[parenscript-devel] Bug: string literals don't self-evaluate in js macros

[Vladimir Sedach]

Chalk it up to my ignorance, but really that should be a bug in
symbol-macrolet. I intended it to be like CL. However, I do agree with
you that the current semantics seem to be better in that they are more
consistent with how other types of macros work (at least it seems that
way to me, which is why I implemented it this way). I say let's leave
it until we start getting complaints.

Vladimir

On 7/28/07, Red Daly <reddaly at stanford.edu> wrote:
> Thanks for the bug report.  A fix is in the darcs repository.
>
> I also created a and also added a define-script-symbol-macro macro for
> top-level symbol macros.
>
> However, upon some inspection it appears that Parenscript symbol macros
> work differently from Lisp symbol macros.
>
> Consider the form (SYMBOL-MACROLET ({name macro-body}*) body).  Lisp
> symbol macros expand not to the result of evaluating MACRO-BODY, but to
> MACRO-BODY itself:
>
> (symbol-macrolet ((lisp-sym `(print "hello")))
>     lisp-sym)
> => (PRINT "hello")
>
> Parenscript macros expand to the the evaluation of MACRO-BODY:
>
> (script
>
>     (symbol-macrolet ((paren-sym `(print "hello")))
>         paren-sym))
> => "javascript_print('hello');"
>
> I prefer the Parenscript semantics, so we probably do not need to change
> anything.  If anyone has other thoughts, let me know.
>
> Red
>
> Daniel Gackle wrote:
> > A js macro that evaluates to a string literal can't be used:
> >
> >   (defjsmacro blah () "abc")
> >   (js (blah)) =>
> >      "null;"
> >
> > This seems wrong. For one thing, other literals work fine:
> >
> >   (defjsmacro blah () 123)
> >   (js (blah)) =>
> >      "123"
> >
> > For another, Lisp behaves differently:
> >
> >   (defmacro blah () "abc")
> >   (blah) =>
> >       "abc"
> >
> > Dan
> >
> > p.s. Actually, I'd rather use a symbol macro but it appears there is
> > no define-symbol-macro in Parenscript and in this case symbol-macrolet
> > is not convenient.
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> >
>
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