From f8c8f8a6cb9629296c3188e7b6a63f13decbcda0 Mon Sep 17 00:00:00 2001
From: xiebaiyuan <xiebaiyuan@139.com>
Date: Mon, 15 Oct 2018 22:58:13 +0800
Subject: [PATCH] use larger buffer to avoid of big string

---
 src/common/variant.h | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/common/variant.h b/src/common/variant.h
index 8ec9ccb7a9..ca2fcc0907 100644
--- a/src/common/variant.h
+++ b/src/common/variant.h
@@ -79,13 +79,13 @@ struct Variant {
 
   template <typename T, typename... Args>
   void Set(Args &&... args) {
-    helper::Destroy(type_id, &data.data);
-    new (&data.data) T(std::forward<Args>(args)...);
+    helper::Destroy(type_id, data.data);
+    new (data.data) T(std::forward<Args>(args)...);
     type_id = typeid(T).hash_code();
   }
 
   void SetString(std::string &string) {
-    //    helper::Destroy(type_id, &data);
+    helper::Destroy(type_id, data.data);
     type_id = typeid(std::string).hash_code();
     strcpy(data.data, string.c_str());
   }
@@ -109,7 +109,7 @@ struct Variant {
           "stl lib with string copy)");
       exit(0);
     } else if (type_id == typeid(T).hash_code()) {
-      return *const_cast<T *>(reinterpret_cast<const T *>(&data));
+      return *const_cast<T *>(reinterpret_cast<const T *>(data.data));
     } else {
       PADDLE_MOBILE_THROW_EXCEPTION(" bad cast in variant");
       exit(0);
@@ -122,7 +122,8 @@ struct Variant {
   static inline size_t invalid_type() { return typeid(void).hash_code(); }
   typedef VariantHelper<Ts...> helper;
   size_t type_id;
-  RawData<helper::size> data;
+  // todo use an anto size to suite this.
+  RawData<64> data;
 };
 
 template <typename T>
-- 
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