Hi Tassilo,
2013/11/5 Tassilo Horn <t...@gnu.org>:
> 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"))))
>
Thank you, this was driving me crazy!
> It seems your coffee reservoirs are nearly empty. ;-)
>
Probably you're right :-)
Bye,
Mosè
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