1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <chrono>
10
11// duration
12
13// template <class Rep2, class Period2>
14// duration(const duration<Rep2, Period2>& d);
15
16// exact conversions allowed for integral reps
17
18#include <chrono>
19#include <cassert>
20
21#include "test_macros.h"
22
23int main(int, char**)
24{
25 {
26 std::chrono::milliseconds ms(1);
27 std::chrono::microseconds us = ms;
28 assert(us.count() == 1000);
29 }
30#if TEST_STD_VER >= 11
31 {
32 constexpr std::chrono::milliseconds ms(1);
33 constexpr std::chrono::microseconds us = ms;
34 static_assert(us.count() == 1000, "");
35 }
36#endif
37
38 return 0;
39}
40

source code of libcxx/test/std/time/time.duration/time.duration.cons/convert_exact.pass.cpp