From: "Михаил Бахтерев" <mob@k.imm.uran.ru>
To: guile-user@gnu.org
Subject: Is it possible to expand syntax inside match?
Date: Sun, 24 Oct 2021 11:49:02 +0500 [thread overview]
Message-ID: <YXT/qI6FDv17VqWM@z> (raw)
Greetings!
I wondering, if is it possible to implement something like
this?
(define-syntax R (syntax-rules () ((_ r v l) #(red r v l))))
(define-syntax B (syntax-rules () ((_ r v l) #(black r v l))))
(define red-black-set-balance
(match-lambda
((or (B (R (R a x b) y c) z d)
(B (R a x (R b y c)) z d)
(B a x (R (R b y c) z d))
(B a x (R b y (R c z d)))) (R (B a x b) y (B c z d)))
(node node)))
The idea is to have some automation allowing not to write
patterns manually:
#('black #('red #('red a x b) y c) z d)
- Mikhail Bakhterev, respectfully.
next reply other threads:[~2021-10-24 6:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-24 6:49 Михаил Бахтерев [this message]
2021-10-24 19:48 ` Is it possible to expand syntax inside match? Maxime Devos
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