On Sat, 11 Oct 2014 05:05:48 -0700, pmichaud wrote: > 11:55 <pmichaud> r: say "abcde" ~~ / ab <![e]> cde | ab.. / # LTM > fail > 11:55 <camelia> rakudo-{parrot,moar} fd017a: OUTPUT«「abcd」» > > Correct should be "abcde", since he first alternation has a longer > token to be matched. > > Per S05:2887: > > [...] So LTM completely ignores negative lookaheads, and > continues to look for pure patterns in whatever follows the negative > lookahead. You might say that positive lookaheads are opaque to LTM, > but negative lookaheads are transparent to LTM. > > Pm
Still broken in Rakudo version 2018.02-12-ge3c4db732 built on MoarVM version 2018.02 dogbert@dogbert-VirtualBox ~ $ perl6 -e 'say "abcde" ~~ / ab <![e]> cde | ab.. / ' 「abcd」