For example I want to match three values, required text, optional times and id, and the format of id is [id=100000], how can I match data correctly when text contains spaces.
my reg: (?<text>[\s\S] ) (?<times>\d )? (\[id=(?<id>\d )])?
example source text: hello world 1 [id=10000]
In this example, all of source text are matched in text
CodePudding user response：
The problem with your pattern is that matches any whitespace and non whitespace one and unlimited times, which captures everything without getting the other desired capture groups. Also, with a little help with the positive lookahead and alternate (|) , we can make the last 2 capture groups desired optional.
The final pattern (?<text>[a-zA-Z ] )(?=$|(?<times>\d )? \[id=(?<id>\d )])
- Group text will match any letter and spaces.
- The lookahead avoid consuming characters and we should match either the string ended, or have a number and [id=number]
Said that, regex101 with further explanation and some examples
CodePudding user response：
You could use:
:\s*(?<text>[^][:] ?)\s*(?<times>\d )? \[id=(?<id>\d )]
Explanation
:Match literally\s*Match optional whitespace chars(?<text>Group text[^][:] ?match 1 occurrences of any char except[]:
)Close group text\s*Match optional whitespace chars(?<times>\d )?Group times, match 1 digits\[id=Match[id=(?<id>\d )Group id, match 1 digirs]Match literally