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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::forward_iterator_wrapper;
using __gnu_test::bidirectional_iterator_wrapper;
namespace ranges = std::ranges;
template<template<typename> typename wrapper>
void
test01()
{
{
int x[] = {1,2,3,4,5,6,7,8,9,10};
test_container<int, wrapper> cx(x);
auto range = ranges::partition(cx, [] (int a) { return a%2==0; });
VERIFY( range.begin().ptr == x+5 );
VERIFY( range.end().ptr == x+10 );
VERIFY( ranges::is_partitioned(cx, [] (int a) { return a%2==0; }) );
}
{
int x[] = {1,2,3,4,5,6,7,8};
test_range<int, wrapper> rx(x);
auto range = ranges::partition(rx,
[] (int a) { return a%2==0; },
[] (int a) { return a+1; });
VERIFY( range.begin().ptr == x+4 );
VERIFY( range.end().ptr == x+8 );
VERIFY( ranges::is_partitioned(rx, [] (int a) { return a%2==1; }) );
}
}
constexpr bool
test02()
{
int x[] = {1,2,3,4,5,6,7,8,9,10};
auto range = ranges::partition(x, x+9, [] (int a) { return a < 100; });
return (range.begin() == x+9 && range.end() == x+9);
}
int
main()
{
test01<forward_iterator_wrapper>();
test01<bidirectional_iterator_wrapper>();
static_assert(test02());
}