4684ddb6aa
- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
38 lines
1.3 KiB
C++
38 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <chrono>
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// time_point
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// template <class Clock, class Duration1, class Rep2, class Period2>
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// time_point<Clock, typename common_type<Duration1, duration<Rep2, Period2>>::type>
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// operator-(const time_point<Clock, Duration1>& lhs, const duration<Rep2, Period2>& rhs);
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#include <chrono>
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#include <cassert>
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int main()
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{
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typedef std::chrono::system_clock Clock;
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typedef std::chrono::milliseconds Duration1;
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typedef std::chrono::microseconds Duration2;
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{
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std::chrono::time_point<Clock, Duration1> t1(Duration1(3));
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std::chrono::time_point<Clock, Duration2> t2 = t1 - Duration2(5);
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assert(t2.time_since_epoch() == Duration2(2995));
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}
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#if _LIBCPP_STD_VER > 11
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{
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constexpr std::chrono::time_point<Clock, Duration1> t1(Duration1(3));
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constexpr std::chrono::time_point<Clock, Duration2> t2 = t1 - Duration2(5);
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static_assert(t2.time_since_epoch() == Duration2(2995), "");
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}
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#endif
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}
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