module lang::sdf2::filters::Reject
rascal-0.34.0
Usage
import lang::sdf2::filters::Reject;
Dependencies
import ParseTree;
function rejectFilter
Import his module if you want SDF2 style reject filtering enabled for your grammar. Use @reject to label one alternative and the whole non-terminal will be filtered if it matches.
&T <: Tree rejectFilter(amb(set[&T <: Tree] alts))