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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <utility>
// template <class T1, class T2> struct pair
// struct piecewise_construct_t { explicit piecewise_construct_t() = default; };
// constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t();
#include <utility>
#include <tuple>
#include <cassert>
#include "test_macros.h"
class A
{
int i_;
char c_;
public:
constexpr A(int i, char c) : i_(i), c_(c) {}
constexpr int get_i() const {return i_;}
constexpr char get_c() const {return c_;}
};
class B
{
double d_;
unsigned u1_;
unsigned u2_;
public:
constexpr explicit B(double d, unsigned u1, unsigned u2) : d_(d), u1_(u1), u2_(u2) {}
constexpr double get_d() const {return d_;}
constexpr unsigned get_u1() const {return u1_;}
constexpr unsigned get_u2() const {return u2_;}
};
TEST_CONSTEXPR_CXX20
bool test()
{
std::pair<A, B> p(std::piecewise_construct,
std::make_tuple(4, 'a'),
std::make_tuple(3.5, 6u, 2u));
assert(p.first.get_i() == 4);
assert(p.first.get_c() == 'a');
assert(p.second.get_d() == 3.5);
assert(p.second.get_u1() == 6u);
assert(p.second.get_u2() == 2u);
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER >= 20
static_assert(test());
#endif
return 0;
}
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