31 lines
1.0 KiB
C++
31 lines
1.0 KiB
C++
// Copyright (C) 2016-2020 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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// 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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// 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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// { dg-options "-std=gnu++17" }
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// { dg-do compile }
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#include <utility>
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#if __cpp_lib_as_const != 201510
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# error "__cpp_lib_as_const != 201510"
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#endif
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int i;
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constexpr auto& ci = std::as_const(i);
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static_assert( &i == &ci );
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static_assert( std::is_same_v<decltype(std::as_const(i)), const int&> );
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