From patchwork Sat Dec 21 17:04:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Herman Rimm X-Patchwork-Id: 35116 Return-Path: X-Original-To: patchwork@mira.cbaines.net Delivered-To: patchwork@mira.cbaines.net Received: by mira.cbaines.net (Postfix, from userid 113) id 8363127BBEA; Sat, 21 Dec 2024 17:06:49 +0000 (GMT) X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on mira.cbaines.net X-Spam-Level: X-Spam-Status: No, score=-6.4 required=5.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_BLOCKED, RCVD_IN_VALIDITY_CERTIFIED,RCVD_IN_VALIDITY_RPBL,RCVD_IN_VALIDITY_SAFE, SPF_HELO_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.6 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mira.cbaines.net (Postfix) with ESMTPS id 48AEF27BBE2 for ; Sat, 21 Dec 2024 17:06:49 +0000 (GMT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tP2vZ-0005Rh-8H; Sat, 21 Dec 2024 12:06:09 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tP2vY-0005RT-Lf for guix-patches@gnu.org; Sat, 21 Dec 2024 12:06:08 -0500 Received: from debbugs.gnu.org ([2001:470:142:5::43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1tP2vY-0003QQ-1D; Sat, 21 Dec 2024 12:06:08 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debbugs.gnu.org; s=debbugs-gnu-org; h=MIME-Version:References:In-Reply-To:Date:From:To:Subject; bh=XBnWVgPt+dXrwelp+ecr17pGs1zoO5nRvpNKyO4JC0o=; b=ZXrEkrz8xfHLNHWt8zgKfO6azqMQNnK16zt5o93VTZ0u807NAwc6k9BvnFt/a21lwUjgBZs0pFw+NpIY37LSIyDkufqkJg5/f6NxKx2IB/dGx50H79qYHxG4JefSFzcjVuPkMKbOZPV9tjepucg+HJnTBPiYh/FBV9kNWnb0EjnXuA3gqPE+j/UOX/JfiEvP6zenW3X5DRY5P+gnLWEgwLQp6TcwENXWIIfA+h+QRTjxD7OSXn75PZ9SgMkUYiNnqGr5KLcgr2wsowvYxHFM1lhQNdXGgDAfyn9F2YxSsPpdqK+1RoIEYEsSze0zjCMQyhSVeweyvI6rNYptOVnUqg==; Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1tP2vS-0005Qz-Ir; Sat, 21 Dec 2024 12:06:02 -0500 X-Loop: help-debbugs@gnu.org Subject: [bug#75010] [PATCH 1/7] monads: Add 'mmatch'. Resent-From: Herman Rimm Original-Sender: "Debbugs-submit" Resent-CC: guix@cbaines.net, dev@jpoiret.xyz, ludo@gnu.org, othacehe@gnu.org, maxim.cournoyer@gmail.com, zimon.toutoune@gmail.com, me@tobias.gr, guix-patches@gnu.org Resent-Date: Sat, 21 Dec 2024 17:06:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 75010 X-GNU-PR-Package: guix-patches X-GNU-PR-Keywords: patch To: 75010@debbugs.gnu.org Cc: Christopher Baines , Josselin Poiret , Ludovic =?utf-8?q?Court=C3=A8s?= , Mathieu Othacehe , Maxim Cournoyer , Simon Tournier , Tobias Geerinckx-Rice X-Debbugs-Original-Xcc: Christopher Baines , Josselin Poiret , Ludovic =?utf-8?q?Court=C3=A8s?= , Mathieu Othacehe , Maxim Cournoyer , Simon Tournier , Tobias Geerinckx-Rice Received: via spool by 75010-submit@debbugs.gnu.org id=B75010.173480070920659 (code B ref 75010); Sat, 21 Dec 2024 17:06:02 +0000 Received: (at 75010) by debbugs.gnu.org; 21 Dec 2024 17:05:09 +0000 Received: from localhost ([127.0.0.1]:47509 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tP2ua-0005Mj-MS for submit@debbugs.gnu.org; Sat, 21 Dec 2024 12:05:09 -0500 Received: from 81-205-150-117.fixed.kpn.net ([81.205.150.117]:38121 helo=email.rimm.ee) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1tP2uY-0005I2-Bd for 