On Thu, May 28, 2015 at 1:53 AM, John Cowan <co...@mercury.ccil.org> wrote:
> Jinsong Liang scripsit:
>
>> Then is there a straightforward way to get a list of booleans "or"ed? I
>> tried "fold" with "or" but it does not work either. It seems writing a loop
>> or a recursion for this is a little overkill.
>
> You want "any".
Or you can write down your own apply which applies to macros:
(define-macro apply-syntax
(lambda (macro args)
`(,macro ,@args)))
(define-syntax apply-syntax
(syntax-rules ()
((_ macro (args ...)) (macro args ...))))
(apply-syntax or (#f (+ 1 2) (print "hello")))
=> 3
Regards,
Michele
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