text: //===----------------------------------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is dual licensed under the MIT and the University of Illinois Open
  // Source Licenses. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  
  // <functional>
  
  // equal_to
  
  #include <functional>
  #include <type_traits>
  #include <cassert>
  
  #include "test_macros.h"
  
  int main()
  {
      typedef std::equal_to<int> F;
      const F f = F();
      static_assert((std::is_same<int, F::first_argument_type>::value), "" );
      static_assert((std::is_same<int, F::second_argument_type>::value), "" );
      static_assert((std::is_same<bool, F::result_type>::value), "" );
      assert(f(36, 36));
      assert(!f(36, 6));
  #if TEST_STD_VER > 11
      typedef std::equal_to<> F2;
      const F2 f2 = F2();
      assert(f2(36, 36));
      assert(!f2(36, 6));
      assert(f2(36, 36.0));
      assert(f2(36.0, 36L));
  
      constexpr bool foo = std::equal_to<int> () (36, 36);
      static_assert ( foo, "" );
  
      constexpr bool bar = std::equal_to<> () (36.0, 36);
      static_assert ( bar, "" );
  #endif
  }
  