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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TEST_COPY_ONLY_INT_H_
#define BASE_TEST_COPY_ONLY_INT_H_
#include "base/macros.h"
namespace base {
// A copy-only (not moveable) class that holds an integer. This is designed for
// testing containers. See also MoveOnlyInt.
class CopyOnlyInt {
public:
explicit CopyOnlyInt(int data = 1) : data_(data) {}
CopyOnlyInt(const CopyOnlyInt& other) : data_(other.data_) { ++num_copies_; }
~CopyOnlyInt() { data_ = 0; }
friend bool operator==(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) {
return lhs.data_ == rhs.data_;
}
friend bool operator!=(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) {
return !operator==(lhs, rhs);
}
friend bool operator<(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) {
return lhs.data_ < rhs.data_;
}
friend bool operator>(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) {
return rhs < lhs;
}
friend bool operator<=(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) {
return !(rhs < lhs);
}
friend bool operator>=(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) {
return !(lhs < rhs);
}
int data() const { return data_; }
static void reset_num_copies() { num_copies_ = 0; }
static int num_copies() { return num_copies_; }
private:
volatile int data_;
static int num_copies_;
CopyOnlyInt(CopyOnlyInt&&) = delete;
CopyOnlyInt& operator=(CopyOnlyInt&) = delete;
};
} // namespace base
#endif // BASE_TEST_COPY_ONLY_INT_H_
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