re PR libstdc++/57465 (Failed postcondition for std::function constructed with…

re PR libstdc++/57465 (Failed postcondition for std::function constructed with null function pointer)

	PR libstdc++/57465
	* include/std/functional
	(_Function_base::_Base_manager::_M_not_empty_function): Fix overload
	for pointers.
	* testsuite/20_util/function/cons/57465.cc: New.

From-SVN: r202974

libstdc++-v3/ChangeLog

+2013-08-07  Jonathan Wakely  <jwakely.gcc@gmail.com>
+
+	PR libstdc++/57465
+	* include/std/functional
+	(_Function_base::_Base_manager::_M_not_empty_function): Fix overload
+	for pointers.
+	* testsuite/20_util/function/cons/57465.cc: New.
+
 2013-09-26  Tim Shen  <timshen91@gmail.com>
 
 	* regex_error.h: Remove _S_error_last to follow the standard.

libstdc++-v3/include/std/functional

@@ -1932,7 +1932,7 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
 
 	template<typename _Tp>
 	  static bool
-	  _M_not_empty_function(const _Tp*& __fp)
+	  _M_not_empty_function(_Tp* const& __fp)
 	  { return __fp; }
 
 	template<typename _Class, typename _Tp>

libstdc++-v3/testsuite/20_util/function/cons/57465.cc

+// Copyright (C) 2013 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/>.
+
+// libstdc++/57465
+
+// { dg-options "-std=gnu++11" }
+
+#include <functional>
+#include <testsuite_hooks.h>
+
+int main()
+{
+  using F = void();
+  F* f = nullptr;
+  std::function<F> x(f);
+  VERIFY( !x );
+}