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Universal sorting of markers.

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This commit is contained in:
Dominik Pantůček 2023-05-19 21:15:56 +02:00
parent 0265dc3617
commit c9ba551132
2 changed files with 15 additions and 1 deletions
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14
src/cal-day.scm
View file

@ -48,6 +48,8 @@
cal-day>=?
cal-day>?
cal-day/month<?
cal-day-tests!
)
@ -191,6 +193,18 @@
(define (cal-day>? a b)
(not (cal-day<=? a b)))
;; Universal sorting comparator
(define (cal-day/month<? a b)
(if (and (cal-day? a)
(cal-day? b))
(cal-day<? a b)
(if (and (cal-month? a)
(cal-month? b))
(cal-month<? a b)
(error 'cal-day/month<?
"Requires two arguments of the same type"
(list a b)))))
;; Module self-tests
(define (cal-day-tests!)
(run-tests

2
src/cal-period.scm
View file

@ -130,7 +130,7 @@
(define (sort-period-markers l)
(sort l
(lambda (a b)
(cal-month<? (cadr a) (cadr b)))))
(cal-day/month<? (cadr a) (cadr b)))))
;; Converts list of start/stop markers to list of pairs of months -
;; periods. The markers are lists in the form (start/stop cal-month).