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// Copyright (C) 2014-2017 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++17" }
#include <tuple>
#include <testsuite_hooks.h>
#if __cpp_lib_apply < 201603
# error "__cpp_lib_apply < 201603"
#endif
void
test01()
{
auto t = std::make_tuple(1, '2', 3.0);
std::apply( [&](int& i, char& c, double& d) {
VERIFY(&i == &std::get<int>(t));
VERIFY(&c == &std::get<char>(t));
VERIFY(&d == &std::get<double>(t));
}, t);
}
constexpr int func(int i, int j) { return i + j; }
void
test02()
{
constexpr auto t = std::make_tuple(1, 2);
constexpr int i = std::apply(func, t);
VERIFY( i == 3 );
}
struct F
{
int f(int i, int j) const { return i + j; }
};
void
test03()
{
auto t = std::make_tuple(F{}, 1, 2);
int r = std::apply(&F::f, t);
VERIFY( r == 3 );
}
int
main()
{
test01();
test02();
test03();
}
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