libcxx/test/std/utilities/function.objects/negators/unary_negate.depr_in_cxx17.verify.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 //  deprecated in C++17
  13
  14 // UNSUPPORTED: c++03, c++11, c++14
  15 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS
  16
  17 #include <functional>
  18
  19 struct Predicate {
  20     typedef int argument_type;
  21     bool operator()(argument_type) const { return true; }
  22 };
  23
  24 void test() {
  25     std::unary_negate<Predicate> f((Predicate())); // expected-warning {{'unary_negate<Predicate>' is deprecated}}
  26     (void)f;
  27 }