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Re: regular expressions

• To: Joe English <jenglish@f...>
• Subject: Re: regular expressions
• From: Norman Gray <norman@a...>
• Date: Thu, 29 Jan 2004 21:47:24 +0000 (GMT)
• Cc: xml-dev@l...
• In-reply-to: <200401292112.i0TLCfo22318@d...>

Greetings,

On Thu, 29 Jan 2004, Joe English wrote:

> David Tolpin wrote:
> 
> > Providing a structured syntax, similar to that for XML, would help reading an
> > d debugging
> > them, for example,
> >
> >     s-pattern="""
> >       comment = "\(([^\(\)\\]|\\.)*\)"
> >       atom = "[a-zA-Z0-9!#$%&'*+\-/=?\^_`{|}~]+"
> >       atoms = atom "(\." atom ")*"
> >       [...]
> >
> > Why isn't it done?
> 
> 
> HyLex used a similar syntax for regular expressions.
> I've always wondered why the idea never caught on elsewhere.

It probably didn't come from HyTime, but scsh (a scheme shell) has
legible regexps: http://www.scsh.net/docu/html/man-Z-H-7.html#node_sec_6.3

It'd probably be very straightforward to produce the sort of
structured, legible, syntax that David is talking of.

> (Then again, none of the ideas from HyTime ever really
> caught on...)

Not directly, but I suspect quite a few sneaked in the XML back door.

Norman


-- 
---------------------------------------------------------------------------
Norman Gray                        http://www.astro.gla.ac.uk/users/norman/
Physics and Astronomy, University of Glasgow, UK     norman@a...

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  • Re: regular expressions
    • From: Joe English <jenglish@f...>

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