libcxx/test/std/time/time.duration/time.duration.cons/rep.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 // <chrono>
  10
  11 // duration
  12
  13 // template <class Rep2>
  14 //   explicit duration(const Rep2& r);
  15
  16 #include <chrono>
  17 #include <cassert>
  18 #include <ratio>
  19
  20 #include "test_macros.h"
  21 #include "../../rep.h"
  22
  23 #if TEST_STD_VER >= 11
  24 struct NotValueConvertible {
  25     operator int() const&& = delete;
  26     constexpr operator int() const& { return 1; }
  27 };
  28 #endif
  29
  30 template <class D, class R>
  31 TEST_CONSTEXPR_CXX14 void check(R r) {
  32     D d(r);
  33     assert(d.count() == r);
  34 }
  35
  36 TEST_CONSTEXPR_CXX14 bool test() {
  37     check<std::chrono::duration<int> >(5);
  38     check<std::chrono::duration<int, std::ratio<3, 2> > >(5);
  39     check<std::chrono::duration<Rep, std::ratio<3, 2> > >(Rep(3));
  40     check<std::chrono::duration<double, std::ratio<2, 3> > >(5.5);
  41
  42     // test for [time.duration.cons]/1
  43 #if TEST_STD_VER >= 11
  44     check<std::chrono::duration<int> >(NotValueConvertible());
  45 #endif
  46
  47     return true;
  48 }
  49
  50 int main(int, char**) {
  51     test();
  52 #if TEST_STD_VER > 11
  53     static_assert(test(), "");
  54 #endif
  55
  56     // Basic test for constexpr-friendliness in C++11
  57 #if TEST_STD_VER >= 11
  58     {
  59         constexpr std::chrono::duration<int> d(5);
  60         static_assert(d.count() == 5, "");
  61     }
  62 #endif
  63     return 0;
  64 }