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Deletion means removing part of the text in a buffer, without saving it in the kill ring (voir la section The Kill Ring). Deleted text can't be yanked, but can be reinserted using the undo mechanism (voir la section Undo). Some deletion functions do save text in the kill ring in some special cases.
All of the deletion functions operate on the current buffer.
This function deletes the entire text of the current buffer (not just
the accessible portion), leaving it empty. If the buffer is read-only, it
signals a buffer-read-only error; if some of the text in it is
read-only, it signals a text-read-only error. Otherwise, it deletes
the text without asking for any confirmation. It returns nil.
Normally, deleting a large amount of text from a buffer inhibits further
auto-saving of that buffer “because it has shrunk.” However,
erase-buffer does not do this, the idea being that the future text is
not really related to the former text, and its size should not be compared
with that of the former text.
This command deletes the text between positions start and end in
the current buffer, and returns nil. If point was inside the deleted
region, its value afterward is start. Otherwise, point relocates with
the surrounding text, as markers do.
This function deletes the text between positions start and end in the current buffer, and returns a string containing the text just deleted.
If point was inside the deleted region, its value afterward is start. Otherwise, point relocates with the surrounding text, as markers do.
This command deletes count characters directly after point, or before
point if count is negative. If killp is non-nil, then it
saves the deleted characters in the kill ring.
In an interactive call, count is the numeric prefix argument, and killp is the unprocessed prefix argument. Therefore, if a prefix argument is supplied, the text is saved in the kill ring. If no prefix argument is supplied, then one character is deleted, but not saved in the kill ring.
The value returned is always nil.
This command deletes count characters directly before point, or after
point if count is negative. If killp is non-nil, then it
saves the deleted characters in the kill ring.
In an interactive call, count is the numeric prefix argument, and killp is the unprocessed prefix argument. Therefore, if a prefix argument is supplied, the text is saved in the kill ring. If no prefix argument is supplied, then one character is deleted, but not saved in the kill ring.
The value returned is always nil.
This command deletes count characters backward, changing tabs into
spaces. When the next character to be deleted is a tab, it is first
replaced with the proper number of spaces to preserve alignment and then one
of those spaces is deleted instead of the tab. If killp is
non-nil, then the command saves the deleted characters in the kill
ring.
Conversion of tabs to spaces happens only if count is positive. If it is negative, exactly -count characters after point are deleted.
In an interactive call, count is the numeric prefix argument, and killp is the unprocessed prefix argument. Therefore, if a prefix argument is supplied, the text is saved in the kill ring. If no prefix argument is supplied, then one character is deleted, but not saved in the kill ring.
The value returned is always nil.
This option specifies how backward-delete-char-untabify should deal
with whitespace. Possible values include untabify, the default,
meaning convert a tab to many spaces and delete one; hungry, meaning
delete all tabs and spaces before point with one command; all meaning
delete all tabs, spaces and newlines before point, and nil, meaning
do nothing special for whitespace characters.
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Ce document a été généré par Eric Reinbold le 13 Octobre 2007 en utilisant texi2html 1.78.