external/bsd/libc++/dist/libcxx/test/support/MoveOnly.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef MOVEONLY_H
  11 #define MOVEONLY_H
  12
  13 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
  14
  15 #include <cstddef>
  16 #include <functional>
  17
  18 class MoveOnly
  19 {
  20     MoveOnly(const MoveOnly&);
  21     MoveOnly& operator=(const MoveOnly&);
  22
  23     int data_;
  24 public:
  25     MoveOnly(int data = 1) : data_(data) {}
  26     MoveOnly(MoveOnly&& x)
  27         : data_(x.data_) {x.data_ = 0;}
  28     MoveOnly& operator=(MoveOnly&& x)
  29         {data_ = x.data_; x.data_ = 0; return *this;}
  30
  31     int get() const {return data_;}
  32
  33     bool operator==(const MoveOnly& x) const {return data_ == x.data_;}
  34     bool operator< (const MoveOnly& x) const {return data_ <  x.data_;}
  35 };
  36
  37 namespace std {
  38
  39 template <>
  40 struct hash<MoveOnly>
  41     : public std::unary_function<MoveOnly, std::size_t>
  42 {
  43     std::size_t operator()(const MoveOnly& x) const {return x.get();}
  44 };
  45
  46 }
  47
  48 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
  49
  50 #endif  // MOVEONLY_H