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// Copyright (C) 2016-2018 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>
#ifndef __cpp_lib_make_from_tuple
# error "Feature-test macro for make_from_tuple missing."
#elif __cpp_lib_make_from_tuple < 201606
# error "Feature-test macro for make_from_tuple has the wrong value."
#endif
template <class T, class U, class V>
struct ThreeParam
{
T t;
U u;
V v;
ThreeParam(const T& t, const U& u, const V& v)
: t(t),
u(u),
v(v) {}
};
void
test01()
{
auto x = std::make_tuple(1024, 'x', 2048);
ThreeParam<int, char, int> y
= std::make_from_tuple<ThreeParam<int, char, int>>(x);
VERIFY(y.t == 1024 && y.u == 'x' && y.v == 2048);
auto x2 = std::make_tuple(4096, 'z');
std::pair<int, char> z = std::make_from_tuple<std::pair<int, char>>(x2);
VERIFY(z.first == 4096 && z.second == 'z');
auto x3 = std::make_tuple(8192);
int i = std::make_from_tuple<int>(x3);
VERIFY(i == 8192);
}
int
main()
{
test01();
}
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