diff options
| author | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2022-09-05 18:21:29 +0900 |
|---|---|---|
| committer | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2022-09-05 19:36:21 +0900 |
| commit | a8a7c9d05d2f9a4f49b43a42d8430faa37c4a4c6 (patch) | |
| tree | 085273afa6e1ef3beaffffec515cd27926f0f1a8 | |
| parent | 4331d4bbf0dad5903fa42dff9e489949bbc275e8 (diff) | |
[DOC] [Bug #17120] Fix match-reset `\K`
| -rw-r--r-- | doc/regexp.rdoc | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/doc/regexp.rdoc b/doc/regexp.rdoc index f3844d5729..a7e2a0786e 100644 --- a/doc/regexp.rdoc +++ b/doc/regexp.rdoc @@ -550,12 +550,16 @@ characters, <i>anchoring</i> the match to a specific position. * <tt>(?<!</tt><i>pat</i><tt>)</tt> - <i>Negative lookbehind</i> assertion: ensures that the preceding characters do not match <i>pat</i>, but doesn't include those characters in the matched text -* <tt>\K</tt> - Uses an positive lookbehind of the content preceding - <tt>\K</tt> in the regexp. For example, the following two regexps are - almost equivalent: - /ab\Kc/ - /(?<=ab)c/ +* <tt>\K</tt> - <i>Match reset</i>: the matched content preceding + <tt>\K</tt> in the regexp is excluded from the result. For example, + the following two regexps are almost equivalent: + + /ab\Kc/ =~ "abc" #=> 0 + /(?<=ab)c/ =~ "abc" #=> 2 + + These match same string and <i>$&</i> equals <tt>"c"</tt>, while the + matched position is different. As are the following two regexps: |