Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
BOOST_VMD_IS_SEQ — Determines if a sequence is a Boost PP seq.
// In header: <boost/vmd/is_seq.hpp>
BOOST_VMD_IS_SEQ(sequence)The macro checks that the sequence is a Boost PP seq. It returns 1 if it is a seq, else if returns 0.
sequence = a possible Boost PP seq
returns = 1 if it a seq, else returns 0.
A single set of parentheses, with a single element, is parsed as a tuple and not a seq. To be parsed as a seq the input needs to be more than one consecutive sets of parentheses, each with a single element of data.