module lang::sdf2::filters::PreferAvoid

rascal-0.34.0

Usage

import lang::sdf2::filters::PreferAvoid;

Dependencies

import ParseTree;
import Set;

function preferAvoidFilter

Import his module if you want prefer/avoid filtering enabled for your grammar. Use @prefer and @avoid to label alternatives.

&T <:Tree preferAvoidFilter(amb(set[&T <:Tree] alternatives))