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Diffstat (limited to 'module/datetime/util.scm')
| -rw-r--r-- | module/datetime/util.scm | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/module/datetime/util.scm b/module/datetime/util.scm index 5ba06da4..3ae270bd 100644 --- a/module/datetime/util.scm +++ b/module/datetime/util.scm @@ -103,7 +103,10 @@ (define*-public (week-day-name week-day-number optional: truncate-to) ;; NOTE this allows days larger than 7 (sunday if counting from monday). - (let ((str (locale-day (modulo (1+ week-day-number) 7)))) + (let ((str (catch 'out-of-range + (lambda () (locale-day (1+ (modulo week-day-number 7)))) + (lambda (oor str num) (scm-error 'out-of-range 'week-day-name "~a == (~a % 7) + 1" + (list num week-day-number) (list week-day-number)))))) ;; I also know about the @var{locale-day-short} method, but I need ;; strings of length 2. (if truncate-to |