libcxx/test/std/time/time.duration/time.duration.cons/convert_int_to_float.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, class Period2>
  14 //   duration(const duration<Rep2, Period2>& d);
  15
  16 //  conversions from integral to floating point durations allowed
  17
  18 #include <chrono>
  19 #include <cassert>
  20 #include <ratio>
  21
  22 #include "test_macros.h"
  23
  24 int main(int, char**)
  25 {
  26     {
  27     std::chrono::duration<int> i(3);
  28     std::chrono::duration<double, std::milli> d = i;
  29     assert(d.count() == 3000);
  30     }
  31 #if TEST_STD_VER >= 11
  32     {
  33     constexpr std::chrono::duration<int> i(3);
  34     constexpr std::chrono::duration<double, std::milli> d = i;
  35     static_assert(d.count() == 3000, "");
  36     }
  37 #endif
  38
  39   return 0;
  40 }