1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <chrono> 11 12// duration 13 14// constexpr duration& operator++(); // constexpr in c++17 15 16#include <chrono> 17#include <cassert> 18 19#include "test_macros.h" 20 21#if TEST_STD_VER > 14 22constexpr bool test_constexpr() 23{ 24 std::chrono::hours h(3); 25 return (++h).count() == 4; 26} 27#endif 28 29int main() 30{ 31 { 32 std::chrono::hours h(3); 33 std::chrono::hours& href = ++h; 34 assert(&href == &h); 35 assert(h.count() == 4); 36 } 37 38#if TEST_STD_VER > 14 39 static_assert(test_constexpr(), ""); 40#endif 41} 42