...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::parser::eps
// In header: <boost/parser/parser.hpp> unspecified eps;
The epsilon parser. This matches anything, and consumes no input. If used with an optional predicate, like eps(pred)
, it matches iff pred(ctx)
evaluates to true, where ctx
is the parser context.