Introduce typed semantic analysis pipeline

internal/lang/ast.go

@@ -6,7 +6,6 @@ type Program struct {
 	Interfaces  []InterfaceDecl
 	Enums       []EnumDecl
 	Classes     []ClassDecl
-	Workers     []WorkerDecl
 	Functions   []FunctionDecl
 	Embeds      []EmbedDecl
 }
@@ -44,19 +43,6 @@ type ClassDecl struct {
 	Methods    []FunctionDecl
 }
 
-type WorkerDecl struct {
-	Name    string
-	Fields  []WorkerFieldDecl
-	Methods []FunctionDecl
-}
-
-type WorkerFieldDecl struct {
-	Mutable bool
-	Name    string
-	Type    string
-	Value   Expr
-}
-
 type FieldDecl struct {
 	Mutable   bool
 	Private   bool
@@ -148,12 +134,6 @@ type ThrowStmt struct {
 
 func (ThrowStmt) stmtNode() {}
 
-type GoStmt struct {
-	Value Expr
-}
-
-func (GoStmt) stmtNode() {}
-
 type DeferStmt struct {
 	Value Expr
 }
@@ -198,12 +178,6 @@ type TryCatchStmt struct {
 
 func (TryCatchStmt) stmtNode() {}
 
-type SelectStmt struct {
-	Cases []SelectCase
-}
-
-func (SelectStmt) stmtNode() {}
-
 type MatchStmt struct {
 	Value Expr
 	Cases []MatchCase
@@ -218,6 +192,7 @@ type MatchCase struct {
 }
 
 type MatchExpr struct {
+	Meta  ExprMeta
 	Value Expr
 	Cases []MatchExprCase
 }
@@ -230,46 +205,47 @@ type MatchExprCase struct {
 	Value                 Expr
 }
 
-type SelectCase struct {
-	Source Expr
-	Body   []Stmt
-}
-
 type IdentExpr struct {
+	Meta ExprMeta
 	Name string
 }
 
 func (IdentExpr) exprNode() {}
 
 type IntExpr struct {
+	Meta  ExprMeta
 	Value string
 }
 
 func (IntExpr) exprNode() {}
 
 type FloatExpr struct {
+	Meta  ExprMeta
 	Value string
 }
 
 func (FloatExpr) exprNode() {}
 
 type StringExpr struct {
+	Meta  ExprMeta
 	Value string
 }
 
 func (StringExpr) exprNode() {}
 
 type BoolExpr struct {
+	Meta  ExprMeta
 	Value bool
 }
 
 func (BoolExpr) exprNode() {}
 
-type NullExpr struct{}
+type NullExpr struct{ Meta ExprMeta }
 
 func (NullExpr) exprNode() {}
 
 type UnaryExpr struct {
+	Meta  ExprMeta
 	Op    string
 	Value Expr
 }
@@ -277,6 +253,7 @@ type UnaryExpr struct {
 func (UnaryExpr) exprNode() {}
 
 type BinaryExpr struct {
+	Meta  ExprMeta
 	Left  Expr
 	Op    string
 	Right Expr
@@ -285,6 +262,7 @@ type BinaryExpr struct {
 func (BinaryExpr) exprNode() {}
 
 type CallExpr struct {
+	Meta      ExprMeta
 	Callee    Expr
 	Args      []Expr
 	TypeArgs  []string
@@ -299,6 +277,7 @@ type NamedArg struct {
 func (CallExpr) exprNode() {}
 
 type SelectorExpr struct {
+	Meta     ExprMeta
 	Receiver Expr
 	Name     string
 }
@@ -306,21 +285,29 @@ type SelectorExpr struct {
 func (SelectorExpr) exprNode() {}
 
 type SafeSelectorExpr struct {
+	Meta     ExprMeta
 	Receiver Expr
 	Name     string
 }
 
 func (SafeSelectorExpr) exprNode() {}
 
-type NonNullExpr struct{ Value Expr }
+type NonNullExpr struct {
+	Meta  ExprMeta
+	Value Expr
+}
 
 func (NonNullExpr) exprNode() {}
 
-type TryExpr struct{ Value Expr }
+type TryExpr struct {
+	Meta  ExprMeta
+	Value Expr
+}
 
 func (TryExpr) exprNode() {}
 
 type IndexExpr struct {
+	Meta     ExprMeta
 	Receiver Expr
 	Index    Expr
 }
@@ -328,6 +315,7 @@ type IndexExpr struct {
 func (IndexExpr) exprNode() {}
 
 type EnumVariantExpr struct {
+	Meta                  ExprMeta
 	EnumName, VariantName string
 	Values                []Expr
 }
@@ -335,6 +323,7 @@ type EnumVariantExpr struct {
 func (EnumVariantExpr) exprNode() {}
 
 type LambdaExpr struct {
+	Meta       ExprMeta
 	Params     []Param
 	ImplicitIt bool
 	Body       []Stmt