On Mon May 11 05:26:45 2015, pmichaud wrote: > After discussion with jnthn at OSDC.no, here's what we propose: > > In the regex engine, the default FAILGOAL behavior should be to simply > fail/backtrack. This would be the default behavior for (rakudo) > Cursor as well. > > Grammars that wish to have the generate-an-exception behavior can > override FAILGOAL to do so. The HLL::Grammar class (in NQP) will do > this, meaning that Rakudo's grammar will still inherit/retain the > throw-an-exception behavior. > > Part of our reasoning (which may be faulty) for this approach is that > it's relatively easy to override FAILGOAL in a grammar but harder to > do so for regexes that aren't in a grammar. In the latter case > (regex), it's more likely that you want simple backtracking rather > than the "throw an error message", so that should be the default.
This sounds very sane. +1
