54 lines
2.1 KiB
C++
54 lines
2.1 KiB
C++
// Copyright (C) 2019-2020 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++2a" }
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// { dg-do compile { target c++2a } }
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#include <concepts>
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static_assert( ! std::relation<bool, void, void> );
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static_assert( ! std::relation<bool(), void, void> );
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static_assert( ! std::relation<bool(*)(), void, void> );
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static_assert( ! std::relation<bool(&)(int, int), void, void> );
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static_assert( ! std::relation<bool(), int, int> );
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static_assert( ! std::relation<bool() const, int, int> );
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static_assert( std::relation<bool(*)(int, int), short, long> );
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static_assert( std::relation<bool(&)(const void*, const void*), char[2], int*> );
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static_assert( ! std::relation<bool& (const long*, short), long*, char> );
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struct A;
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static_assert( ! std::relation<int A::*, const A&, const A&> );
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static_assert( ! std::relation<void (A::*)(long&), const A*, long&> );
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static_assert( ! std::relation<void (A::*)(long&) const, A*, long&> );
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static_assert( std::relation<long (A::*)(A*) const, A*, A*> );
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struct F
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{
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void operator()(long, long) const;
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bool& operator()(int, const int&) const;
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};
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static_assert( ! std::relation<F, long, long> );
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static_assert( std::relation<F&, int, int> );
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static_assert( std::relation<const F&, const int, const int> );
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// [concept.equiv]
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static_assert( std::equivalence_relation<bool(*)(int, int), short, long> );
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static_assert( ! std::equivalence_relation<F, long, long> );
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static_assert( std::equivalence_relation<const F&, const int, const int> );
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