Implement "move" equivalent of assignment operator for StrPair

tinyxml2.cpp

@@ -70,6 +70,29 @@ StrPair::~StrPair()
 }
 
 
+void StrPair::TransferTo( StrPair& other )
+{
+    if ( this == &other ) {
+        return;
+    }
+    // This in effect implements the assignment operator by "moving"
+    // ownership (as in auto_ptr).
+
+    TIXMLASSERT( other._flags == 0 );
+    TIXMLASSERT( other._start == 0 );
+    TIXMLASSERT( other._end == 0 );
+
+    other.Reset();
+
+    other._flags = _flags;
+    other._start = _start;
+    other._end = _end;
+
+    _flags = 0;
+    _start = 0;
+    _end = 0;
+}
+
 void StrPair::Reset()
 {
     if ( _flags & NEEDS_DELETE ) {
@@ -824,7 +847,7 @@ char* XMLNode::ParseDeep( char* p, StrPair* parentEnd )
         // We read the end tag. Return it to the parent.
         if ( ele && ele->ClosingType() == XMLElement::CLOSING ) {
             if ( parentEnd ) {
-                *parentEnd = ele->_value;
+                ele->_value.TransferTo( *parentEnd );
             }
 			node->_memPool->SetTracked();	// created and then immediately deleted.
             DeleteNode( node );