# Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world.

### boost/vmd/is_list.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_LIST_HPP)
#define BOOST_VMD_IS_LIST_HPP

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

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

/*

The succeeding comments in this file are in doxygen format.

*/

/** \file
*/

/** \def BOOST_VMD_IS_LIST(sequence)

\brief Determines if a sequence is a Boost pplib list.

The macro checks that the sequence is a pplib list.
It returns 1 if it is a list, else if returns 0.

sequence = input as a possible Boost PP list.

returns = 1 if it a list, else returns 0.

The macro will generate a preprocessing error if the input
is in the form of a list but its end-of-list marker, instead
of being an identifier, is a preprocessor token which VMD cannot parse,
as in the example '(anything,&BOOST_PP_NIL)' which is a valid tuple but
an invalid list.

*/

#define BOOST_VMD_IS_LIST(sequence) \
BOOST_VMD_DETAIL_IS_LIST(sequence) \
/**/

/** \def BOOST_VMD_IS_LIST_D(d,sequence)

\brief Determines if a sequence is a Boost pplib list. Re-entrant version.

The macro checks that the sequence is a pplib list.
It returns 1 if it is a list, else if returns 0.

d        = The next available BOOST_PP_WHILE iteration. <br/>
sequence = input as a possible Boost PP list.

returns = 1 if it a list, else returns 0.

The macro will generate a preprocessing error if the input
is in the form of a list but its end-of-list marker, instead
of being an identifier, is a preprocessor token which VMD cannot parse,
as in the example '(anything,&BOOST_PP_NIL)' which is a valid tuple but
an invalid list.

*/

#define BOOST_VMD_IS_LIST_D(d,sequence) \
BOOST_VMD_DETAIL_IS_LIST_D(d,sequence) \
/**/