libcxx/test/std/utilities/function.objects/negators/unary_negate.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 // <functional>
  10
  11 // unary_negate
  12
  13 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS
  14 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS
  15 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
  16
  17 #include <functional>
  18 #include <type_traits>
  19 #include <cassert>
  20
  21 #include "test_macros.h"
  22
  23 int main(int, char**)
  24 {
  25     typedef std::unary_negate<std::logical_not<int> > F;
  26     const F f = F(std::logical_not<int>());
  27     static_assert((std::is_same<F::argument_type, int>::value), "" );
  28     static_assert((std::is_same<F::result_type, bool>::value), "" );
  29     assert(f(36));
  30     assert(!f(0));
  31
  32   return 0;
  33 }