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 | // constexpr duration& operator++(); // constexpr in C++17 |
14 | |
15 | #include <chrono> |
16 | #include <cassert> |
17 | |
18 | #include "test_macros.h" |
19 | |
20 | #if TEST_STD_VER > 14 |
21 | constexpr bool test_constexpr() |
22 | { |
23 | std::chrono::hours h(3); |
24 | return (++h).count() == 4; |
25 | } |
26 | #endif |
27 | |
28 | int main(int, char**) |
29 | { |
30 | { |
31 | std::chrono::hours h(3); |
32 | std::chrono::hours& href = ++h; |
33 | assert(&href == &h); |
34 | assert(h.count() == 4); |
35 | } |
36 | |
37 | #if TEST_STD_VER > 14 |
38 | static_assert(test_constexpr(), "" ); |
39 | #endif |
40 | |
41 | return 0; |
42 | } |
43 | |