I've this Regex:
(\[\[.*?\]\])(?<!".*?)
and this test data:
[[Hello]]
<tag Text="my [[Test]] is [[Test2]] for [[Test3]][[Test4]]">
How can I get that look-behind to ignore those that are preceded by a "?
It should match the [[Hello]] but not the remainder. However, it is of course matching them all.
Your regular expression actually does the job for your specific input, I would write.. ( Working Demo )
\[\[[^]]*\]\](?<!"[^"]*)
You may also consider using the alternation operator in context placing what you want to exclude on the left, ( saying throw this away, it's garbage ) and place what you want to match in a capturing group on the right side.
And then you can refer to the capturing group to get your match result. ( Working Demo )
"[^"]*"|(\[\[[^]]*\]\])
You can use the regex technique to discard what you dont want. It consists of having a pattern line:
discard1|other discard|more crap|(the content I want)
Notice that the content you want is the one on the rightest side and within capturing groups:
Said that, you can use this regex:
.*".*".*|.*?(\[\[.*?\]\]).*?
MATCH 1
1. [0-9] `[[Hello]]`
On the other hand, if you want to use regex lookaround (lookbehind and lookahead) you can use this regex:
(?<!").*?(\[\[.*?\]\])(?!.*")
But I like the discard technique, it's very clear and can save many headaches. You can learn many about it if you look for zx81, anubhava posts, they rock on regex.
