libstdc++/68995 qualify calls to __callable_functor

	PR libstdc++/68995
	* include/std/functional (_function_handler, function): Qualify
	__callable_functor.
	* testsuite/20_util/function/68995.cc: New.

From-SVN: r231880

libstdc++-v3/ChangeLog

 2015-12-21  Jonathan Wakely  <jwakely@redhat.com>
 
+	PR libstdc++/68995
+	* include/std/functional (_function_handler, function): Qualify
+	__callable_functor.
+	* testsuite/20_util/function/68995.cc: New.
+
 	PR libstdc++/68276
 	* include/std/functional (__invoke_impl, _Mem_fn::operator()): Qualify
 	std::forward.

libstdc++-v3/include/std/functional

@@ -1752,7 +1752,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
       static _Res
       _M_invoke(const _Any_data& __functor, _ArgTypes&&... __args)
       {
-	return __callable_functor(**_Base::_M_get_pointer(__functor))(
+	return std::__callable_functor(**_Base::_M_get_pointer(__functor))(
 	      std::forward<_ArgTypes>(__args)...);
       }
     };
@@ -1767,7 +1767,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
       static void
       _M_invoke(const _Any_data& __functor, _ArgTypes&&... __args)
       {
-	__callable_functor(**_Base::_M_get_pointer(__functor))(
+	std::__callable_functor(**_Base::_M_get_pointer(__functor))(
 	    std::forward<_ArgTypes>(__args)...);
       }
     };
@@ -1847,8 +1847,9 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
       typedef _Res _Signature_type(_ArgTypes...);
 
       template<typename _Functor>
-	using _Invoke = decltype(__callable_functor(std::declval<_Functor&>())
-				 (std::declval<_ArgTypes>()...) );
+	using _Invoke
+	= decltype(std::__callable_functor(std::declval<_Functor&>())
+		   (std::declval<_ArgTypes>()...) );
 
       // Used so the return type convertibility checks aren't done when
       // performing overload resolution for copy construction/assignment.

libstdc++-v3/testsuite/20_util/function/68995.cc

+// Copyright (C) 2015 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/>.
+
+// { dg-options "-std=gnu++11" }
+// { dg-do compile }
+
+#include <tr1/memory>
+#include <functional>
+#include <tr1/functional>
+
+std::tr1::shared_ptr<int> test() { return {}; }
+
+std::function<std::tr1::shared_ptr<int>()> func = test;