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

   1 // { dg-options "-std=gnu++11" }
   2 // { dg-require-cstdint "" }
   3
   4 // Copyright (C) 2008-2015 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 20.8.3 Class template duration [time.duration]
  22
  23 #include <chrono>
  24 #include <type_traits>
  25 #include <testsuite_hooks.h>
  26
  27 template<typename T>
  28 struct type_emulator
  29 {
  30   type_emulator() : i(T(0)) { }
  31   type_emulator(T j) : i(j) { }
  32   type_emulator(const type_emulator& e) : i(e.i) { }
  33
  34   type_emulator& operator*=(type_emulator a)
  35   { i *= a.i; return *this; }
  36
  37   type_emulator& operator+=(type_emulator a)
  38   { i += a.i; return *this; }
  39
  40   operator T () { return i; }
  41   T i;
  42 };
  43
  44 template<typename T>
  45 bool operator==(type_emulator<T> a, type_emulator<T> b)
  46 { return a.i == b.i; }
  47
  48 template<typename T>
  49 bool operator<(type_emulator<T> a, type_emulator<T> b)
  50 { return a.i < b.i; }
  51
  52 template<typename T>
  53 type_emulator<T> operator+(type_emulator<T> a, type_emulator<T> b)
  54 { return a += b; }
  55
  56 template<typename T>
  57 type_emulator<T> operator*(type_emulator<T> a, type_emulator<T> b)
  58 { return a *= b; }
  59
  60 namespace std
  61 {
  62   template<typename T, typename U>
  63   struct common_type<type_emulator<T>, U>
  64   { typedef typename common_type<T,U>::type type; };
  65
  66   template<typename T, typename U>
  67   struct common_type<U, type_emulator<T>>
  68   { typedef typename common_type<U,T>::type type; };
  69
  70   template<typename T, typename U>
  71   struct common_type<type_emulator<T>, type_emulator<U>>
  72   { typedef typename common_type<T,U>::type type; };
  73
  74   namespace chrono
  75   {
  76     template<typename T>
  77     struct treat_as_floating_point<type_emulator<T>>
  78     : is_floating_point<T>
  79     { };
  80   }
  81 }
  82
  83 typedef type_emulator<int> int_emulator;
  84 typedef type_emulator<double> dbl_emulator;
  85
  86 // 20.8.3.1 duration constructors [time.duration.cons]
  87 void
  88 test01()
  89 {
  90   bool test __attribute__((unused)) = true;
  91   using namespace std::chrono;
  92
  93   duration<int> d0(3);
  94   duration<int> d0_copy(d0);
  95   VERIFY(d0_copy.count() == d0.count());
  96
  97   duration<int, std::milli> d1(5);
  98   duration<int, std::micro> d1_copy(d1);
  99   VERIFY(d1.count() * 1000 == d1_copy.count());
 100
 101   duration<double, std::micro> d2(8.0);
 102   duration<double, std::milli> d2_copy(d2);
 103   VERIFY(d2.count() == d2_copy.count() * 1000.0);
 104
 105   duration<int_emulator, std::milli> d3(5);
 106   duration<int_emulator, std::micro> d3_copy(d3);
 107   VERIFY(d3.count() * 1000 == d3_copy.count());
 108
 109   duration<dbl_emulator, std::micro> d4(5.0);
 110   duration<dbl_emulator, std::milli> d4_copy(d4);
 111   VERIFY(d4.count() == d4_copy.count() * dbl_emulator(1000.0));
 112 }
 113
 114 int
 115 main()
 116 {
 117   test01();
 118   return 0;
 119 }