libstdc++-v3/testsuite/20_util/duration/cons/2.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2008-2018 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 20.8.3 Class template duration [time.duration]
  21
  22 #include <chrono>
  23 #include <type_traits>
  24 #include <testsuite_hooks.h>
  25
  26 template<typename T>
  27 struct type_emulator
  28 {
  29   type_emulator() : i(T(0)) { }
  30   type_emulator(T j) : i(j) { }
  31   type_emulator(const type_emulator& e) : i(e.i) { }
  32
  33   type_emulator& operator*=(type_emulator a)
  34   { i *= a.i; return *this; }
  35
  36   type_emulator& operator+=(type_emulator a)
  37   { i += a.i; return *this; }
  38
  39   operator T () { return i; }
  40   T i;
  41 };
  42
  43 template<typename T>
  44 bool operator==(type_emulator<T> a, type_emulator<T> b)
  45 { return a.i == b.i; }
  46
  47 template<typename T>
  48 bool operator<(type_emulator<T> a, type_emulator<T> b)
  49 { return a.i < b.i; }
  50
  51 template<typename T>
  52 type_emulator<T> operator+(type_emulator<T> a, type_emulator<T> b)
  53 { return a += b; }
  54
  55 template<typename T>
  56 type_emulator<T> operator*(type_emulator<T> a, type_emulator<T> b)
  57 { return a *= b; }
  58
  59 namespace std
  60 {
  61   template<typename T, typename U>
  62   struct common_type<type_emulator<T>, U>
  63   { typedef typename common_type<T,U>::type type; };
  64
  65   template<typename T, typename U>
  66   struct common_type<U, type_emulator<T>>
  67   { typedef typename common_type<U,T>::type type; };
  68
  69   template<typename T, typename U>
  70   struct common_type<type_emulator<T>, type_emulator<U>>
  71   { typedef typename common_type<T,U>::type type; };
  72
  73   namespace chrono
  74   {
  75     template<typename T>
  76     struct treat_as_floating_point<type_emulator<T>>
  77     : is_floating_point<T>
  78     { };
  79   }
  80 }
  81
  82 typedef type_emulator<int> int_emulator;
  83 typedef type_emulator<double> dbl_emulator;
  84
  85 // 20.8.3.1 duration constructors [time.duration.cons]
  86 void
  87 test01()
  88 {
  89   using namespace std::chrono;
  90
  91   duration<int> d0(3);
  92   duration<int> d0_copy(d0);
  93   VERIFY(d0_copy.count() == d0.count());
  94
  95   duration<int, std::milli> d1(5);
  96   duration<int, std::micro> d1_copy(d1);
  97   VERIFY(d1.count() * 1000 == d1_copy.count());
  98
  99   duration<double, std::micro> d2(8.0);
 100   duration<double, std::milli> d2_copy(d2);
 101   VERIFY(d2.count() == d2_copy.count() * 1000.0);
 102
 103   duration<int_emulator, std::milli> d3(5);
 104   duration<int_emulator, std::micro> d3_copy(d3);
 105   VERIFY(d3.count() * 1000 == d3_copy.count());
 106
 107   duration<dbl_emulator, std::micro> d4(5.0);
 108   duration<dbl_emulator, std::milli> d4_copy(d4);
 109   VERIFY(d4.count() == d4_copy.count() * dbl_emulator(1000.0));
 110 }
 111
 112 int
 113 main()
 114 {
 115   test01();
 116   return 0;
 117 }