1 files changed, 10 insertions, 0 deletions
diff --git a/object/object.go b/object/object.go
index 731be0b..24de9be 100644
--- a/object/object.go
+++ b/object/object.go
@@ -17,6 +17,7 @@ const (
 	FUNCTION_OBJ     = "FUNCTION"
 	STRING_OBJ       = "STRING"
 	ERROR_OBJ        = "ERROR"
+	BUILTIN_OBJ      = "BUILTIN"
 )
 
 type Object interface {
@@ -52,6 +53,12 @@ type String struct {
 	Value string
 }
 
+type BuiltinFunction func(args ...Object) Object
+
+type Builtin struct {
+	Fn BuiltinFunction
+}
+
 func (i *Integer) Type() ObjectType {
 	return INTEGER_OBJ
 }
@@ -112,3 +119,6 @@ func (e *Error) Inspect() string  { return "ERROR:" + e.Message }
 
 func (s *String) Type() ObjectType { return STRING_OBJ }
 func (s *String) Inspect() string  { return s.Value }
+
+func (b *Builtin) Type() ObjectType { return BUILTIN_OBJ }
+func (b *Builtin) Inspect() string  { return "builtin function" }