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// Copyright (C) 2020-2022 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 <algorithm>
#include <testsuite_hooks.h>
#include <testsuite_iterators.h>
using __gnu_test::test_container;
using __gnu_test::test_range;
using __gnu_test::input_iterator_wrapper;
using __gnu_test::forward_iterator_wrapper;
namespace ranges = std::ranges;
struct X { int i; };
void
test01()
{
X x[] = { {2}, {2}, {6}, {8}, {10}, {11} };
int y[] = { 2, 7, 8, 8, 9 };
VERIFY( ranges::adjacent_find(x, x+6, {}, &X::i) == x+0 );
VERIFY( ranges::adjacent_find(x+1, x+6, {}, &X::i) == x+6 );
VERIFY( ranges::adjacent_find(y) == y+2 );
VERIFY( ranges::adjacent_find(y, y+4) == y+2 );
test_container<X, forward_iterator_wrapper> c(x);
VERIFY( ranges::adjacent_find(c, {}, &X::i) == ranges::begin(c) );
test_range<int, forward_iterator_wrapper> r(y);
auto res = ranges::adjacent_find(r);
VERIFY( *res == 8 && *++res == 8 );
}
void
test02()
{
static constexpr X x[] = { {2}, {2}, {6}, {8}, {10}, {11} };
static constexpr X y[] = { {2}, {6}, {8}, {10}, {11} };
static_assert(ranges::adjacent_find(x, {}, &X::i) == x+0);
static_assert(ranges::adjacent_find(y, {}, &X::i) == y+5);
}
int
main()
{
test01();
test02();
}
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