Everything is a closure

object/object.go

@@ -22,7 +22,8 @@ const (
 	BUILTIN_OBJ           = "BUILTIN"
 	ARRAY_OBJ             = "ARRAY"
 	HASH_OBJ              = "HASH"
-	COMPILED_FUNCTION_OBJ = "COMPILED_FUNCTION_OBJ "
+	COMPILED_FUNCTION_OBJ = "COMPILED_FUNCTION"
+	CLOSURE_OBJ           = "CLOSURE"
 )
 
 type Object interface {
@@ -235,3 +236,16 @@ func (cf *CompiledFunction) Type() ObjectType {
 func (cf *CompiledFunction) Inspect() string {
 	return fmt.Sprintf("CompiledFunction[%p]", cf)
 }
+
+type Closure struct {
+	Fn   *CompiledFunction
+	Free []Object
+}
+
+func (c *Closure) Type() ObjectType {
+	return CLOSURE_OBJ
+}
+
+func (c *Closure) Inspect() string {
+	return fmt.Sprintf("Closure[%p]", c)
+}