added `analyze(ASTWhen)` to validate the condition is numeric and recursively analyze the body statements.
Differential Revision: D96342217
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Summary: Pull Request resolved: facebook#504 ## Stack The goal of this stack is to add support for conditional `when` blocks to sddl. ## Diff This diff adds parsing and semantic analysis support for `when` blocks in sddl.. ### Changes - **ASTWhen node:** New AST node type representing a conditional `when` block. Contains a condition expression and a body of statements. - **WhenRule grammar:** New grammar rule that parses `when <expr> { <statements> }` syntax. - **SemanticAnalyzer:** Added `analyze(ASTWhen)` to validate the condition is numeric and recursively analyze the body statements. Differential Revision: D96342217
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Mar 12, 2026
Summary:
## Stack
The goal of this stack is to add support for conditional `when` blocks to sddl.
## Diff
This diff adds parsing and semantic analysis support for `when` blocks in sddl..
### Changes
- **ASTWhen node:** New AST node type representing a conditional `when` block. Contains a condition expression and a body of statements.
- **WhenRule grammar:** New grammar rule that parses `when <expr> { <statements> }` syntax.
- **SemanticAnalyzer:** Added `analyze(ASTWhen)` to validate the condition is numeric and recursively analyze the body statements.
Differential Revision: D96342217
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Summary:
Stack
The goal of this stack is to add support for conditional
whenblocks to sddl.Diff
This diff adds parsing and semantic analysis support for
whenblocks in sddl..Changes
ASTWhen node: New AST node type representing a conditional
whenblock. Contains a condition expression and a body of statements.WhenRule grammar: New grammar rule that parses
when <expr> { <statements> }syntax.SemanticAnalyzer: Added
analyze(ASTWhen)to validate the condition is numeric and recursively analyze the body statements.Differential Revision: D96342217