From: swedebugia <swedebugia@riseup.net>
To: guix-devel <guix-devel@gnu.org>
Subject: Help with match
Date: Thu, 9 May 2019 12:04:38 +0200 [thread overview]
Message-ID: <0e685f33-9404-1a4a-25c8-45e34cb21a58@riseup.net> (raw)
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Hi
I am almost finished with the quicklisp importer but I'm stuck with not
being able to match what I want with the pattern matcher.
I (still) don't understand the documentation for this matcher and I
can't get it to do what I want it seems :/
--
Cheers Swedebugia
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scheme@(guile-user) [8]> (let ((l '(asd-record (license-line (text-until-dq MIT)) (synopsis-line (text-until-dq An async HTTP client)) dependencies (dependencies (text alexandria)) (dependencies (text babel)) (dependencies (text fast-io)) (dependencies (text cl-async)) (dependencies (text blackbird)) (dependencies (text quri)) (dependencies (text fast-http)) (dependencies (text fast-io)) (dependencies (text cl-async-ssl)) (dependencies (text cl-cookie)) (dependencies (text file)))))
(match l ;; <- the input object
(('asd-record (who (_ val)) ...) ;; <- the pattern
who))) ;; <- the expression evaluated upon matching
<unnamed port>:170:23: Throw to key `match-error' with args `("match" "no matching pattern" (asd-record (license-line (text-until-dq MIT)) (synopsis-line (text-until-dq An async HTTP client)) dependencies (dependencies (text alexandria)) (dependencies (text babel)) (dependencies (text fast-io)) (dependencies (text cl-async)) (dependencies (text blackbird)) (dependencies (text quri)) (dependencies (text fast-http)) (dependencies (text fast-io)) (dependencies (text cl-async-ssl)) (dependencies (text cl-cookie)) (dependencies (text file))))'.
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [9]> (let ((l '(asd-record (license-line (text-until-dq MIT)))))
(match l ;; <- the input object
(('asd-record (who (_ val)) ...) ;; <- the pattern
who))) ;; <- the expression evaluated upon matching
$5 = (license-line)
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next reply other threads:[~2019-05-10 9:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-09 10:04 swedebugia [this message]
2019-05-10 13:53 ` Help with match Timothy Sample
2019-05-10 15:44 ` swedebugia
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