From a6117dae16cf80e0998834fd4bd2174b60611816 Mon Sep 17 00:00:00 2001
From: Milo Yip <miloyip@gmail.com>
Date: Sun, 30 Nov 2014 19:11:40 +0800
Subject: [PATCH] Fix StringBuffer compilation error in VS2013

Add move constructor and prohibit copy constructor and assignment
operator.
---
 include/rapidjson/stringbuffer.h | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/include/rapidjson/stringbuffer.h b/include/rapidjson/stringbuffer.h
index b862572d..6ffc1e03 100644
--- a/include/rapidjson/stringbuffer.h
+++ b/include/rapidjson/stringbuffer.h
@@ -33,11 +33,21 @@ RAPIDJSON_NAMESPACE_BEGIN
     \note implements Stream concept
 */
 template <typename Encoding, typename Allocator = CrtAllocator>
-struct GenericStringBuffer {
+class GenericStringBuffer {
+public:
     typedef typename Encoding::Ch Ch;
 
     GenericStringBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
 
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    GenericStringBuffer(GenericStringBuffer&& rhs) : stack_(std::move(rhs.stack_)) {}
+    GenericStringBuffer& operator=(GenericStringBuffer&& rhs) {
+        if (&rhs != this)
+            stack_ = std::move(rhs.stack_);
+        return *this;
+    }
+#endif
+
     void Put(Ch c) { *stack_.template Push<Ch>() = c; }
     void Flush() {}
 
@@ -63,6 +73,11 @@ struct GenericStringBuffer {
 
     static const size_t kDefaultCapacity = 256;
     mutable internal::Stack<Allocator> stack_;
+
+private:
+    // Prohibit copy constructor & assignment operator.
+    GenericStringBuffer(const GenericStringBuffer&);
+    GenericStringBuffer& operator=(const GenericStringBuffer&);
 };
 
 //! String buffer with UTF8 encoding