libcxx/test/std/containers/Emplaceable.h

   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 #ifndef EMPLACEABLE_H
  10 #define EMPLACEABLE_H
  11
  12 #include <functional>
  13 #include "test_macros.h"
  14
  15 #if TEST_STD_VER >= 11
  16
  17 class Emplaceable
  18 {
  19     Emplaceable(const Emplaceable&);
  20     Emplaceable& operator=(const Emplaceable&);
  21
  22     int int_;
  23     double double_;
  24 public:
  25     Emplaceable() : int_(0), double_(0) {}
  26     Emplaceable(int i, double d) : int_(i), double_(d) {}
  27     Emplaceable(Emplaceable&& x)
  28         : int_(x.int_), double_(x.double_)
  29             {x.int_ = 0; x.double_ = 0;}
  30     Emplaceable& operator=(Emplaceable&& x)
  31         {int_ = x.int_; x.int_ = 0;
  32          double_ = x.double_; x.double_ = 0;
  33          return *this;}
  34
  35     bool operator==(const Emplaceable& x) const
  36         {return int_ == x.int_ && double_ == x.double_;}
  37     bool operator<(const Emplaceable& x) const
  38         {return int_ < x.int_ || (int_ == x.int_ && double_ < x.double_);}
  39
  40     int get() const {return int_;}
  41 };
  42
  43 namespace std {
  44
  45 template <>
  46 struct hash<Emplaceable>
  47 {
  48     typedef Emplaceable argument_type;
  49     typedef std::size_t result_type;
  50
  51     std::size_t operator()(const Emplaceable& x) const {return x.get();}
  52 };
  53
  54 }
  55
  56 #endif // TEST_STD_VER >= 11
  57 #endif // EMPLACEABLE_H