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// Copyright (C) 2009-2012 Lorenzo Caminiti
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// Distributed under the Boost Software License, Version 1.0
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// (see accompanying file LICENSE_1_0.txt or a copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Home at http://www.boost.org/libs/local_function
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#ifndef BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_ADD_HPP_
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#define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_ADD_HPP_
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#include <boost/preprocessor/control/expr_iif.hpp>
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#include <boost/preprocessor/logical/compl.hpp>
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// `is_front_macro(tokens)` is 1 if `tokens` start w/ `keyword` to add, else 0.
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#define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_ADD_FRONT( \
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tokens, is_front_macro, keyword) \
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BOOST_PP_EXPR_IIF(BOOST_PP_COMPL(is_front_macro(tokens)), keyword) tokens
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// `is_back_macro(tokens)` is 1 if `tokens` end with `keyword` to add, else 0.
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#define BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_FACILITY_ADD_BACK( \
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tokens, is_back_macro, keyword) \
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tokens BOOST_PP_EXPR_IIF(BOOST_PP_COMPL(is_back_macro(tokens)), keyword)
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#endif // #include guard
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