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/**
* Copyright (C) 2020-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/base/string_data.h"
/**
* Defines an `enum class ENUM_` populated by `LIST_`.
* Also defines an associated function `toStringData(ENUM_)`.
*
* Example:
* Define an enum class mongo::MyColors.
*
* namespace mongo {
* #define MYCOLORS_TABLE(X) \
* X(red) \
* X(green) \
* X(blue)
*
* QUERY_UTIL_NAMED_ENUM_DEFINE(MyColors, MYCOLORS_TABLE)
* #undef MYCOLORS_TABLE
* } // namespace mongo
*
* Its elements are MyColors::red, MyColors::green, and MyColors::blue. We
* also define an associated toStringData(MyColors) function which returns
* the unqualified value names "red", "green", "blue" as constexpr
* StringData.
*/
#define QUERY_UTIL_NAMED_ENUM_DEFINE(ENUM_, LIST_) \
enum class ENUM_ { LIST_(QUERY_UTIL_NAMED_ENUM_INTERNAL_X_) }; \
constexpr StringData toStringData(ENUM_ v_) { \
constexpr StringData arr_[] = {LIST_(QUERY_UTIL_NAMED_ENUM_INTERNAL_X_SD_)}; \
return arr_[static_cast<size_t>(v_)]; \
}
#define QUERY_UTIL_NAMED_ENUM_INTERNAL_X_(x) x,
#define QUERY_UTIL_NAMED_ENUM_INTERNAL_X_SD_(x) #x ""_sd,
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