# Boost C++ Libraries

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### boost/vmd/is_parens_empty.hpp


//  (C) Copyright Edward Diener 2011-2015
//  Use, modification and distribution are subject to the Boost Software License,
//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

#if !defined(BOOST_VMD_IS_PARENS_EMPTY_HPP)
#define BOOST_VMD_IS_PARENS_EMPTY_HPP

#include <boost/vmd/detail/setup.hpp>

#include <boost/vmd/detail/is_empty_tuple.hpp>

/*

The succeeding comments in this file are in doxygen format.

*/

/** \file
*/

/** \def BOOST_VMD_IS_PARENS_EMPTY(sequence)

\brief Determines if the sequence is a set of parens with no data.

sequence = a VMD sequence

returns = 1 if the sequence is a set of parens with no data,
else returns 0.

@code

A set of parens with no data may be:

1) a tuple whose size is a single element which is empty

or

2) a single element seq whose data is empty

@endcode

*/

#define BOOST_VMD_IS_PARENS_EMPTY(sequence) \
BOOST_VMD_DETAIL_IS_EMPTY_TUPLE(sequence) \
/**/

/** \def BOOST_VMD_IS_PARENS_EMPTY_D(d,sequence)

\brief Determines if the sequence is a set of parens with no data. Re-entrant version.

d        = The next available BOOST_PP_WHILE iteration. <br/>
sequence = a VMD sequence

returns = 1 if the sequence is a set of parens with no data,
else returns 0.

@code

A set of parens with no data may be:

1) a tuple whose size is a single element which is empty

or

2) a single element seq whose data is empty

@endcode

*/

#define BOOST_VMD_IS_PARENS_EMPTY_D(d,sequence) \
BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_D(d,sequence) \
/**/