Re: Lua 5.3.3 empty match behaviour with the '-' modifier
[
Date Prev][
Date Next][
Thread Prev][
Thread Next]
[
Date Index]
[
Thread Index]
- Subject: Re: Lua 5.3.3 empty match behaviour with the '-' modifier
- From: Roberto Ierusalimschy <roberto@...>
- Date: 2016年5月12日 11:07:16 -0300
> Must we conclude, therefore, that the '-' modifier as the last character of
> a pattern will never match any character of the class it modifies?
Sure. PiL says that since its first edition:
https://www.lua.org/pil/20.4.html
"It never makes sense to write a pattern that begins or ends with the
modifier '-'"
(although the part about not *beginning* with a '-' is not exactly true...)
-- Roberto