I second the idea that the documentation could be clearer on the difference
between "#lang scribble/base" and friends and what can be done with the
at-reader in general, as shown in languages like "scribble/text" and
"scribble/html". Despite having used both "scribble/base"-family languages
and tools like "make-at-readtable", I didn't realize until reading this
thread that "scribble/text" may be a better basis for several things I've
been trying to do.
On a related note, make-at-readtable accepts options for
"#:command-readtable" and "#:datum-readtable", but not for reading the body
of the @-form — though as I think about it, I guess that could be done
using "#:syntax-post-processor", right?
I'm still not 100% clear on what is supposed to happen at read-time vs.
expand-time vs. runtime in this example:
(filter foo?
(python-ish-list-comprehend
«thing for x in sqlish(«select * from foo») where some_pred(x)»))
but I think those options might be able to construct something closer to
the udelim goal than plain at-epressions.
On Sun, Sep 25, 2016 at 3:50 PM Dupéron Georges <jahvascriptman...@gmail.com>
wrote:
> If I understand you well, the intended use of your nested delimiters can
> be more or less described as syntactic sugar for #reader, with
> auto-detection of where the string ends:
>
> (filter foo?
> (python-ish-list-comprehend
> «thing for x in sqlish(«select * from foo») where some_pred(x)»))
>
> could be rewritten as:
>
> (filter foo?
> #reader"python-ish-list-comprehend.rkt" thing for x in
> #reader"sqlish.rkt" select * from foo<READER 2 STOPS HERE> where
> some_pred(x)<READER 1 STOPS HERE>
>
> --
> Georges
>
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