extract function lowering helper for compile

Author: mgomes

docs/architecture.md

@@ -91,6 +91,7 @@ Key files:
 - `vibes/parser_types.go` (type-expression parsing)
 - `vibes/ast.go`
 - `vibes/execution_compile.go` (AST lowering into compiled script functions/classes)
+- `vibes/execution_compile_functions.go` (function lowering helper for compile)
 - `vibes/execution_compile_classes.go` (class/property/method lowering helpers for compile)
 - `vibes/execution_compile_errors.go` (parse error aggregation for compile failures)
 

vibes/execution_compile.go

@@ -20,7 +20,7 @@ func (e *Engine) Compile(source string) (*Script, error) {
 			if _, exists := functions[s.Name]; exists {
 				return nil, fmt.Errorf("duplicate function %s", s.Name)
 			}
-			functions[s.Name] = &ScriptFunction{Name: s.Name, Params: s.Params, ReturnTy: s.ReturnTy, Body: s.Body, Pos: s.Pos(), Exported: s.Exported, Private: s.Private}
+			functions[s.Name] = compileFunctionDef(s)
 		case *ClassStmt:
 			if _, exists := classes[s.Name]; exists {
 				return nil, fmt.Errorf("duplicate class %s", s.Name)

vibes/execution_compile_classes.go

@@ -39,10 +39,10 @@ func compileClassDef(stmt *ClassStmt) *ClassDef {
 		}
 	}
 	for _, fn := range stmt.Methods {
-		classDef.Methods[fn.Name] = &ScriptFunction{Name: fn.Name, Params: fn.Params, ReturnTy: fn.ReturnTy, Body: fn.Body, Pos: fn.Pos(), Private: fn.Private}
+		classDef.Methods[fn.Name] = compileFunctionDef(fn)
 	}
 	for _, fn := range stmt.ClassMethods {
-		classDef.ClassMethods[fn.Name] = &ScriptFunction{Name: fn.Name, Params: fn.Params, ReturnTy: fn.ReturnTy, Body: fn.Body, Pos: fn.Pos(), Private: fn.Private}
+		classDef.ClassMethods[fn.Name] = compileFunctionDef(fn)
 	}
 	return classDef
 }

vibes/execution_compile_functions.go

@@ -0,0 +1,13 @@
+package vibes
+
+func compileFunctionDef(stmt *FunctionStmt) *ScriptFunction {
+	return &ScriptFunction{
+		Name:     stmt.Name,
+		Params:   stmt.Params,
+		ReturnTy: stmt.ReturnTy,
+		Body:     stmt.Body,
+		Pos:      stmt.Pos(),
+		Exported: stmt.Exported,
+		Private:  stmt.Private,
+	}
+}