* bug in field-string and field-string-no-properties
@ 2003-08-14 21:00 Greg Hill
2003-08-14 21:21 ` John Paul Wallington
0 siblings, 1 reply; 2+ messages in thread
From: Greg Hill @ 2003-08-14 21:00 UTC (permalink / raw)
There appears to be a bug in field-string and
field-string-no-properties. When (point) or the POS argument is at
the first character of a field, the function returns an empty string.
The following fragment of code, executed in the scratch buffer,
illustrates the problem.
(progn
(set-buffer (get-buffer-create "junk"))
(erase-buffer)
(insert "Test")
(put-text-property (point-min) (point-max) 'field 1)
(message "field-string at 1 = '%s'\nfield-string at 2 = '%s'"
(field-string-no-properties 1) (field-string-no-properties 2)))
platform: GNU Emacs 21.2.2 (sparc-sun-solaris2.7, X toolkit)
--Greg
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: bug in field-string and field-string-no-properties
2003-08-14 21:00 bug in field-string and field-string-no-properties Greg Hill
@ 2003-08-14 21:21 ` John Paul Wallington
0 siblings, 0 replies; 2+ messages in thread
From: John Paul Wallington @ 2003-08-14 21:21 UTC (permalink / raw)
Cc: bug-gnu-emacs
> There appears to be a bug in field-string and
> field-string-no-properties. When (point) or the POS argument is at
> the first character of a field, the function returns an empty string.
> The following fragment of code, executed in the scratch buffer,
> illustrates the problem.
>
> (progn
> (set-buffer (get-buffer-create "junk"))
> (erase-buffer)
> (insert "Test")
> (put-text-property (point-min) (point-max) 'field 1)
> (message "field-string at 1 = '%s'\nfield-string at 2 = '%s'"
> (field-string-no-properties 1) (field-string-no-properties 2)))
>From (elisp) Fields Info node:
"When the characters before and after POS are part of the same field,
there is no doubt which field contains POS: the one those characters
both belong to. When POS is at a boundary between fields, which field
it belongs to depends on the stickiness of the `field' properties of
the two surrounding characters (see *note Sticky Properties::). The field
whose property would be inherited by text inserted at POS is the field
that contains POS."
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2003-08-14 21:00 bug in field-string and field-string-no-properties Greg Hill
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