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authorStefan Monnier2019-03-21 08:27:39 -0400
committerStefan Monnier2019-03-21 08:27:39 -0400
commitc569cceb2d334564d320d2b4098c855db7eb88a0 (patch)
treef69d3c89a4a426f0f92131739fab07b599dbfd2f
parent1fc6afbdf1ce0f8b23780bd4d2630ed49f365013 (diff)
downloademacs-c569cceb2d334564d320d2b4098c855db7eb88a0.tar.gz
emacs-c569cceb2d334564d320d2b4098c855db7eb88a0.zip
* 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 [...].
-rw-r--r--doc/emacs/search.texi9
-rw-r--r--doc/lispref/searching.texi14
2 files changed, 11 insertions, 12 deletions
diff --git a/doc/emacs/search.texi b/doc/emacs/search.texi
index 9c58ef471fe..a1c987c1252 100644
--- a/doc/emacs/search.texi
+++ b/doc/emacs/search.texi
@@ -974,11 +974,10 @@ character class inside a character alternative. For instance,
974elisp, The Emacs Lisp Reference Manual}, for a list of character 974elisp, The Emacs Lisp Reference Manual}, for a list of character
975classes. 975classes.
976 976
977To include a @samp{]} in a character set, you must make it the first 977To include a @samp{]} in a character set, you must make it the first character.
978character. For example, @samp{[]a]} matches @samp{]} or @samp{a}. To 978For example, @samp{[]a]} matches @samp{]} or @samp{a}. To include a @samp{-},
979include a @samp{-}, write @samp{-} as the first or last character of the 979write @samp{-} as the last character of the set, tho you can also put it first
980set, or put it after a range. Thus, @samp{[]-]} matches both @samp{]} 980or after a range. Thus, @samp{[]-]} matches both @samp{]} and @samp{-}.
981and @samp{-}.
982 981
983To include @samp{^} in a set, put it anywhere but at the beginning of 982To include @samp{^} in a set, put it anywhere but at the beginning of
984the set. (At the beginning, it complements the set---see below.) 983the set. (At the beginning, it complements the set---see below.)
diff --git a/doc/lispref/searching.texi b/doc/lispref/searching.texi
index 740be2a31ff..0f312915f9e 100644
--- a/doc/lispref/searching.texi
+++ b/doc/lispref/searching.texi
@@ -406,13 +406,13 @@ Note also that the usual regexp special characters are not special inside a
406character alternative. A completely different set of characters is 406character alternative. A completely different set of characters is
407special inside character alternatives: @samp{]}, @samp{-} and @samp{^}. 407special inside character alternatives: @samp{]}, @samp{-} and @samp{^}.
408 408
409To include a @samp{]} in a character alternative, you must make it the 409To include a @samp{]} in a character alternative, you must make it the first
410first character. For example, @samp{[]a]} matches @samp{]} or @samp{a}. 410character. For example, @samp{[]a]} matches @samp{]} or @samp{a}. To include
411To include a @samp{-}, write @samp{-} as the first or last character of 411a @samp{-}, write @samp{-} as the last character of the character alternative,
412the character alternative, or put it after a range. Thus, @samp{[]-]} 412tho you can also put it first or after a range. Thus, @samp{[]-]} matches both
413matches both @samp{]} and @samp{-}. (As explained below, you cannot 413@samp{]} and @samp{-}. (As explained below, you cannot use @samp{\]} to
414use @samp{\]} to include a @samp{]} inside a character alternative, 414include a @samp{]} inside a character alternative, since @samp{\} is not
415since @samp{\} is not special there.) 415special there.)
416 416
417To include @samp{^} in a character alternative, put it anywhere but at 417To include @samp{^} in a character alternative, put it anywhere but at
418the beginning. 418the beginning.