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➜ MUSHclient
➜ General
➜ Regular Expression Help
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| Posted by
| JSteele1234
USA (27 posts) Bio
|
| Date
| Sun 03 Jun 2001 07:20 AM (UTC) |
| Message
| | I noticed there's a thing to match specific words "^(Blah|Qaz|etc..)", but is there something like that that will make it NOT match to given words? |
~ JSteele1234 ~ | | Top |
|
| Posted by
| Nick Gammon
Australia (23,173 posts) Bio
Forum Administrator |
| Date
| Reply #1 on Sun 03 Jun 2001 08:59 AM (UTC) |
| Message
| Yes, there is. I quote from the file: RegularExpressions.txt that ships with MUSHclient:
Lookbehind assertions start with (?<= for positive asser-
tions and (?<! for negative assertions. For example,
(?<!foo)bar
does find an occurrence of "bar" that is not preceded by
"foo". The contents of a lookbehind assertion are restricted
such that all the strings it matches must have a fixed
length. However, if there are several alternatives, they do
not all have to have the same fixed length. Thus
(?<=bullock|donkey)
is permitted, but
(?<!dogs?|cats?)
causes an error at compile time. Branches that match dif-
ferent length strings are permitted only at the top level of
a lookbehind assertion.
|
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
|
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