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combinators: Recurse fold2 to named let loop.

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* guix/combinators.scm (fold2): Recurse to named let loop, not fold2 itself.

Signed-off-by: Jakub Kądziołka <kuba@kadziolka.net>
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Arun Isaac 2020-06-01 05:41:13 +05:30 committed by Jakub Kądziołka
parent fabfe0b99c
commit 7a99c58c45
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1 changed files with 2 additions and 1 deletions
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guix/combinators.scm
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@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2020 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of GNU Guix.
;;;
@ -56,7 +57,7 @@ (define fold2
(call-with-values
(lambda () (proc (car lst1) (car lst2) result1 result2))
(lambda (result1 result2)
(fold2 proc result1 result2 (cdr lst1) (cdr lst2)))))))))
(loop result1 result2 (cdr lst1) (cdr lst2)))))))))
(define (fold-tree proc init children roots)
"Call (PROC NODE RESULT) for each node in the tree that is reachable from