1 /* 2 * Copyright (c) 2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef META_BASE_MACROS_H 17 #define META_BASE_MACROS_H 18 19 // older versions of msvc (prior Visual Studio 2019 version 16.5) consider __VA_ARGS__ as single token 20 // using META_EXPAND is the workaround to threat it as multiple tokens 21 #ifndef META_EXPAND 22 #define META_EXPAND(x) x 23 #endif 24 25 // machinery used to implement macro "overloading" based on number of arguments 26 #define META_GET_MACRO2_IMPL(p0, p1, macro, ...) macro 27 #define META_GET_MACRO3_IMPL(p0, p1, p2, macro, ...) macro 28 #define META_GET_MACRO4_IMPL(p0, p1, p2, p3, macro, ...) macro 29 #define META_GET_MACRO5_IMPL(p0, p1, p2, p3, p4, macro, ...) macro 30 31 #endif 32