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

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