Re: Having trouble understanding optional and variable amount of arguments

[David Kastrup]

Thomas Morley <address@hidden> writes:

> 2018-03-08 17:29 GMT+01:00 David Kastrup <address@hidden>:
>> Stefano Troncaro <address@hidden> writes:
>>
>>> @David
>>> Thank you. The define-syntax and syntax-rules thing looked easier to
>>> understand at first glance so I tried to use that. I'll experiment with
>>> macros then.
>>
>> If we want to get rid of those problems: Guile-1.8 is no longer
>> officially maintained.  I think someone forked it for his own purposes.
>> We might want to cooperate with him regarding some official place where
>> one can fix those bugs.
>
> I've tested with my guilev2-lilypond.:
>
> \version "2.21.0"
>
> #(define-syntax test
>    (syntax-rules ()
>      ((test conditional true false)
>       (if conditional
>           true
>           false))))
>
> #(test #t (display "I'm true!\n") (display "I'm false!\n"))
>
> Works out of the box, no need for (use-syntax (ice-9 syncase)).
> `use-syntax' gives an error now. Obviously it's dropped from guilev2.

Sure, it's been part of Scheme standards for quite a while now.

-- 
David Kastrup