forked from OSchip/llvm-project
51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MOVEONLY_H
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#define MOVEONLY_H
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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#include <cstddef>
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#include <functional>
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class MoveOnly
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{
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MoveOnly(const MoveOnly&);
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MoveOnly& operator=(const MoveOnly&);
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int data_;
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public:
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MoveOnly(int data = 1) : data_(data) {}
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MoveOnly(MoveOnly&& x)
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: data_(x.data_) {x.data_ = 0;}
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MoveOnly& operator=(MoveOnly&& x)
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{data_ = x.data_; x.data_ = 0; return *this;}
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int get() const {return data_;}
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bool operator==(const MoveOnly& x) const {return data_ == x.data_;}
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bool operator< (const MoveOnly& x) const {return data_ < x.data_;}
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};
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namespace std {
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template <>
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struct hash<MoveOnly>
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: public std::unary_function<MoveOnly, std::size_t>
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{
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std::size_t operator()(const MoveOnly& x) const {return x.get();}
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};
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}
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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#endif // MOVEONLY_H
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