Marshall Clow 832b304076 Implement n3469 - constexpr for chrono
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@187517 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-31 19:32:19 +00:00

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1.1 KiB
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.
//
//===----------------------------------------------------------------------===//
// <chrono>
// time_point
// explicit time_point(const duration& d);
#include <chrono>
#include <cassert>
int main()
{
typedef std::chrono::system_clock Clock;
typedef std::chrono::milliseconds Duration;
{
std::chrono::time_point<Clock, Duration> t(Duration(3));
assert(t.time_since_epoch() == Duration(3));
}
{
std::chrono::time_point<Clock, Duration> t(std::chrono::seconds(3));
assert(t.time_since_epoch() == Duration(3000));
}
#if _LIBCPP_STD_VER > 11
{
constexpr std::chrono::time_point<Clock, Duration> t(Duration(3));
static_assert(t.time_since_epoch() == Duration(3), "");
}
{
constexpr std::chrono::time_point<Clock, Duration> t(std::chrono::seconds(3));
static_assert(t.time_since_epoch() == Duration(3000), "");
}
#endif
}