Mosè Giordano <giordano.m...@libero.it> writes:
Hi Mosè,
> I'm having a hard time understanding why this code
>
> (let ((foo '(("foo") ("bar"))))
> (TeX-parse-argument t '(TeX-read-key-val foo)))
>
> works but this
>
> (TeX-parse-argument t '(TeX-read-key-val '(("foo") ("bar"))))
>
> doesn't, resulting in a wrong-type-argument error. In the outer
> `cond` of `TeX-parse-argument', both codes enter the `(listp arg)'
> branch and in the next `cond' they enter then the `(symbolp head)'
> branch, but the two codes run differently if the CDR of `arg' is a
> symbol or a lisp expression. Why?
In the first call, arg is (TeX-read-key-val foo), which is interpreted
as a funcall of the CAR to the symbol value of the CDR.
In the second call, arg is (TeX-read-key-val (quote (("foo") ("bar")))).
Note that the list is quoted! To make both calls equivalent, don't
double-quote:
(TeX-parse-argument t '(TeX-read-key-val (("foo") ("bar"))))
It seems your coffee reservoirs are nearly empty. ;-)
Bye,
Tassilo
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