// Copyright 2014 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.
// This file contains macros and macro-like constructs (e.g., templates) that // are commonly used throughout Chromium source. (It may also contain things // that are closely related to things that are commonly used that belong in this // file.)
#ifndef BASE_MACROS_H_ #define BASE_MACROS_H_
// ALL DISALLOW_xxx MACROS ARE DEPRECATED; DO NOT USE IN NEW CODE. // Use explicit deletions instead. See the section on copyability/movability in // //styleguide/c++/c++-dos-and-donts.md for more information.
// Put this in the declarations for a class to be uncopyable. #define DISALLOW_COPY(TypeName) \ TypeName(constTypeName&) = delete
// Put this in the declarations for a class to be unassignable. #define DISALLOW_ASSIGN(TypeName) TypeName& operator=(constTypeName&) = delete
// Put this in the declarations for a class to be uncopyable and unassignable. #define DISALLOW_COPY_AND_ASSIGN(TypeName) \
DISALLOW_COPY(TypeName); \
DISALLOW_ASSIGN(TypeName)
// A macro to disallow all the implicit constructors, namely the // default constructor, copy constructor and operator= functions. // This is especially useful for classes containing only static methods. #define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \ TypeName() = delete; \
DISALLOW_COPY_AND_ASSIGN(TypeName)
// Used to explicitly mark the return value of a function as unused. If you are // really sure you don't want to do anything with the return value of a function // that has been marked WARN_UNUSED_RESULT, wrap it with this. Example: // // std::unique_ptr<MyType> my_var = ...; // if (TakeOwnership(my_var.get()) == SUCCESS) // ignore_result(my_var.release()); // template<typename T> inlinevoid ignore_result(const T&) {
}
#endif// BASE_MACROS_H_
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