Xiaozhou Liu wrote: > Hi Vimmers, > > During the development of the new regexp, one thing confuses me a lot: > ordered alternation. (e.g. given r.e. 'ab\|abc' and text 'abc', 'ab' > matched, not 'abc') > > I know that 100% compatibility is one of the project goals. So I try > to keep this feature > in the new regexp. But the problem is, ordered alternation is kind of > 'side effect' > of the original back track regexp matcher. AFAIK, It is very hard to > implement this > feature in the new, truly NFA matcher, if it is not impossible. We can resort > to the original regexp when we see '\|', but we don't solve the > problem perfectly. > > So does anyone really need this feature to be kept? If so, please do tell me. > For me, the removal of this 'feature' won't break anything.
I prefer the behaviour which I presume you have in your NFA implementation, of preferring longer matches, just as * is greedy by default, so would actually welcome the change. Ben. --~--~---------~--~----~------------~-------~--~----~ You received this message from the "vim_dev" maillist. For more information, visit http://www.vim.org/maillist.php -~----------~----~----~----~------~----~------~--~---
