Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for a snapshot of the develop branch, built from commit 7adc646bf0.


//  (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

#if !defined(BOOST_VMD_SEQ_SIZE_HPP)

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


#include <boost/preprocessor/control/iif.hpp>
#include <boost/preprocessor/seq/size.hpp>
#include <boost/vmd/identity.hpp>
#include <boost/vmd/is_empty.hpp>


  The succeeding comments in this file are in doxygen format.


/** \file

/** \def BOOST_VMD_SEQ_SIZE(seq)

    \brief  expands to the size of the seq passed to it. 

    seq = seq whose size is to be extracted. 
    If the seq is an empty seq its size is 0.
    Otherwise the result is the number of elements in the seq.

#define BOOST_VMD_SEQ_SIZE(seq) \
        ( \
        BOOST_PP_IIF \
            ( \
            BOOST_VMD_IS_EMPTY(seq), \
            BOOST_VMD_IDENTITY(0), \
            BOOST_PP_SEQ_SIZE \
            ) \
        (seq) \
        ) \