Re: [PATCH] add regexp-split

[Marijn]

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On 29-12-11 10:32, Nala Ginrut wrote:
> hi guilers! It seems like there's no "regexp-split" procedure in
> Guile. What we have is "string-split" which accepted Char only. So
> I wrote one for myself.
> 
> ------python code-----
>>>> import re re.split("([^0-9])", "123+456*/")
> [’123’, ’+’, ’456’, ’*’, ’’, ’/’, ’’] --------code end-------
> 
> The Guile version:
> 
> ----------guile code------- (regexp-split "([^0-9])"  "123+456*/") 
> ==>("123" "+" "456" "*" "" "/" "") ----------code end--------
> 
> Anyone interested in it?

Hi there,

I think we're all happy that Guile is getting this support, however I
couldn't help but notice that the above results look a bit funny and
indeed are incompatible with racket's implementation:

> (regexp-split "([^0-9])" "123+456*/")
'("123" "456" "" "")

Apparently because their version doesn't support capturing groups in
this function. I've raised the issue with them as well, but there are
some doubts that it is useful/sane to support this. Perhaps other
schemes' regexp libraries should be compared as well. Their tests
would certainly be useful and may point out other incompatibilities
that no-one is aware of (as well as improve your code(!)).

Marijn
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