libstdc++-v3/testsuite/20_util/function_objects/comparisons_void.cc

   1 // { dg-do compile { target c++14 } }
   2
   3 // Copyright (C) 2013-2018 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 // 20.3.3 Comparisons
  21
  22 #include <functional>
  23
  24 struct R { };
  25
  26 struct L
  27 {
  28   L operator+(const R&) const { return *this; }
  29   L operator-(const R&) const { return *this; }
  30   L operator*(const R&) const { return *this; }
  31   L operator/(const R&) const { return *this; }
  32   L operator%(const R&) const { return *this; }
  33   L operator-() const { return *this; }
  34
  35   bool operator==(const R&) const { return true; }
  36   bool operator!=(const R&) const { return false; }
  37   bool operator<(const R&) const { return false; }
  38   bool operator<=(const R&) const { return true; }
  39   bool operator>(const R&) const { return false; }
  40   bool operator>=(const R&) const { return true; }
  41
  42   bool operator&&(const R&) const { return true; }
  43   bool operator||(const R&) const { return true; }
  44   bool operator!() const { return false; }
  45
  46   int operator&(const R&) const { return 1; }
  47   int operator|(const R&) const { return 1; }
  48   int operator^(const R&) const { return 0; }
  49   int operator~() const { return 0; }
  50 };
  51
  52 L l;
  53 R r;
  54
  55 // test unary function objects
  56 template<typename F, typename Check = typename F::is_transparent>
  57 bool
  58 test1(F f)
  59 {
  60   f(l);
  61   return true;
  62 }
  63
  64 // test binary function objects
  65 template<typename F, typename Check = typename F::is_transparent>
  66 bool
  67 test2(F f)
  68 {
  69   f(l, r);
  70   return true;
  71 }
  72
  73 auto plus       = test2( std::plus<>() );
  74 auto minus      = test2( std::minus<>() );
  75 auto multiplies = test2( std::multiplies<>() );
  76 auto divides    = test2( std::divides<>() );
  77 auto modulus    = test2( std::modulus<>() );
  78 auto negate     = test1( std::negate<>() );
  79
  80 auto equal_to       = test2( std::equal_to<>() );
  81 auto not_equal_to   = test2( std::not_equal_to<>() );
  82 auto greater        = test2( std::greater<>() );
  83 auto less           = test2( std::less<>() );
  84 auto greater_equal  = test2( std::greater_equal<>() );
  85 auto less_equal     = test2( std::less_equal<>() );
  86
  87 auto logical_and    = test2( std::logical_and<>() );
  88 auto logical_or     = test2( std::logical_or<>() );
  89 auto logical_not    = test1( std::logical_not<>() );
  90
  91 auto bit_and        = test2( std::bit_and<>() );
  92 auto bit_or         = test2( std::bit_or<>() );
  93 auto bit_xor        = test2( std::bit_xor<>() );
  94 auto bit_not        = test1( std::bit_not<>() );