Macro BOOST_VMD_IS_PARENS_EMPTY

Macro BOOST_VMD_IS_PARENS_EMPTY_D

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

Synopsis

// In header: <boost/vmd/is_parens_empty.hpp>

BOOST_VMD_IS_PARENS_EMPTY_D(d, sequence)

Description

d = The next available BOOST_PP_WHILE iteration.
sequence = a VMD sequence

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

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