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// test <ctime>
10
11#include <ctime>
12#include <type_traits>
13#include "test_macros.h"
14
15#ifndef NULL
16#error NULL not defined
17#endif
18
19#ifndef CLOCKS_PER_SEC
20#error CLOCKS_PER_SEC not defined
21#endif
22
23int main(int, char**)
24{
25 std::clock_t c = 0;
26 std::size_t s = 0;
27 std::time_t t = 0;
28 std::tm tm = {};
29 // std::timespec and std::timespec_get tested in ctime.timespec.compile.pass.cpp
30 ((void)c); // Prevent unused warning
31 ((void)s); // Prevent unused warning
32 ((void)t); // Prevent unused warning
33 ((void)tm); // Prevent unused warning
34 static_assert((std::is_same<decltype(std::clock()), std::clock_t>::value), "");
35 static_assert((std::is_same<decltype(std::difftime(t,t)), double>::value), "");
36 static_assert((std::is_same<decltype(std::mktime(&tm)), std::time_t>::value), "");
37 static_assert((std::is_same<decltype(std::time(&t)), std::time_t>::value), "");
38 static_assert((std::is_same<decltype(std::asctime(&tm)), char*>::value), "");
39 static_assert((std::is_same<decltype(std::ctime(&t)), char*>::value), "");
40 static_assert((std::is_same<decltype(std::gmtime(&t)), std::tm*>::value), "");
41 static_assert((std::is_same<decltype(std::localtime(&t)), std::tm*>::value), "");
42 char* c1 = 0;
43 const char* c2 = 0;
44 ((void)c1); // Prevent unused warning
45 ((void)c2); // Prevent unused warning
46 static_assert((std::is_same<decltype(std::strftime(c1,s,c2,&tm)), std::size_t>::value), "");
47
48 return 0;
49}
50

source code of libcxx/test/std/language.support/support.runtime/ctime.pass.cpp