// 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_ 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_