1 // Copyright 2017 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_TEST_COPY_ONLY_INT_H_ 6 #define BASE_TEST_COPY_ONLY_INT_H_ 7 8 #include "base/macros.h" 9 10 namespace base { 11 12 // A copy-only (not moveable) class that holds an integer. This is designed for 13 // testing containers. See also MoveOnlyInt. 14 class CopyOnlyInt { 15 public: 16 explicit CopyOnlyInt(int data = 1) : data_(data) {} 17 CopyOnlyInt(const CopyOnlyInt& other) = default; 18 ~CopyOnlyInt() { data_ = 0; } 19 20 friend bool operator==(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) { 21 return lhs.data_ == rhs.data_; 22 } 23 24 friend bool operator!=(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) { 25 return !operator==(lhs, rhs); 26 } 27 28 friend bool operator<(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) { 29 return lhs.data_ < rhs.data_; 30 } 31 32 friend bool operator>(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) { 33 return rhs < lhs; 34 } 35 36 friend bool operator<=(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) { 37 return !(rhs < lhs); 38 } 39 40 friend bool operator>=(const CopyOnlyInt& lhs, const CopyOnlyInt& rhs) { 41 return !(lhs < rhs); 42 } 43 44 int data() const { return data_; } 45 46 private: 47 volatile int data_; 48 49 CopyOnlyInt(CopyOnlyInt&&) = delete; 50 CopyOnlyInt& operator=(CopyOnlyInt&) = delete; 51 }; 52 53 } // namespace base 54 55 #endif // BASE_TEST_COPY_ONLY_INT_H_ 56
