libcxx/test/std/utilities/function.objects/comparisons/equal_to.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
  10
  11 // <functional>
  12
  13 // equal_to
  14
  15 #include <functional>
  16 #include <type_traits>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20
  21 int main(int, char**)
  22 {
  23     typedef std::equal_to<int> F;
  24     const F f = F();
  25 #if TEST_STD_VER <= 17
  26     static_assert((std::is_same<int, F::first_argument_type>::value), "" );
  27     static_assert((std::is_same<int, F::second_argument_type>::value), "" );
  28     static_assert((std::is_same<bool, F::result_type>::value), "" );
  29 #endif
  30     assert(f(36, 36));
  31     assert(!f(36, 6));
  32 #if TEST_STD_VER > 11
  33     typedef std::equal_to<> F2;
  34     const F2 f2 = F2();
  35     assert(f2(36, 36));
  36     assert(!f2(36, 6));
  37     assert(f2(36, 36.0));
  38     assert(f2(36.0, 36L));
  39
  40     constexpr bool foo = std::equal_to<int> () (36, 36);
  41     static_assert ( foo, "" );
  42
  43     constexpr bool bar = std::equal_to<> () (36.0, 36);
  44     static_assert ( bar, "" );
  45 #endif
  46
  47   return 0;
  48 }