| // Copyright 2023 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // The following macros are used to declare both the action id enumerations and |
| // the stringized names of the enumeration elements for use in persisting the |
| // actions. To stringize the element names, define STRINGIZE_ACTION_IDS prior to |
| // including this file. This file is intended to be included just before and |
| // just after the enumeration or string array declarations. |
| |
| #if !defined(ACTION_ID_MACROS_DEFINED) |
| #define ACTION_ID_MACROS_DEFINED |
| #if defined(STRINGIZE_ACTION_IDS) |
| // Convert first token to string, throw away the rest. |
| #define D1(enum_name) #enum_name |
| #define D2(enum_name, enum_value) #enum_name |
| #else // defined(STRINGIZE_ACTION_IDS) |
| // Declare enum with optional assigned value. |
| #define D1(enum_name) enum_name |
| #define D2(enum_name, enum_value) enum_name = enum_value |
| #endif // defined(STRINGIZE_ACTION_IDS) |
| // Select which token in the declaration is the assigned value. |
| // Use first and optional third token, ignore optional second. |
| #define E1(enum_name) D1(enum_name) |
| #define E2(enum_name, old_enum_name) D1(enum_name) |
| #define E3(enum_name, old_enum_name, enum_value) D2(enum_name, enum_value) |
| #define GET_E(_1, _2, _3, macro_name, ...) macro_name |
| #define E(...) GET_E(__VA_ARGS__, E3, E2, E1)(__VA_ARGS__), |
| #else // !defined(ACTION_ID_MACROS_DEFINED) |
| #undef D1 |
| #undef D2 |
| #undef E1 |
| #undef E2 |
| #undef E3 |
| #undef GET_E |
| #undef E |
| #undef ACTION_ID_MACROS_DEFINED |
| #endif // !defined(ACTION_ID_MACROS_DEFINED) |
