cxx/test/utilities/utility/pairs/pairs.pair/default.pass.cpp

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C++

//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <utility>
// template <class T1, class T2> struct pair
// constexpr pair();
#include <utility>
#include <cassert>
int main()
{
{
typedef std::pair<float, short*> P;
P p;
assert(p.first == 0.0f);
assert(p.second == nullptr);
}
#if _LIBCPP_STD_VER > 11
{
typedef std::pair<float, short*> P;
constexpr P p;
static_assert(p.first == 0.0f, "");
static_assert(p.second == nullptr, "");
}
#endif
}