1c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 2c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 3c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// The LLVM Compiler Infrastructure 4c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 8c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 9c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 10c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// <chrono> 11c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 12c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// duration 13c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 143df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow// constexpr duration operator--(int); // constexpr in C++17 15c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 16c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <chrono> 17c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <cassert> 18c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 193df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow#include "test_macros.h" 203df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow 213df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow#if TEST_STD_VER > 14 223df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clowconstexpr bool test_constexpr() 233df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow{ 243df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow std::chrono::hours h1(3); 253df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow std::chrono::hours h2 = h1--; 263df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow return h1.count() == 2 && h2.count() == 3; 273df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow} 283df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow#endif 293df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow 303df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow 31c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint main() 32c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 333df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow { 343df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow std::chrono::hours h1(3); 353df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow std::chrono::hours h2 = h1--; 363df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow assert(h1.count() == 2); 37c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(h2.count() == 3); 383df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow } 393df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow 403df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow#if TEST_STD_VER > 14 413df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow static_assert(test_constexpr(), ""); 423df90c94a3ed6da4c0fceaa3f65529c3b2034f90Marshall Clow#endif 43c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 44