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// Copyright (C) 2019-2023 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++2a" }
// { dg-do run { target c++2a } }
#include <functional>
#include <testsuite_hooks.h>
// C++20 [range.cmp]
using F = std::ranges::not_equal_to;
static_assert( std::is_default_constructible_v<F> );
static_assert( std::is_copy_constructible_v<F> );
static_assert( std::is_move_constructible_v<F> );
static_assert( std::is_copy_assignable_v<F> );
static_assert( std::is_move_assignable_v<F> );
static_assert( ! std::is_invocable_v<F> );
static_assert( ! std::is_invocable_v<F, int&> );
static_assert( ! std::is_invocable_v<F, int, void> );
static_assert( ! std::is_invocable_v<F, int, void*> );
static_assert( std::is_nothrow_invocable_r_v<bool, F&, int&, int> );
static_assert( std::is_nothrow_invocable_r_v<bool, F, const long&, char> );
static_assert( std::is_nothrow_invocable_r_v<bool, const F&, short, int&> );
static_assert( std::is_nothrow_invocable_r_v<bool, const F, const char, char> );
using T = F::is_transparent; // required typedef
static_assert( ! std::ranges::not_equal_to{}(99, 99.0) );
static_assert( std::ranges::not_equal_to{}(99, 99.01) );
static_assert( std::ranges::not_equal_to{}(99, 140L) );
void
test01()
{
F f;
int a[2]{};
VERIFY( ! f(&a, (void*)&a[0]) );
VERIFY( f(&a, (void*)&a[1]) );
VERIFY( ! f(&a + 1, (void*)(a + 2)) );
}
struct X { };
int operator==(X, X) noexcept { return 2; }
int operator!=(X, X) { return 0; }
static_assert( std::is_nothrow_invocable_r_v<bool, F&, X, X> );
void
test02()
{
X x;
F f;
VERIFY( ! f(x, x) );
}
int
main()
{
test01();
test02();
}
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