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48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <chrono>
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// time_point
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// time_point& operator-=(const duration& d);
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// constexpr in c++17
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#include <chrono>
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#include <cassert>
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#include "test_macros.h"
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#if TEST_STD_VER > 14
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constexpr bool constexpr_test()
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{
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typedef std::chrono::system_clock Clock;
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typedef std::chrono::milliseconds Duration;
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std::chrono::time_point<Clock, Duration> t(Duration(5));
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t -= Duration(4);
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return t.time_since_epoch() == Duration(1);
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}
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#endif
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int main(int, char**)
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{
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{
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typedef std::chrono::system_clock Clock;
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typedef std::chrono::milliseconds Duration;
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std::chrono::time_point<Clock, Duration> t(Duration(3));
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t -= Duration(2);
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assert(t.time_since_epoch() == Duration(1));
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}
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#if TEST_STD_VER > 14
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static_assert(constexpr_test(), "");
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#endif
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return 0;
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}
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