diff options
| -rw-r--r-- | doc/lispref/searching.texi | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/doc/lispref/searching.texi b/doc/lispref/searching.texi index 8b900da616f..1ee4be7dd13 100644 --- a/doc/lispref/searching.texi +++ b/doc/lispref/searching.texi @@ -363,7 +363,7 @@ preceding expression either once or not at all. For example, @anchor{Non-greedy repetition} @item @samp{*?}, @samp{+?}, @samp{??} @cindex non-greedy repetition characters in regexp -These are @dfn{non-greedy} variants of the operators @samp{*}, @samp{+} +are @dfn{non-greedy} variants of the operators @samp{*}, @samp{+} and @samp{?}. Where those operators match the largest possible substring (consistent with matching the entire containing expression), the non-greedy variants match the smallest possible substring @@ -438,6 +438,13 @@ including newline. However, a reversed range should always be from the letter @samp{z} to the letter @samp{a} to make it clear that it is not a typo; for example, @samp{[+-*/]} should be avoided, because it matches only @samp{/} rather than the likely-intended four characters. + +@item +If the end points of a range are raw 8-bit bytes (@pxref{Text +Representations}), or if the range start is ASCII and the end is a raw +byte (as in @samp{[a-\377]}), the range will match only ASCII +characters and raw 8-bit bytes, but not non-ASCII characters. This +feature is intended for searching text in unibyte buffers and strings. @end enumerate Some kinds of character alternatives are not the best style even |