libstdc++-v3/testsuite/20_util/is_convertible/value.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // 2009-10-29  Paolo Carlini  <paolo.carlini@oracle.com>
   4 //
   5 // Copyright (C) 2009-2019 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 #include <type_traits>
  23 #include <testsuite_tr1.h>
  24
  25 void test01()
  26 {
  27   using std::is_convertible;
  28   using namespace __gnu_test;
  29
  30   // Positive tests.
  31   static_assert(test_relationship<is_convertible, int, int>(true), "");
  32   static_assert(test_relationship<is_convertible, int, const int>(true), "");
  33   static_assert(test_relationship<is_convertible,
  34                 volatile int, const int>(true), "");
  35   static_assert(test_relationship<is_convertible, int, float>(true), "");
  36   static_assert(test_relationship<is_convertible, double, float>(true), "");
  37   static_assert(test_relationship<is_convertible, float, int>(true), "");
  38   static_assert(test_relationship<is_convertible, int*, const int*>(true), "");
  39   static_assert(test_relationship<is_convertible, int*, void*>(true), "");
  40   static_assert(test_relationship<is_convertible, int[4], int*>(true), "");
  41   static_assert(test_relationship<is_convertible, float&, int>(true), "");
  42   static_assert(test_relationship<is_convertible, int, const int&>(true), "");
  43   static_assert(test_relationship<is_convertible, const int&, int>(true), "");
  44   static_assert(test_relationship<is_convertible, float, const int&>(true), "");
  45   static_assert(test_relationship<is_convertible, int(int),
  46                 int(*)(int)>(true), "");
  47   static_assert(test_relationship<is_convertible,
  48                 int(&)(int), int(*)(int)>(true), "");
  49   static_assert(test_relationship<is_convertible, EnumType, int>(true), "");
  50   static_assert(test_relationship<is_convertible, ClassType,
  51                 ClassType>(true), "");
  52   static_assert(test_relationship<is_convertible, DerivedType,
  53                 ClassType>(true), "");
  54   static_assert(test_relationship<is_convertible, DerivedType*,
  55                 ClassType*>(true), "");
  56   static_assert(test_relationship<is_convertible, DerivedType&,
  57                 ClassType&>(true), "");
  58
  59   static_assert(test_relationship<is_convertible, const int,
  60                 const int&>(true), "");
  61
  62   static_assert(test_relationship<is_convertible, void, void>(true), "");
  63   static_assert(test_relationship<is_convertible, const void, void>(true), "");
  64   static_assert(test_relationship<is_convertible, void,
  65                 volatile void>(true), "");
  66   static_assert(test_relationship<is_convertible, double&,
  67                 ExplicitClass>(true), "");
  68
  69   static_assert(test_relationship<is_convertible, int(int),
  70                 int(&)(int)>(true), "");
  71
  72   // Negative tests.
  73   static_assert(test_relationship<is_convertible, const int*, int*>(false), "");
  74   static_assert(test_relationship<is_convertible, int*, float*>(false), "");
  75   static_assert(test_relationship<is_convertible, const int[4],
  76                 int*>(false), "");
  77   static_assert(test_relationship<is_convertible, int[4], int[4]>(false), "");
  78   static_assert(test_relationship<is_convertible, const int&, int&>(false), "");
  79   static_assert(test_relationship<is_convertible, float&, int&>(false), "");
  80   static_assert(test_relationship<is_convertible, float,
  81                 volatile int&>(false), "");
  82   static_assert(test_relationship<is_convertible, int(int),
  83                 int(int)>(false), "");
  84   static_assert(test_relationship<is_convertible, int(int),
  85                 int(*)(void)>(false), "");
  86   static_assert(test_relationship<is_convertible, int(*)(int),
  87                 int(&)(int)>(false), "");
  88   static_assert(test_relationship<is_convertible, int, EnumType>(false), "");
  89   static_assert(test_relationship<is_convertible, int, ClassType>(false), "");
  90   static_assert(test_relationship<is_convertible, ClassType,
  91                 DerivedType>(false), "");
  92   static_assert(test_relationship<is_convertible, ClassType*,
  93                 DerivedType*>(false), "");
  94   static_assert(test_relationship<is_convertible, ClassType&,
  95                 DerivedType&>(false), "");
  96
  97   static_assert(test_relationship<is_convertible, void, int>(false), "");
  98   static_assert(test_relationship<is_convertible, void, float>(false), "");
  99   static_assert(test_relationship<is_convertible, void,
 100                 int(*)(int)>(false), "");
 101
 102   // C++0x
 103   static_assert(test_relationship<is_convertible, int, void>(false), "");
 104   static_assert(test_relationship<is_convertible, int[4], void>(false), "");
 105
 106   static_assert(test_relationship<is_convertible, int, int&>(false), "");
 107   static_assert(test_relationship<is_convertible, float,
 108                 volatile float&>(false), "");
 109   static_assert(test_relationship<is_convertible, const volatile int,
 110                 const volatile int&>(false), "");
 111   static_assert(test_relationship<is_convertible, volatile int,
 112                 volatile int&>(false), "");
 113   static_assert(test_relationship<is_convertible, int&,
 114                 ExplicitClass>(false), "");
 115   static_assert(test_relationship<is_convertible, void*,
 116                 ExplicitClass>(false), "");
 117 }