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- // Copyright 2019 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.
- // The following macros are used to declare both the color id enumerations and
- // the stringized names of the enumeration elements for use in dump_colors. To
- // stringize the element names, define STRINGIZE_COLOR_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(COLOR_ID_MACROS_DEFINED)
- #define COLOR_ID_MACROS_DEFINED
- #if defined(STRINGIZE_COLOR_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_COLOR_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_COLOR_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 E_CPONLY(...) E(__VA_ARGS__)
- #define GET_E(_1, _2, _3, macro_name, ...) macro_name
- #define E(...) GET_E(__VA_ARGS__, E3, E2, E1)(__VA_ARGS__),
- #else // !defined(COLOR_ID_MACROS_DEFINED)
- #undef D1
- #undef D2
- #undef E1
- #undef E2
- #undef E3
- #undef E_CPONLY
- #undef GET_E
- #undef E
- #undef COLOR_ID_MACROS_DEFINED
- #endif // !defined(COLOR_ID_MACROS_DEFINED)
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