[Haskell-cafe] Missing join and split

[Stefan O'Rear]

On Fri, Dec 28, 2007 at 11:40:24PM +0100, Mitar wrote:
> Hi!
> 
> On Dec 28, 2007 5:51 PM, Lihn, Steve <horng_twu_lihn at merck.com> wrote:
> > Since regex is involved, it is specific to (Byte)String, not a generic
> > list.
> 
> Oh, this gives me an interesting idea: making regular expressions more generic.
> 
> Would not it be interesting and useful (but not really efficient) to
> have patterns something like:
> 
> foo :: Eq a => a -> ...
> foo (_{4}'b') = ...

Your idea has precedent, albeit only in an april fool's joke.

http://www.dcs.gla.ac.uk/~partain/haskerl/partain-1.html

(section 5, "(Polymorphic) Regular expressions")

Stefan
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
Url : http://www.haskell.org/pipermail/haskell-cafe/attachments/20071228/77c7094a/attachment.bin