75010@debbugs.gnu.org; Sat, 21 Dec 2024 12:05:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rimm.ee; s=herman; t=1734800696; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XBnWVgPt+dXrwelp+ecr17pGs1zoO5nRvpNKyO4JC0o=; b=DH+pAVrZ7HAbYWtDndS5FRIBPhlzp4nq1BrN5dF1r2SNXjqRarAWh5aL+JZJ7MIgeDcYgS lSGTnIst7QBmb1RG1Lb1gXBcCnhngUTRKQ7p3PMczg28QOXEI5ysYzmJp8//39cps4CSbH cE2Zet2ONQW6chpTElZ73HTv1A566ymHteGmred+/a/iDgRL9LFs6DzSxAzumeeeBnWfBw hFimLDdtOjSRh9TQ6n+NZbAd7t4DoOKouqnBKj74U+SYlbA6pAUn3U0u7BNlm7Gy2gnn/Q TL8AxRJwCfu1aV8fb2arF3eTfs6zMJGaPJapWe+diaIE8SOQXtjptIfOiNL3pg== Received: by 81-205-150-117.fixed.kpn.net (OpenSMTPD) with ESMTPSA id 32d18722 (TLSv1.3:TLS_CHACHA20_POLY1305_SHA256:256:NO) for <75010@debbugs.gnu.org>; Sat, 21 Dec 2024 17:04:56 +0000 (UTC) Date: Sat, 21 Dec 2024 18:04:05 +0100 Message-ID: <4bfa279cae2316d7a7a4e0640d13a0763ad86f92.1734798943.git.herman@rimm.ee> X-Mailer: git-send-email 2.45.2 In-Reply-To: References: MIME-Version: 1.0 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: , Reply-to: Herman Rimm X-ACL-Warn: , Herman Rimm via Guix-patches X-Patchwork-Original-From: Herman Rimm via Guix-patches via From: Herman Rimm Errors-To: guix-patches-bounces+patchwork=mira.cbaines.net@gnu.org Sender: guix-patches-bounces+patchwork=mira.cbaines.net@gnu.org X-getmail-retrieved-from-mailbox: Patches * doc/guix.texi (The Store Monad): Document mmatch. * guix/monads.scm (mmatch): Add macro. Change-Id: I558f8e025f6cf788c9fc475e99d49690d7a98f41 --- doc/guix.texi | 6 ++++++ guix/monads.scm | 11 +++++++++++ 2 files changed, 17 insertions(+) diff --git a/doc/guix.texi b/doc/guix.texi index f7b7569887..c86f644360 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -11814,6 +11814,12 @@ The Store Monad (@pxref{Local Bindings,,, guile, GNU Guile Reference Manual}). @end defmac +@defmac mmatch monad mexp (pattern body) @dots{} +Match monadic object @var{mexp} against clause @var{pattern}s, in the +order in which they appear. The last expression of each clause +@var{body} must be a monadic expression. +@end defmac + @defmac mbegin monad mexp @dots{} Bind @var{mexp} and the following monadic expressions in sequence, returning the result of the last expression. Every expression in the diff --git a/guix/monads.scm b/guix/monads.scm index 0bd8ac9315..0e8ca868ce 100644 --- a/guix/monads.scm +++ b/guix/monads.scm @@ -1,5 +1,6 @@ ;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2013, 2014, 2015, 2017, 2022 Ludovic Courtès +;;; Copyright © 2024 Herman Rimm ;;; ;;; This file is part of GNU Guix. ;;; @@ -37,6 +38,7 @@ (define-module (guix monads) with-monad mlet mlet* + mmatch mbegin mwhen munless @@ -355,6 +357,15 @@ (define-syntax mlet (let ((var temp) ...) body ...))))))) +(define-syntax mmatch + (syntax-rules () + "Match the monadic object MEXP against the patterns of CLAUSES ... +in the order in which they appear. The last expression of each clause +body must be a monadic expression." + ((_ monad mexp clauses ...) + (with-monad monad + (>>= mexp (match-lambda clauses ...)))))) + (define-syntax mbegin (syntax-rules (%current-monad) "Bind MEXP and the following monadic expressions in sequence, returning