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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file parc_CMacro.h
* @ingroup Macro
* @brief Utility C-Macros
*
* CMacro contains a set of utility macros for doing complicated macro processing
*
*/
#ifndef libparc_parc_CMacro_h
#define libparc_parc_CMacro_h
/**
* parcCMacro_ThridParam expands to the "3rd" input parameter whatever that may be. It is a part
* of the c-macro trick for implement a macro If-Else switch. If the first argument expands
* to a comma then this macro expands to the second parameter, otherwise it expands to the 3rd parameter.
*/
#define parcCMacro_ThirdParam(A, B, C, ...) C
/**
* parcCMacro_IfElse is a c-macro trick for implementing a macro If-Else switch.
* It uses parcCMacro_ThirdParam to select between A or B depending on whether __VA_ARGS__ expands to a comma.
*/
#define parcCMacro_IfElse(A, B, ...) parcCMacro_ThirdParam(__VA_ARGS__, A, B, NOOP)
/** \cond */
#define _parcCMacro_Cat_(A, B) A ## B
/** \endcond */
/**
* parcCMacro_Cat combines two strings into a single token.
*/
#define parcCMacro_Cat(A, B) _parcCMacro_Cat_(A, B)
#endif //libparc_parc_CMacro_h
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