Actually Perl6 does enforce it if you tell it to. The following fails to match. 'abc' ~~ m:ratchet/ .* c / The `.*` gobbles everything up, which means the

Actually Perl6 does enforce it if you tell it to. The following fails to match. 'abc' ~~ m:ratchet/ .* c / The `.*` gobbles everything up, which means there is nothing left for `c` When writing grammars, use `token` which turns on `:ratchet` for you.