[wg-camlp4] Meta Programming from the view of the implementaion

[Hongbo Zhang]

On Thu, Jan 31, 2013 at 8:43 AM, Török Edwin <edwin+ml-ocaml at etorok.net>wrote:

> On 01/31/2013 03:27 PM, Hongbo Zhang wrote:
> >
> >
> >     > In Fan,
> >     > {:json| ... |}
> >     > if "|}" is used inside,*the user (optionally) can introduce a new
> separator following "|" immediately*
> >     > {:json|/ ... /|}
> >
> >     So this would be similar to Leo's proposal but with the optional
> symbol on the inside, a mandatory whitespace
> >     after the symbol, and no whitespace after the : right?
> >     {:lid|x␣string x|}
> >
> > no whitespace, we need the *precise location*, whitespace will introduce
> trouble here
> > The optional *character set is limited to [/+-] (serveral more)*, only
> those optional characters will be recgonized.
> > so you can still write {:json|{a;b}|}
> > but {:json|/{a;b|}}/|} also works
>
> Without a whitespace how do you know if the '/' is your optional character
> or part of the quoted syntax?
> (unless you restrict the quoted syntax's first character to be something
> else than the optional characters)
>
> exactly( optional chars is a limited set, but is enough in
practice,(stolen from perl)

> What do you think of this syntax:
> {:lid|...|lid:}
>
> no, we introduce Language namespace, sometimes you can write unamed
quotations XD

> Its still quite easy to find where quotation's bounds are, it is
> symmetric, and the end marker should be long enough
> to not cause false matches inside the quotation.
>
> Best regards,
> --Edwin
>



-- 
-- Regards, Hongbo
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