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From Eric Covener <cove...@gmail.com>
Subject Re: Expression Parser: search and replace with s/PATTERN/REPLACEMENT/FLAGS
Date Thu, 01 Oct 2015 12:33:13 GMT
On Thu, Oct 1, 2015 at 6:26 AM, Rainer Jung <rainer.jung@kippdata.de> wrote:
> Since it gets more common to use the expression parser for string operations
> and not only for boolean checks, I think it would be useful (and powerful)
> to support
>
> s/PATTERN/REPLACEMENT/FLAGS
>
> and allow back references in REPLACEMENT. The operation would not try to do
> the replacement in place but create a new string according to the given
> PATTERN and REPLACEMENT.
>
> I had a quick look at the flex and bison files which generate lexer and
> parser but must admit that it wasn't immediately obvious to me how to do it.
> I can try harder but first wanted to ask if there are any volunteers who
> know that technology better than me. Stefan (Frisch)? Others?
>
> Otherwise I'll try myself (and learn new stuff on the way).

I've tried and failed to hack the exact same thing in a few times.  I
agree it would be great to have.

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