1 // Copyright 2013 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 // Annotate a virtual method indicating it must be overriding a virtual method 11 // in the parent class. Use like: 12 // virtual void foo() OVERRIDE; 13 #if defined(_MSC_VER) || defined(__clang__) 14 #define MOJO_OVERRIDE override 15 #else 16 #define MOJO_OVERRIDE 17 #endif 18 19 // A macro to disallow the copy constructor and operator= functions. 20 // This should be used in the private: declarations for a class. 21 #define MOJO_DISALLOW_COPY_AND_ASSIGN(TypeName) \ 22 TypeName(const TypeName&); \ 23 void operator=(const TypeName&) 24 25 // Used to calculate the number of elements in an array. 26 // (See |arraysize()| in Chromium's base/basictypes.h for more details.) 27 namespace mojo { 28 template <typename T, size_t N> 29 char (&ArraySizeHelper(T (&array)[N]))[N]; 30 #if !defined(_MSC_VER) 31 template <typename T, size_t N> 32 char (&ArraySizeHelper(const T (&array)[N]))[N]; 33 #endif 34 } // namespace mojo 35 #define MOJO_ARRAYSIZE(array) (sizeof(::mojo::ArraySizeHelper(array))) 36 37 // Used to make a type move-only in C++03. See Chromium's base/move.h for more 38 // details. 39 #define MOJO_MOVE_ONLY_TYPE_FOR_CPP_03(type, rvalue_type) \ 40 private: \ 41 struct rvalue_type { \ 42 explicit rvalue_type(type* object) : object(object) {} \ 43 type* object; \ 44 }; \ 45 type(type&); \ 46 void operator=(type&); \ 47 public: \ 48 operator rvalue_type() { return rvalue_type(this); } \ 49 type Pass() { return type(rvalue_type(this)); } \ 50 typedef void MoveOnlyTypeForCPP03; \ 51 private: 52 53 #endif // MOJO_PUBLIC_CPP_SYSTEM_MACROS_H_ 54
