| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <chrono> |
| |
| // duration |
| |
| // constexpr duration& operator--(); // constexpr in C++17 |
| |
| #include <chrono> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| #if TEST_STD_VER > 14 |
| constexpr bool test_constexpr() |
| { |
| std::chrono::hours h(3); |
| return (--h).count() == 2; |
| } |
| #endif |
| |
| int main() |
| { |
| { |
| std::chrono::hours h(3); |
| std::chrono::hours& href = --h; |
| assert(&href == &h); |
| assert(h.count() == 2); |
| } |
| |
| #if TEST_STD_VER > 14 |
| static_assert(test_constexpr(), ""); |
| #endif |
| } |