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 | // static constexpr duration zero(); // noexcept after C++17 |
14 | |
15 | #include <chrono> |
16 | #include <cassert> |
17 | |
18 | #include "test_macros.h" |
19 | #include "../../rep.h" |
20 | |
21 | template <class D> |
22 | void test() |
23 | { |
24 | LIBCPP_ASSERT_NOEXCEPT(std::chrono::duration_values<typename D::rep>::zero()); |
25 | #if TEST_STD_VER > 17 |
26 | ASSERT_NOEXCEPT( std::chrono::duration_values<typename D::rep>::zero()); |
27 | #endif |
28 | { |
29 | typedef typename D::rep DRep; |
30 | DRep zero_rep = std::chrono::duration_values<DRep>::zero(); |
31 | assert(D::zero().count() == zero_rep); |
32 | } |
33 | #if TEST_STD_VER >= 11 |
34 | { |
35 | typedef typename D::rep DRep; |
36 | constexpr DRep zero_rep = std::chrono::duration_values<DRep>::zero(); |
37 | static_assert(D::zero().count() == zero_rep, "" ); |
38 | } |
39 | #endif |
40 | } |
41 | |
42 | int main(int, char**) |
43 | { |
44 | test<std::chrono::duration<int> >(); |
45 | test<std::chrono::duration<Rep> >(); |
46 | |
47 | return 0; |
48 | } |
49 | |