stl_map.h (operator[](key_type&&)): Replace std::make_pair with value_type.

2012-08-03  Ollie Wild  <aaw@google.com>
	    Richard Smith  <richardsmith@google.com>

	* include/bits/stl_map.h (operator[](key_type&&)): Replace
	std::make_pair with value_type.
	* testsuite/23_containers/map/operators/2.cc: New test.

Co-Authored-By: Richard Smith <richardsmith@google.com>

From-SVN: r190128

libstdc++-v3/ChangeLog

+2012-08-03  Ollie Wild  <aaw@google.com>
+	    Richard Smith  <richardsmith@google.com>
+
+	* include/bits/stl_map.h (operator[](key_type&&)): Replace
+	std::make_pair with value_type.
+	* testsuite/23_containers/map/operators/2.cc: New test.
+
 2012-08-03  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
 	* include/std/memory: Include auto_ptr.h later.

libstdc++-v3/include/bits/stl_map.h

@@ -475,7 +475,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 	iterator __i = lower_bound(__k);
 	// __i->first is greater than or equivalent to __k.
 	if (__i == end() || key_comp()(__k, (*__i).first))
-          __i = insert(__i, std::make_pair(std::move(__k), mapped_type()));
+          __i = insert(__i, value_type(std::move(__k), mapped_type()));
 	return (*__i).second;
       }
 #endif

libstdc++-v3/testsuite/23_containers/map/operators/2.cc

+// Copyright (C) 2012
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// 23.4.4 template class map
+
+// This test verifies that the value type of a map need not be default
+// copyable.
+
+// { dg-do compile }
+// { dg-options "-std=gnu++11" }
+
+#include <map>
+
+struct Mapped {
+    Mapped();
+    explicit Mapped(const Mapped&);
+};
+
+Mapped & foo()
+{
+  std::map<int, Mapped> m;
+  return m[0];
+}