From 0d7130ee48bb97951c3658cfce3ce05aad6935a7 Mon Sep 17 00:00:00 2001
From: john <john@johng.cn>
Date: Thu, 25 Oct 2018 12:10:05 +0800
Subject: [PATCH] =?UTF-8?q?gvar.Set=E6=96=B9=E6=B3=95=E8=BF=94=E5=9B=9E?=
 =?UTF-8?q?=E6=97=A7=E7=9A=84=E5=8F=98=E9=87=8F=E5=80=BC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 g/container/gvar/gvar.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/g/container/gvar/gvar.go b/g/container/gvar/gvar.go
index 79c5810d5..8c92ebba7 100644
--- a/g/container/gvar/gvar.go
+++ b/g/container/gvar/gvar.go
@@ -30,12 +30,14 @@ func New(value interface{}, safe...bool) *Var {
     return v
 }
 
-func (v *Var) Set(value interface{}) {
+func (v *Var) Set(value interface{}) (old interface{}) {
     if v.safe {
-        v.value.(*gtype.Interface).Set(value)
+        old = v.value.(*gtype.Interface).Set(value)
     } else {
+        old = v.value
         v.value = value
     }
+    return
 }
 
 func (v *Var) Val() interface{} {