MoveOnly.h revision c52f43e72dfcea03037729649da84c23b3beb04a 
1#ifndef MOVEONLY_H
2#define MOVEONLY_H
3
4#ifdef _LIBCPP_MOVE
5
6#include <cstddef>
7#include <functional>
8
9class MoveOnly
10{
11    MoveOnly(const MoveOnly&);
12    MoveOnly& operator=(const MoveOnly&);
13
14    int data_;
15public:
16    MoveOnly(int data = 1) : data_(data) {}
17    MoveOnly(MoveOnly&& x)
18        : data_(x.data_) {x.data_ = 0;}
19    MoveOnly& operator=(MoveOnly&& x)
20        {data_ = x.data_; x.data_ = 0; return *this;}
21
22    int get() const {return data_;}
23
24    bool operator==(const MoveOnly& x) const {return data_ == x.data_;}
25    bool operator< (const MoveOnly& x) const {return data_ <  x.data_;}
26};
27
28namespace std {
29
30template <>
31struct hash<MoveOnly>
32    : public std::unary_function<MoveOnly, std::size_t>
33{
34    std::size_t operator()(const MoveOnly& x) const {return x.get();}
35};
36
37}
38
39#endif  // _LIBCPP_MOVE
40
41#endif  // MOVEONLY_H
42