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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef COUNTER_H
#define COUNTER_H
#include <functional> // for std::hash
#include "test_macros.h"
struct Counter_base { static int gConstructed; };
template <typename T>
class Counter : public Counter_base
{
public:
Counter() : data_() { ++gConstructed; }
Counter(const T &data) : data_(data) { ++gConstructed; }
Counter(const Counter& rhs) : data_(rhs.data_) { ++gConstructed; }
Counter& operator=(const Counter& rhs) { data_ = rhs.data_; return *this; }
#if TEST_STD_VER >= 11
Counter(Counter&& rhs) : data_(std::move(rhs.data_)) { ++gConstructed; }
Counter& operator=(Counter&& rhs) { data_ = std::move(rhs.data_); return *this; }
#endif
~Counter() { --gConstructed; }
const T& get() const {return data_;}
bool operator==(const Counter& x) const {return data_ == x.data_;}
bool operator< (const Counter& x) const {return data_ < x.data_;}
private:
T data_;
};
int Counter_base::gConstructed = 0;
namespace std {
template <class T>
struct hash<Counter<T> >
{
typedef Counter<T> argument_type;
typedef std::size_t result_type;
std::size_t operator()(const Counter<T>& x) const {return std::hash<T>()(x.get());}
};
}
#endif
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