Re: defmacro* usage

[Thierry Volpiatto]

Stefan Monnier <address@hidden> writes:

>> I have an error with following recipe:
>
>> #+BEGIN_SRC lisp
>> (defmacro* test1 (&key (lang 'french))
>>   `(case ,lang
>>      (french (message "Bonjour"))
>>      (english (message "Hello"))))
> [...]
>> As you can see, the quoted default argument 'french cause an error with
>> the defmacro* and work fine with the defun*.
>
> The error is not from defmacro* but from the code you generated using 
> defmacro*.
>
>> Is it a bug or i misunderstand something?
>
> A misunderstanding.  Think harder about what your macro does.  E.g. try
> (macroexpand '(test1 :lang 'toto)) and (macroexpand '(test1)).
> During macroexpansion, your `lang' is not supposed to hold a "language
> value" but "a Lisp expression that will evaluate to a language value".
Ok, thanks for explanation.

-- 
  Thierry
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