PCRE to RE2

[Adam Takahashi]

Hello,

I currently have a regex in PCRE that is

• (.|\r|\n)*?(?=FOO)

It reads in a random number of multiple lines of sentences, and stops when it sees the word FOO in all caps. I am have problems converting this to a valid RE2 expression. 

Any advice would help. Thanks.

[andrey mirtchovski]

I'm sorry to say that this list isn't RE2-specific (although one of
the main Go contributors wrote RE2). you will probably get very good
suggestions on how to convert that to Go's regex, which are RE2-like
and I hope you find your answer.

A good additional step to do for this particular list is to concoct a
small go example on play.golang.org with some sample input that you're
struggling with.

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[Ian Lance Taylor]

The Go regexp library does not support (?=xxx).

It would be trivial to write this regexp as a loop that reads a series
of lines and stops when it finds a line containing FOO. See
https://commandcenter.blogspot.com/2011/08/regular-expressions-in-lexing-and.html
.

Ian