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even string-cursor->index/index->cursor are polymorphic

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This commit is contained in:
Alex Shinn 2020-07-03 09:43:26 +09:00
parent 89a5b97e3c
commit e3fddebb26
2 changed files with 22 additions and 3 deletions
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12
lib/srfi/130.sld
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@ -42,6 +42,8 @@
(import (scheme base)
(scheme char) (scheme write)
(rename (chibi string)
(string-index->cursor %string-index->cursor)
(string-cursor->index %string-cursor->index)
(string-cursor-next %string-cursor-next)
(string-cursor-prev %string-cursor-prev)
(string-fold %string-fold)
@ -58,5 +60,13 @@
(define (string-cursor-prev str cursor)
(if (string-cursor? cursor)
(%string-cursor-prev str cursor)
(- cursor 1))))
(- cursor 1)))
(define (string-index->cursor str i)
(if (string-cursor? i)
i
(%string-index->cursor str i)))
(define (string-cursor->index str cursor)
(if (string-cursor? cursor)
(%string-cursor->index str cursor)
cursor)))
(include "130.scm"))

13
lib/srfi/130/test.sld
View file

@ -160,9 +160,9 @@
(test-assert "string-contains"
(string-contains s "mer" 1 8))
(test-not "string-contains"
(string-contains s "mer" 4 8))
(string-contains s "mer" 4 8))
(test-not "string-contains"
(string-contains s "mer" 1 5)))
(string-contains s "mer" 1 5)))
(let ((s "eek -- it's a geek."))
(test 15 (string-cursor->index s (string-contains-right s "ee")))
(test 15 (string-cursor->index s (string-contains-right s "ee" 12 18)))
@ -385,4 +385,13 @@
(test "string-contains" 0
(string-cursor->index "ab" (string-contains "ab" "ab")))
;; even string-cursor->index/index->cursor are polymorphic :(
(let* ((s "abc")
(i 1)
(sc (string-index->cursor s i)))
(test i (string-cursor->index s sc))
(test i (string-cursor->index s i))
(test sc (string-index->cursor s sc))
(test sc (string-index->cursor s i)))
(test-end))))