Commit c569cceb authored by Stefan Monnier's avatar Stefan Monnier

* doc: Recommend putting '-' as last char in Emacs charset regexps

* doc/lispref/searching.texi (Regexp Special):
* doc/emacs/search.texi (Regexps): Recommend - as last char in [...].
parent 1fc6afbd
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......@@ -974,11 +974,10 @@ character class inside a character alternative. For instance,
elisp, The Emacs Lisp Reference Manual}, for a list of character
classes.
To include a @samp{]} in a character set, you must make it the first
character. For example, @samp{[]a]} matches @samp{]} or @samp{a}. To
include a @samp{-}, write @samp{-} as the first or last character of the
set, or put it after a range. Thus, @samp{[]-]} matches both @samp{]}
and @samp{-}.
To include a @samp{]} in a character set, you must make it the first character.
For example, @samp{[]a]} matches @samp{]} or @samp{a}. To include a @samp{-},
write @samp{-} as the last character of the set, tho you can also put it first
or after a range. Thus, @samp{[]-]} matches both @samp{]} and @samp{-}.
To include @samp{^} in a set, put it anywhere but at the beginning of
the set. (At the beginning, it complements the set---see below.)
......
......@@ -406,13 +406,13 @@ Note also that the usual regexp special characters are not special inside a
character alternative. A completely different set of characters is
special inside character alternatives: @samp{]}, @samp{-} and @samp{^}.
To include a @samp{]} in a character alternative, you must make it the
first character. For example, @samp{[]a]} matches @samp{]} or @samp{a}.
To include a @samp{-}, write @samp{-} as the first or last character of
the character alternative, or put it after a range. Thus, @samp{[]-]}
matches both @samp{]} and @samp{-}. (As explained below, you cannot
use @samp{\]} to include a @samp{]} inside a character alternative,
since @samp{\} is not special there.)
To include a @samp{]} in a character alternative, you must make it the first
character. For example, @samp{[]a]} matches @samp{]} or @samp{a}. To include
a @samp{-}, write @samp{-} as the last character of the character alternative,
tho you can also put it first or after a range. Thus, @samp{[]-]} matches both
@samp{]} and @samp{-}. (As explained below, you cannot use @samp{\]} to
include a @samp{]} inside a character alternative, since @samp{\} is not
special there.)
To include @samp{^} in a character alternative, put it anywhere but at
the beginning.
......
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