use Test; grammar g { rule port { <pnamelist> + %% ","} token pnamelist { <id> + } token id { \w } } class a { method port ($/) { make $<pnamelist>.map(*.made.Slip ) } method pnamelist ($/) { make $<id>>>.made } method id ($/ ) { make $/.Str } } my $r = g.parse("ab,cd", :rule('port'), :actions(a) ).made; say $r;