add pkg parser

pkg_parser/ast.mbt

@@ -0,0 +1,77 @@
+///|
+pub(all) enum Ast {
+  Null(Location)
+  False(Location)
+  True(Location)
+  Str(str~ : String, loc~ : Location)
+  Float(float~ : String, loc~ : Location)
+  Arr(content~ : Array[Ast], loc~ : Location)
+  Obj(map~ : Map[String, Ast], loc~ : Location)
+} derive(Debug, Eq)
+
+///|
+pub fn Ast::loc(self : Self) -> Location {
+  match self {
+    Null(loc) => loc
+    False(loc) => loc
+    True(loc) => loc
+    Str(loc~, ..) => loc
+    Float(loc~, ..) => loc
+    Arr(loc~, ..) => loc
+    Obj(loc~, ..) => loc
+  }
+}
+
+///|
+pub fn Ast::as_bool(self : Self) -> Bool? {
+  match self {
+    True(_) => Some(true)
+    False(_) => Some(false)
+    _ => None
+  }
+}
+
+///|
+pub fn Ast::as_string(self : Self) -> String? {
+  match self {
+    Str(str~, ..) => Some(str)
+    _ => None
+  }
+}
+
+///|
+pub fn Ast::as_number(self : Self) -> String? {
+  match self {
+    Float(float~, ..) => Some(float)
+    _ => None
+  }
+}
+
+///|
+pub fn Ast::as_array(self : Self) -> Array[Ast]? {
+  match self {
+    Arr(content~, ..) => Some(content)
+    _ => None
+  }
+}
+
+///|
+pub fn Ast::as_object(self : Self) -> Map[String, Ast]? {
+  match self {
+    Obj(map~, ..) => Some(map)
+    _ => None
+  }
+}
+
+///|
+pub impl ToJson for Ast with to_json(self) {
+  match self {
+    Null(loc) => { "type": "Null", "loc": loc }
+    False(loc) => { "type": "False", "loc": loc }
+    True(loc) => { "type": "True", "loc": loc }
+    Str(str~, loc~) => { "type": "Str", "str": str, "loc": loc }
+    Float(float~, loc~) => { "type": "Float", "float": float, "loc": loc }
+    Arr(content~, loc~) => { "type": "Arr", "content": content, "loc": loc }
+    Obj(map~, loc~) => { "type": "Obj", "map": map, "loc": loc }
+  }
+}

pkg_parser/imports.mbt

@@ -0,0 +1,5 @@
+///|
+using @basic {type Location, type Position, type Report}
+
+///|
+using @tokens {type Token, type TokenKind, type Triple, type Triples}

pkg_parser/moon.pkg

@@ -0,0 +1,11 @@
+import {
+  "moonbitlang/parser/basic",
+  "moonbitlang/parser/tokens",
+  "moonbitlang/parser/lexer",
+  "moonbitlang/x/fs",
+}
+
+import {
+  "moonbitlang/core/test",
+  "moonbitlang/core/json",
+} for "test"