1 2 /** 3 * Copyright (C) 2018-present MongoDB, Inc. 4 * 5 * This program is free software: you can redistribute it and/or modify 6 * it under the terms of the Server Side Public License, version 1, 7 * as published by MongoDB, Inc. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * Server Side Public License for more details. 13 * 14 * You should have received a copy of the Server Side Public License 15 * along with this program. If not, see 16 * <http://www.mongodb.com/licensing/server-side-public-license>. 17 * 18 * As a special exception, the copyright holders give permission to link the 19 * code of portions of this program with the OpenSSL library under certain 20 * conditions as described in each individual source file and distribute 21 * linked combinations including the program with the OpenSSL library. You 22 * must comply with the Server Side Public License in all respects for 23 * all of the code used other than as permitted herein. If you modify file(s) 24 * with this exception, you may extend this exception to your version of the 25 * file(s), but you are not obligated to do so. If you do not wish to do so, 26 * delete this exception statement from your version. If you delete this 27 * exception statement from all source files in the program, then also delete 28 * it in the license file. 29 */ 30 31 #pragma once 32 33 #include <string> 34 #include <vector> 35 36 /** 37 * Utility macro to construct a std::vector<std::string> from a sequence of C-style 38 * strings. 39 * 40 * Usage: MONGO_MAKE_STRING_VECTOR("a", "b", "c") returns a vector containing 41 * std::strings "a", "b", "c", in that order. 42 */ 43 #define MONGO_MAKE_STRING_VECTOR(...) ::mongo::_makeStringVector(0, __VA_ARGS__, NULL) 44 45 namespace mongo { 46 47 /** 48 * Create a vector of strings from varargs of C-style strings. 49 * 50 * WARNING: Only intended for use by MONGO_MAKE_STRING_VECTOR macro, defined above. Aborts 51 * ungracefully if you misuse it, so stick to the macro. 52 * 53 * The first parameter is ignored in all circumstances. The subsequent parameters must be 54 * const char* C-style strings, or NULL. Of these parameters, at least one must be 55 * NULL. Parameters at and beyond the NULL are not inserted. Typically, the NULL will be 56 * the last parameter. The MONGO_MAKE_STRING_VECTOR macro enforces this. 57 * 58 * Returns a vector of std::strings. 59 */ 60 std::vector<std::string> _makeStringVector(int ignored, ...); 61 62 } // namespace mongo 63