Re: Regex 'Absent Operator'

[Ulrich Schmidt <u.sch.zw@...>]

Am 27.03.2017 um 12:25 schrieb Scott Morgan:
> Apparently Ruby's new release has added a new 'absent operator' to it's
> regex engine.
>
> https://medium.com/rubyinside/the-new-absent-operator-in-ruby-s-regular-expressions-7c3ef6cd0b99
>
> Based on some academic paper (linked in article, but in Japanese), it's
> supposed to help in certain cases matching things that are awkward or
> impossible without (C style comments '/* ... */' is one example[0]).
> It's a bit subtle in it's behaviour and uses.
>
> Worth considering for Lua's pattern match system?
>
> Scott
>
> [0] That is '/* okay */' but avoiding '/* wrong */ */'

For all that pattern matching stuff we can use lpeg. Why implement some
new regex features that bloat the lua library?

u.s.