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