[英]Perl Regex return named groups in capture Group one
I try to get a regex which returns the match in the first capture group.我尝试获取一个正则表达式,它返回第一个捕获组中的匹配项。
The Application where I put the regex in can only use the first capture Group.我放入正则表达式的应用程序只能使用第一个捕获组。
Each regex on it's own is working, but i can't combine these two in a way that the output is always in the first capture group每个正则表达式都在工作,但我不能将这两个组合在一起,使 output 始终在第一个捕获组中
Input 1:输入 1:
Event: Started Flapping
Regex 1:正则表达式 1:
^Event: (\S+ Flapping)
Output 1: Output 1:
Started Flapping
Input 2:输入 2:
Event: CRIT -> OK
Regex 2:正则表达式 2:
^Event:\s+\S+\s+\S+\s+(\S+)
Ouput 2:输出 2:
OK
The Regex i tried (?:^Event:\s+\S+\s+\S+\s+(?P<service>\S+)$|^Event: (?P<flap>Started Flapping)|((?P=service)|(?P=flap)))
我试过的正则表达式
(?:^Event:\s+\S+\s+\S+\s+(?P<service>\S+)$|^Event: (?P<flap>Started Flapping)|((?P=service)|(?P=flap)))
You can use a branch reset group :您可以使用 分支重置组:
^Event:\s+(?|\S+\s+\S+\s+(\S+)|(Started Flapping))$
# or, to factor in \S+\s+:
^Event:\s+(?|(?:\S+\s+){2}(\S+)|(Started Flapping))$
See the regex demo .请参阅正则表达式演示。 Details :
详情:
^
- start of string ^
- 字符串的开头Event:
- a fixed string Event:
- 固定字符串\s+
- one or more whitespaces \s+
- 一个或多个空格(?|
- start of a branch reset group: (?|
- 分支重置组的开始:
\S+\s+\S+\s+
- two occurrences of one or more non-whitespaces followed with one or more whitespaces \S+\s+\S+\s+
- 两次出现一个或多个非空格,后跟一个或多个空格(\S+)
- Group 1: one or more non-whitespaces (\S+)
- 第 1 组:一个或多个非空格|
- or (Started Flapping)
- Group 1: Started Flapping
fixed string (Started Flapping)
- 第 1 组: Started Flapping
固定琴弦)
- end of the branch reset group )
- 分支重置组结束$
- end of string. $
- 字符串结束。
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