Re: Suggestion

[luigi scarso <luigi.scarso@gmail.com>]

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On Fri, Jun 19, 2009 at 9:06 AM, Yue Wang <yuleopen@gmail.com> wrote:

> On Fri, Jun 19, 2009 at 2:29 PM, luigi scarso<luigi.scarso@gmail.com>
> wrote:
> >>
> >> Anyway, I highly respect the ConTeXt and LuaTeX's work.
> >> But if Taco and Hans can :
> >>
> >> - use a proper regexp library (like lrexlib?), not the silly lpeg
> >
> > PEG are not silly at all. PEG *include* regex, but not viceversa,
> > and it seems to have the same power of  CFG, so you can build a parser
> for
> > pratically anything
> > (and you can not do this with regex) .
> > Perhaps the reverse sentence has more sense: drop the "silly" (?) regex,
> use
> > the new peg.
> > For what I know the reverse side of lpeg is that a file must be loaded in
> > memory completly.
>
> Well, I don't like to know what kind of thing is superior ... micro
> kernel is superior than monolithic kernel, but...
>
Wrong paragon .
>From *mathematical*  point  of  view, the set of all regular languages
are a subset of PEG languages .
PEG are more powerful than  regex --it's not an opinion, it's a fact.


> The key reason for this is, more people are familiar with regexp. so
> if you can build a 100% compatible regexp module on top of lpeg in
> ConTeXt, it will be ok, or even better...
>
We already have lua for simple string manipulation, and lpeg for other
stuffs .
Again we don't need regex .


> >
> >> - full support of xslt:)
> >
> > why not xquery too? Are mkiv  supposed to be a full  xml processor ?
>
>
> No. I mean the user can have an option to convert an xml (that is, a
> context document) using (maybe external) xslt tool.
> This won't be too difficult to implement ...
>
hmm, external tools call for platform /SO issue ...
Personally xsltproc in linux it's OK -- I don't need
an integration ,
I prefear separations of concerns.



>
> > A bit of xslt can be done with lpeg (and not regex),
>
> a bit == far from all
>
It's enough for simple xml processing .
If you need more, are you sure that you are using  the right tool ?



>
> >> Things might be a lot better...
> >
> > and worse too .
> > Things are now a lot better than before ,IMMO .
> >
>
> it should be.
>

It is .
-- 
luigi

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