error handling

1 files changed, 8 insertions, 0 deletions

diff --git a/object/object.go b/object/object.go
index fbecf88..20deb0c 100644
--- a/object/object.go
+++ b/object/object.go
@@ -9,6 +9,7 @@ const (
 	BOOLEAN_OBJ      = "BOOLEAN"
 	NULL_OBJ         = "NULL"
 	RETURN_VALUE_OBJ = "RETURN_VALUE"
+  ERROR_OBJ        = "ERROR"
 )
 
 type Object interface {
@@ -30,6 +31,10 @@ type ReturnValue struct {
 	Value Object
 }
 
+type Error struct {
+  Message string
+}
+
 func (i *Integer) Type() ObjectType {
 	return INTEGER_OBJ
 }
@@ -61,3 +66,6 @@ func (rv *ReturnValue) Type() ObjectType {
 func (rv *ReturnValue) Inspect() string {
 	return rv.Value.Inspect()
 }
+
+func (e *Error) Type() ObjectType { return ERROR_OBJ }
+func (e *Error) Inspect() string { return "ERROR:" + e.Message }