libcxx/test/std/depr/depr.lib.binders/depr.lib.binder.2nd/binder2nd.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 // template <class Fn>
  12 // class binder2nd
  13 //   : public unary_function<typename Fn::first_argument_type, typename Fn::result_type>
  14 // {
  15 // protected:
  16 //   Fn op;
  17 //   typename Fn::second_argument_type value;
  18 // public:
  19 //   binder2nd(const Fn& x, const typename Fn::second_argument_type& y);
  20 //
  21 //   typename Fn::result_type operator()(const typename Fn::first_argument_type& x) const;
  22 //   typename Fn::result_type operator()(typename Fn::first_argument_type& x) const;
  23 // };
  24
  25 // REQUIRES: c++03 || c++11 || c++14
  26 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
  27
  28 #include <functional>
  29 #include <type_traits>
  30 #include <cassert>
  31
  32 #include "test_macros.h"
  33 #include "../test_func.h"
  34
  35 class test
  36     : public std::binder2nd<test_func>
  37 {
  38     typedef std::binder2nd<test_func> base;
  39 public:
  40     test() : std::binder2nd<test_func>(test_func(3), 4.5) {}
  41
  42     void do_test()
  43     {
  44         static_assert((std::is_base_of<
  45                          std::unary_function<test_func::first_argument_type,
  46                                              test_func::result_type>,
  47                          test>::value), "");
  48         assert(op.id() == 3);
  49         assert(value == 4.5);
  50
  51         int i = 5;
  52         assert((*this)(i) == 22.5);
  53         assert((*this)(5) == 0.5);
  54     }
  55 };
  56
  57 int main(int, char**)
  58 {
  59     test t;
  60     t.do_test();
  61
  62   return 0;
  63 }