blob: b7d62b71374cdb4ce7c073d8da9fc76ba629bace [file] [log] [blame]
Howard Hinnant3e519522010-05-11 19:42:16 +00001#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
40
41#endif