const_pair.pass.cpp
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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
//
//===----------------------------------------------------------------------===//
// <tuple>
// template <class... Types> class tuple;
// template <class U1, class U2> tuple(const pair<U1, U2>& u);
// UNSUPPORTED: c++03
#include <tuple>
#include <utility>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
{
typedef std::pair<long, char> T0;
typedef std::tuple<long long, short> T1;
T0 t0(2, 'a');
T1 t1 = t0;
assert(std::get<0>(t1) == 2);
assert(std::get<1>(t1) == short('a'));
}
#if TEST_STD_VER > 11
{
typedef std::pair<long, char> P0;
typedef std::tuple<long long, short> T1;
constexpr P0 p0(2, 'a');
constexpr T1 t1 = p0;
static_assert(std::get<0>(t1) == std::get<0>(p0), "");
static_assert(std::get<1>(t1) == std::get<1>(p0), "");
static_assert(std::get<0>(t1) == 2, "");
static_assert(std::get<1>(t1) == short('a'), "");
}
#endif
return 0;
}