re PR libstdc++/57336 (Cannot INVOKE a reference_wrapper around an abstract type)
PR libstdc++/57336 * include/std/functional (__invoke): Do not form function types with abstract return type. * testsuite/20_util/reference_wrapper/invoke-3.cc: New. From-SVN: r199136
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2013-05-21 Jonathan Wakely <jwakely.gcc@gmail.com>
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PR libstdc++/57336
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* include/std/functional (__invoke): Do not form function types with
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abstract return type.
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* testsuite/20_util/reference_wrapper/invoke-3.cc: New.
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2013-05-19 Jonathan Wakely <jwakely.gcc@gmail.com>
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* include/std/tuple (get): Implement N3670.
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@ -195,7 +195,7 @@ _GLIBCXX_HAS_NESTED_TYPE(result_type)
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(!is_member_pointer<_Functor>::value
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&& !is_function<_Functor>::value
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&& !is_function<typename remove_pointer<_Functor>::type>::value),
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typename result_of<_Functor(_Args&&...)>::type
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typename result_of<_Functor&(_Args&&...)>::type
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>::type
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__invoke(_Functor& __f, _Args&&... __args)
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{
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@ -0,0 +1,37 @@
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// { dg-options "-std=gnu++11" }
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// { dg-do compile }
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// Copyright (C) 2013 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// 20.8.3.4 reference_wrapper invocation [refwrap.invoke]
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#include <functional>
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struct ABC
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{
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virtual bool operator()() const = 0;
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};
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struct Concrete : ABC
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{
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virtual bool operator()() const { return true; }
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};
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Concrete c;
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ABC& abc = c;
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auto b = std::cref(abc)();
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