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 
23 int 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