From 04fd96cac33fa7557e574e54575252564ba27111 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Sun, 14 Apr 2013 16:56:08 +0200 Subject: utils: Add `fold2'. * gnu/packages.scm (fold2): Remove. * guix/utils.scm (fold2): New procedure. Generalization of the above to one and two lists. * tests/utils.scm ("fold2, 1 list", "fold2, 2 lists"): New tests. --- tests/utils.scm | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'tests/utils.scm') diff --git a/tests/utils.scm b/tests/utils.scm index bcdd120a74..fa7d7b03fd 100644 --- a/tests/utils.scm +++ b/tests/utils.scm @@ -64,6 +64,31 @@ ("nixpkgs" "1.0pre22125_a28fe19") ("gtk2" "2.38.0")))) +(test-equal "fold2, 1 list" + (list (reverse (iota 5)) + (map - (reverse (iota 5)))) + (call-with-values + (lambda () + (fold2 (lambda (i r1 r2) + (values (cons i r1) + (cons (- i) r2))) + '() '() + (iota 5))) + list)) + +(test-equal "fold2, 2 lists" + (list (reverse '((a . 0) (b . 1) (c . 2) (d . 3))) + (reverse '((a . 0) (b . -1) (c . -2) (d . -3)))) + (call-with-values + (lambda () + (fold2 (lambda (k v r1 r2) + (values (alist-cons k v r1) + (alist-cons k (- v) r2))) + '() '() + '(a b c d) + '(0 1 2 3))) + list)) + (test-assert "define-record-type*" (begin (define-record-type* foo make-foo -- cgit 1.4.1