[ragel-users] Expressing PCREs in Ragel

[Adrian Thurston]

Not that I'm aware of.

You'll need some parse/transform pass for PCRE to ragel. I'm no expert 
on PCRE syntax, so I can't really comment on how difficult it will be.

I can say PCRE and ragel use different implementation techniques though, 
so you may run into some road blocks on those grounds. Ragel is pure 
DFA, while PCRE uses some mix of DFA and an interpretor that backtracks.

-Adrian

On 13-03-19 08:20 AM, Ellis Breen wrote:
> Hi all,
>
> Is there a semantic element, preprocessor or component that will allow
> me to express standard PCREs in Ragel?
>
> I'm not trying to implement a regex engine, but to find the intersection
> of two PCRE search patterns. I believe I've managed to do this by
> manually rewriting PCREs into Ragel format, but I'd like to automate the
> process, as I have a large number of PCREs to compare.
>
> Any hints on how I can do this with Ragel, or an alternative?
>
> This appears to be about the closest I've found to what I need.
>
> Many thanks,
>
> Ellis
>
>
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