1 // Copyright 2014 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 MOJO_PUBLIC_CPP_SYSTEM_MACROS_H_ 6 #define MOJO_PUBLIC_CPP_SYSTEM_MACROS_H_ 7 8 #include "mojo/public/c/system/macros.h" 9 10 // Define a set of C++ specific macros. 11 // Mojo C++ API users can assume that mojo/public/cpp/system/macros.h 12 // includes mojo/public/c/system/macros.h. 13 14 // Annotate a virtual method indicating it must be overriding a virtual method 15 // in the parent class. Use like: 16 // virtual void foo() OVERRIDE; 17 #if defined(_MSC_VER) || defined(__clang__) 18 #define MOJO_OVERRIDE override 19 #else 20 #define MOJO_OVERRIDE 21 #endif 22 23 // A macro to disallow the copy constructor and operator= functions. 24 // This should be used in the private: declarations for a class. 25 #define MOJO_DISALLOW_COPY_AND_ASSIGN(TypeName) \ 26 TypeName(const TypeName&); \ 27 void operator=(const TypeName&) 28 29 // Used to calculate the number of elements in an array. 30 // (See |arraysize()| in Chromium's base/basictypes.h for more details.) 31 namespace mojo { 32 template <typename T, size_t N> 33 char (&ArraySizeHelper(T (&array)[N]))[N]; 34 #if !defined(_MSC_VER) 35 template <typename T, size_t N> 36 char (&ArraySizeHelper(const T (&array)[N]))[N]; 37 #endif 38 } // namespace mojo 39 #define MOJO_ARRAYSIZE(array) (sizeof(::mojo::ArraySizeHelper(array))) 40 41 // Used to make a type move-only in C++03. See Chromium's base/move.h for more 42 // details. 43 #define MOJO_MOVE_ONLY_TYPE_FOR_CPP_03(type, rvalue_type) \ 44 private: \ 45 struct rvalue_type { \ 46 explicit rvalue_type(type* object) : object(object) {} \ 47 type* object; \ 48 }; \ 49 type(type&); \ 50 void operator=(type&); \ 51 public: \ 52 operator rvalue_type() { return rvalue_type(this); } \ 53 type Pass() { return type(rvalue_type(this)); } \ 54 typedef void MoveOnlyTypeForCPP03; \ 55 private: 56 57 #endif // MOJO_PUBLIC_CPP_SYSTEM_MACROS_H_ 58
