xref: /llvm-project/libcxx/test/std/language.support/support.runtime/ctime.pass.cpp (revision 204d56394845a36136e1d27cf93f300fb6795788)

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// test <ctime>

#include <ctime>
#include <type_traits>
#include "test_macros.h"

#ifndef NULL
#error NULL not defined
#endif

#ifndef CLOCKS_PER_SEC
#error CLOCKS_PER_SEC not defined
#endif

int main(int, char**)
{
    std::clock_t c = 0;
    std::size_t s = 0;
    std::time_t t = 0;
    std::tm tm = {};
    // std::timespec and std::timespec_get tested in ctime.timespec.compile.pass.cpp
    ((void)c); // Prevent unused warning
    ((void)s); // Prevent unused warning
    ((void)t); // Prevent unused warning
    ((void)tm); // Prevent unused warning
    static_assert((std::is_same<decltype(std::clock()), std::clock_t>::value), "");
    static_assert((std::is_same<decltype(std::difftime(t,t)), double>::value), "");
    static_assert((std::is_same<decltype(std::mktime(&tm)), std::time_t>::value), "");
    static_assert((std::is_same<decltype(std::time(&t)), std::time_t>::value), "");
    static_assert((std::is_same<decltype(std::asctime(&tm)), char*>::value), "");
    static_assert((std::is_same<decltype(std::ctime(&t)), char*>::value), "");
    static_assert((std::is_same<decltype(std::gmtime(&t)), std::tm*>::value), "");
    static_assert((std::is_same<decltype(std::localtime(&t)), std::tm*>::value), "");
    char* c1 = 0;
    const char* c2 = 0;
    ((void)c1); // Prevent unused warning
    ((void)c2); // Prevent unused warning
    static_assert((std::is_same<decltype(std::strftime(c1,s,c2,&tm)), std::size_t>::value), "");

  return 0;
}