1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
13 #include <functional> // for std::hash
15 #include "test_macros.h"
17 struct Counter_base { static int gConstructed; };
20 class Counter : public Counter_base
23 Counter() : data_() { ++gConstructed; }
24 Counter(const T &data) : data_(data) { ++gConstructed; }
25 Counter(const Counter& rhs) : data_(rhs.data_) { ++gConstructed; }
26 Counter& operator=(const Counter& rhs) { ++gConstructed; data_ = rhs.data_; return *this; }
27 #if TEST_STD_VER >= 11
28 Counter(Counter&& rhs) : data_(std::move(rhs.data_)) { ++gConstructed; }
29 Counter& operator=(Counter&& rhs) { ++gConstructed; data_ = std::move(rhs.data_); return *this; }
31 ~Counter() { --gConstructed; }
33 const T& get() const {return data_;}
35 bool operator==(const Counter& x) const {return data_ == x.data_;}
36 bool operator< (const Counter& x) const {return data_ < x.data_;}
42 int Counter_base::gConstructed = 0;
47 struct hash<Counter<T> >
48 : public std::unary_function<Counter<T>, std::size_t>
50 std::size_t operator()(const Counter<T>& x) const {return std::hash<T>(x.get());}