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// Copyright (C) 2019-2021 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 <iterator>
#include <testsuite_hooks.h>
void
test01()
{
using S = std::move_sentinel<const int*>;
using M = std::move_iterator<int*>;
static_assert( std::is_default_constructible_v<S> );
static_assert( std::is_copy_constructible_v<S> );
static_assert( std::is_copy_assignable_v<S> );
static_assert( std::is_constructible_v<S, std::move_sentinel<int*>> );
static_assert( std::is_assignable_v<S, std::move_sentinel<int*>> );
constexpr S s;
static_assert( s.base() == nullptr );
constexpr M m;
static_assert( m == s );
static_assert( s == m );
static_assert( !(m != s) );
static_assert( !(s != m) );
int i = 0;
M m2(&i);
VERIFY( m2 != s );
VERIFY( s != m2 );
VERIFY( !(m2 == s) );
VERIFY( !(s == m2) );
}
void
test02()
{
struct sentinel { int limit; };
struct iterator
{
using iterator_category = std::input_iterator_tag;
using value_type = int;
using difference_type = std::ptrdiff_t;
using reference = const int&;
const int& operator*() const { return counter; }
iterator& operator++() { ++counter; return *this; }
iterator operator++(int) { auto i = *this; ++counter; return i; }
bool operator==(sentinel s) const { return counter == s.limit; }
int counter = 0;
};
static_assert( std::sentinel_for<sentinel, iterator> );
iterator i;
sentinel s{5};
int count = 0;
for (auto m = std::make_move_iterator(i); m != std::move_sentinel{s}; ++m)
++count;
VERIFY( count == 5 );
}
int
main()
{
test01();
test02();
}