58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
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// (C) Copyright Edward Diener 2015
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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#if !defined(BOOST_VMD_SEQ_REMOVE_HPP)
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#define BOOST_VMD_SEQ_REMOVE_HPP
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#include <boost/vmd/detail/setup.hpp>
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#if BOOST_PP_VARIADICS
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#include <boost/preprocessor/comparison/equal.hpp>
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#include <boost/preprocessor/control/iif.hpp>
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#include <boost/preprocessor/logical/bitand.hpp>
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#include <boost/preprocessor/seq/remove.hpp>
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#include <boost/preprocessor/seq/size.hpp>
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#include <boost/vmd/empty.hpp>
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/*
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The succeeding comments in this file are in doxygen format.
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*/
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/** \file
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*/
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/** \def BOOST_VMD_SEQ_REMOVE(seq,index)
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\brief removes an element from a seq.
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seq = seq from which an element is to be removed.
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index = The zero-based position in seq of the element to be removed.
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If index is greater or equal to the seq size the result is undefined.
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If the seq is a single element and the index is 0 the result is an empty seq.
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Otherwise the result is a seq after removing the index element.
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*/
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#define BOOST_VMD_SEQ_REMOVE(seq,index) \
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BOOST_PP_IIF \
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( \
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BOOST_PP_BITAND \
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( \
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BOOST_PP_EQUAL(index,0), \
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BOOST_PP_EQUAL(BOOST_PP_SEQ_SIZE(seq),1) \
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), \
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BOOST_VMD_EMPTY, \
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BOOST_PP_SEQ_REMOVE \
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) \
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(seq,index) \
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/**/
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#endif /* BOOST_PP_VARIADICS */
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#endif /* BOOST_VMD_SEQ_REMOVE_HPP */
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