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Diffstat (limited to 'doc/lispref/searching.texi')
| -rw-r--r-- | doc/lispref/searching.texi | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/doc/lispref/searching.texi b/doc/lispref/searching.texi index 5f4509a8b43..1f6db0643e8 100644 --- a/doc/lispref/searching.texi +++ b/doc/lispref/searching.texi @@ -1745,7 +1745,7 @@ any special characters. @end defun @cindex optimize regexp -@defun regexp-opt strings &optional paren keep-order +@defun regexp-opt strings &optional paren This function returns an efficient regular expression that will match any of the strings in the list @var{strings}. This is useful when you need to make matching or searching as fast as possible---for example, @@ -1783,11 +1783,8 @@ if it is necessary to ensure that a postfix operator appended to it will apply to the whole expression. @end table -The optional argument @var{keep-order}, if non-@code{nil}, forces the -match to be performed in the order given, as if the strings were made -into a regexp by joining them with the @samp{\|} operator. If nil or -omitted, the returned regexp will always match the longest string -possible. +The returned regexp is ordered in such a way that it will always match +the longest string possible. Up to reordering, the resulting regexp of @code{regexp-opt} is equivalent to but usually more efficient than that of a simplified |