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[89.132.245.188]) by smtp.gmail.com with ESMTPSA id bm23-20020a170906c05700b006d597fd51c6sm9581912ejb.145.2022.03.31.05.54.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 31 Mar 2022 05:54:34 -0700 (PDT) From: Attila Lendvai Date: Thu, 31 Mar 2022 14:52:31 +0200 Message-Id: <20220331125230.4388-2-attila@lendvai.name> X-Mailer: git-send-email 2.34.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: guix-patches@gnu.org List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-patches-bounces+larch=yhetil.org@gnu.org Sender: "Guix-patches" X-Migadu-Flow: FLOW_IN X-Migadu-To: larch@yhetil.org X-Migadu-Country: US ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1648731309; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding:resent-cc: resent-from:resent-sender:resent-message-id:in-reply-to:in-reply-to: references:references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:dkim-signature; bh=Mg1NnyEMbF0Qpd/WMY0lgAk90fwyWJ/nVdVU5N62754=; b=tPGFtOcll5KUIIHD8les2kMo122CtnW1USOZeUe2Awz73h0kKwpSmiCtu4IpGFPzJmuyOZ ZzguUjOBcbrxZKU6CUZk84Wt4aY2Z50rTWTd7k4LVcKW1TyPx9z9G7JvoDSUALTwnRCr+Q wjYp96SrmoQdyGoEq/xB5CIJz/WDDMMAWqJ62xOIpgBVcPVXGWzMF6XZZITuq5Arp8Myzk 4065OaUyjATErPoAL3jsHefEQBx1qYceAxzYclCanRKwXB1b5lAXNgrjfwX3PcD7U4qA8y fc6YYAL+yCOjLUxWa0bwCX3Woh5GE4FaHpLOY4GaHp3w5SnEqKkjQ1qFi/tC5Q== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1648731309; a=rsa-sha256; cv=none; b=HIaHEgTVOWRNbjkV0AWqKKGTZDTRDXGpSSPc8y2EBozEWJbyzvsRANs2/JhyEjPJ3xWMDT w2/yVUD3kDe4IPwTHGGY32NbZUSdG4mBaQHKHc/HZamx7yC0KcY2RPFpsJQFqkkfuQEdoL 7rH4802Xi/YQUW2ZRl/8ee6Zj+kpbUJuWBESLVLVM0itDkQ3E0F5gXbGMLvMJjk1X6L2Wa E28pnxZuUoyFN5R27S/0R1K91KmpIezKot9WBuE2ipYr+rogSxFHhEp9k8D0q0qI3hSx3+ 0Wqw5F3GDIc2ld5jE29fYL+Nf6LOgISO7qcNz3f/RApxdFoxlEoHIKoLThrp+w== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b=pIZTMS6V; dmarc=none; spf=pass (aspmx1.migadu.com: domain of "guix-patches-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-patches-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: 2.43 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b=pIZTMS6V; dmarc=none; spf=pass (aspmx1.migadu.com: domain of "guix-patches-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-patches-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 9223431D3C X-Spam-Score: 2.43 X-Migadu-Scanner: scn1.migadu.com X-TUID: Rdh74HGVJDwZ E.g. (match-record obj (field1 (field2 var-name)) ...) * guix/records.scm (match-record/fields): Implement it. --- a real world example i was facing: a field name is the same as an object constructor, and thus shadows it in a match-record form, unless a different variable name is chosen. guix/records.scm | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/guix/records.scm b/guix/records.scm index e311086d73..492ab2aed6 100644 --- a/guix/records.scm +++ b/guix/records.scm @@ -537,12 +537,15 @@ (define (recutils->alist port) (define-syntax match-record/fields (syntax-rules () - ((_ record type (field fields ...) body ...) - (let ((field ((record-accessor type 'field) record))) + ((_ record type ((field-name variable-name) fields ...) body ...) + (let ((variable-name ((record-accessor type 'field-name) record))) ;; TODO compute indices and report wrong-field-name errors at ;; expansion time ;; TODO support thunked and delayed fields (match-record/fields record type (fields ...) body ...))) + ((_ record type (field fields ...) body ...) + ;; Channel it back into the canonical form above. + (match-record/fields record type ((field field) fields ...) body ...)) ((_ record type () body ...) (begin body ...)))) -- 2.34.0