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Document negative repeat counts for search-forward and search-backward.

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* doc/lispref/searching.texi (String Search): Document negative repeat count.

* src/search.c (Fsearch_forward, Fsearch_backward): Document negative
repeat counts (Bug#10507).
This commit is contained in:
Chong Yidong 2012-01-26 23:48:27 +08:00
parent 8681f11d3b
commit acc28cb93b
4 changed files with 27 additions and 11 deletions
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5
doc/lispref/ChangeLog
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@ -1,3 +1,8 @@
2012-01-26 Chong Yidong <cyd@gnu.org>
* searching.texi (String Search): Document negative repeat count
(Bug#10507).
2012-01-26 Glenn Morris <rgm@gnu.org>
* variables.texi (Using Lexical Binding):

20
doc/lispref/searching.texi
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@ -49,7 +49,6 @@ This function searches forward from point for an exact match for
@var{string}. If successful, it sets point to the end of the occurrence
found, and returns the new value of point. If no match is found, the
value and side effects depend on @var{noerror} (see below).
@c Emacs 19 feature
In the following example, point is initially at the beginning of the
line. Then @code{(search-forward "fox")} moves point after the last
@ -91,18 +90,21 @@ The argument @var{noerror} only affects valid searches which fail to
find a match. Invalid arguments cause errors regardless of
@var{noerror}.
If @var{repeat} is supplied (it must be a positive number), then the
search is repeated that many times (each time starting at the end of the
previous time's match). If these successive searches succeed, the
function succeeds, moving point and returning its new value. Otherwise
the search fails, with results depending on the value of
@var{noerror}, as described above.
If @var{repeat} is a positive number @var{n}, it serves as a repeat
count: the search is repeated @var{n} times, each time starting at the
end of the previous time's match. If these successive searches
succeed, the function succeeds, moving point and returning its new
value. Otherwise the search fails, with results depending on the
value of @var{noerror}, as described above. If @var{repeat} is a
negative number -@var{n}, it serves as a repeat count of @var{n} for a
search in the opposite (backward) direction.
@end deffn
@deffn Command search-backward string &optional limit noerror repeat
This function searches backward from point for @var{string}. It is
just like @code{search-forward} except that it searches backwards and
leaves point at the beginning of the match.
like @code{search-forward}, except that it searches backwards rather
than forwards. Backward searches leave point at the beginning of the
match.
@end deffn
@deffn Command word-search-forward string &optional limit noerror repeat

5
src/ChangeLog
View file

@ -1,3 +1,8 @@
2012-01-26 Chong Yidong <cyd@gnu.org>
* search.c (Fsearch_forward, Fsearch_backward): Document negative
repeat counts (Bug#10507).
2012-01-26 Glenn Morris <rgm@gnu.org>
* lread.c (syms_of_lread): Doc fix.

8
src/search.c
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@ -2181,7 +2181,9 @@ An optional second argument bounds the search; it is a buffer position.
The match found must not extend before that position.
Optional third argument, if t, means if fail just return nil (no error).
If not nil and not t, position at limit of search and return nil.
Optional fourth argument is repeat count--search for successive occurrences.
Optional fourth argument COUNT, if non-nil, means to search for COUNT
successive occurrences. If COUNT is negative, search forward,
instead of backward, for -COUNT occurrences.
Search case-sensitivity is determined by the value of the variable
`case-fold-search', which see.
@ -2200,7 +2202,9 @@ The match found must not extend after that position. A value of nil is
equivalent to (point-max).
Optional third argument, if t, means if fail just return nil (no error).
If not nil and not t, move to limit of search and return nil.
Optional fourth argument is repeat count--search for successive occurrences.
Optional fourth argument COUNT, if non-nil, means to search for COUNT
successive occurrences. If COUNT is negative, search backward,
instead of forward, for -COUNT occurrences.
Search case-sensitivity is determined by the value of the variable
`case-fold-search', which see.