44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
// Copyright (C) 2019-2024 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-do compile { target c++20 } }
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#include <concepts>
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static_assert( ! std::invocable<int> );
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static_assert( std::invocable<int()> );
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static_assert( std::invocable<int(*)()> );
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static_assert( std::invocable<int(&)()> );
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static_assert( ! std::invocable<int(), int> );
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static_assert( ! std::invocable<int() const> );
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static_assert( std::invocable<int(const long*, short), long*, char> );
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struct A;
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static_assert( std::invocable<int A::*, const A&> );
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static_assert( ! std::invocable<void (A::*)(long&), const A*, long&> );
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static_assert( std::invocable<void (A::*)(long&) const, A*, long&> );
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struct F
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{
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void operator()() const;
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void operator()(int);
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};
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static_assert( std::invocable<F> );
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static_assert( std::invocable<F, int> );
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static_assert( std::invocable<const F&> );
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static_assert( ! std::invocable<const F&, int> );
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