diff options
| -rw-r--r-- | guix/build/utils.scm | 15 | ||||
| -rw-r--r-- | tests/build-utils.scm | 12 |
2 files changed, 15 insertions, 12 deletions
diff --git a/guix/build/utils.scm b/guix/build/utils.scm index 2352a627e9..8e630ad586 100644 --- a/guix/build/utils.scm +++ b/guix/build/utils.scm @@ -9,6 +9,7 @@ ;;; Copyright © 2020, 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com> ;;; Copyright © 2021, 2022 Maxime Devos <maximedevos@telenet.be> ;;; Copyright © 2021 Brendan Tildesley <mail@brendan.scot> +;;; Copyright © 2023 Carlo Zancanaro <carlo@zancanaro.id.au> ;;; ;;; This file is part of GNU Guix. ;;; @@ -729,18 +730,22 @@ effects, such as displaying warnings or error messages." (define* (alist-cons-before reference key value alist #:optional (key=? equal?)) "Insert the KEY/VALUE pair before the first occurrence of a pair whose key -is REFERENCE in ALIST. Use KEY=? to compare keys." +is REFERENCE in ALIST. Use KEY=? to compare keys. An error is raised when no +such pair exists." (let-values (((before after) (break (match-lambda ((k . _) (key=? k reference))) alist))) - (append before (alist-cons key value after)))) + (match after + ((_ _ ...) + (append before (alist-cons key value after)))))) (define* (alist-cons-after reference key value alist #:optional (key=? equal?)) "Insert the KEY/VALUE pair after the first occurrence of a pair whose key -is REFERENCE in ALIST. Use KEY=? to compare keys." +is REFERENCE in ALIST. Use KEY=? to compare keys. An error is raised when +no such pair exists." (let-values (((before after) (break (match-lambda ((k . _) @@ -748,9 +753,7 @@ is REFERENCE in ALIST. Use KEY=? to compare keys." alist))) (match after ((reference after ...) - (append before (cons* reference `(,key . ,value) after))) - (() - (append before `((,key . ,value))))))) + (append before (cons* reference `(,key . ,value) after)))))) (define* (alist-replace key value alist #:optional (key=? equal?)) "Replace the first pair in ALIST whose car is KEY with the KEY/VALUE pair. diff --git a/tests/build-utils.scm b/tests/build-utils.scm index 7f4f12ccc7..3babf5d544 100644 --- a/tests/build-utils.scm +++ b/tests/build-utils.scm @@ -41,17 +41,17 @@ '((a . 1) (x . 42) (b . 2) (c . 3)) (alist-cons-before 'b 'x 42 '((a . 1) (b . 2) (c . 3)))) -(test-equal "alist-cons-before, reference not found" - '((a . 1) (b . 2) (c . 3) (x . 42)) - (alist-cons-before 'z 'x 42 '((a . 1) (b . 2) (c . 3)))) +(test-assert "alist-cons-before, reference not found" + (not (false-if-exception + (alist-cons-before 'z 'x 42 '((a . 1) (b . 2) (c . 3)))))) (test-equal "alist-cons-after" '((a . 1) (b . 2) (x . 42) (c . 3)) (alist-cons-after 'b 'x 42 '((a . 1) (b . 2) (c . 3)))) -(test-equal "alist-cons-after, reference not found" - '((a . 1) (b . 2) (c . 3) (x . 42)) - (alist-cons-after 'z 'x 42 '((a . 1) (b . 2) (c . 3)))) +(test-assert "alist-cons-after, reference not found" + (not (false-if-exception + (alist-cons-after 'z 'x 42 '((a . 1) (b . 2) (c . 3)))))) (test-equal "alist-replace" '((a . 1) (b . 77) (c . 3)) |