libcxx/test/std/language.support/support.runtime/ctime.pass.cpp

   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 }