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Re: st: How can I change Stata's regular expression parser to use Perl's parser, so that I can use perl compatible regular expressions (i.e. the same regular expression syntax that I use with Perl)
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: How can I change Stata's regular expression parser to use Perl's parser, so that I can use perl compatible regular expressions (i.e. the same regular expression syntax that I use with Perl)
Date
Fri, 16 Nov 2012 12:31:02 +0000
You can't do this. Stata's regex code is built-in. You could use Perl
in conjunction with Stata, or write your Stata programs based on
Perl's internal code, but you can't do as you ask.
Nick
On Fri, Nov 16, 2012 at 12:17 PM, Shafique Jamal
<[email protected]> wrote:
> Would anyone know how to change Stata's regular expression parser to
> use Perl's parser, so that I can use perl compatible regular
> expressions (i.e. the same regular expression syntax that I use when
> using Perl)?
>
> Here is what is in the help page for Stata's regular expression
> parser: "Regular expression syntax is based on Henry Spencer's NFA
> algorithm, and this is nearly identical to the POSIX.2 standard."
>
> I find, however, that Perl's regular expression engine is more
> powerful and I find its additional features useful.
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