On 1/25/2012 12:16 PM, Rick Johnson wrote:

(?...)  # Base Extension Syntax
All extensions are wrapped in parenthesis and start with a question
mark, but i believe the question mark was a very bad choice, since the

I think that syntax came either from Perl or the pcre library used by several open source programs, including several Python versions.
https://en.wikipedia.org/wiki/Pcre
has  some info on this.

--
Terry Jan Reedy

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