正则表达式捕获组提前终止

Question

I don't usually ask dumb regex questions. But here's one for the regex vultures....

Take these strings...

-This is nice (show cow)
*This (or that) (show mouse)
-Whatever
-Hiya (everyone)

All these should be a match. ie Lead with * or - , then any text, then can conditionally be followed by whitespace and (show xxx) where xxx can be any text. I want these captured separately ie...

-This is nice (show cow)
   Match 1 : 'This is nice'
   Match 2 : '(show cow)' or just 'cow'

*This (or that) (show mouse)
   Match 1 : 'This (or that)'
   Match 2 : 'show mouse' or just 'mouse'

-Whatever
   Match 1 : 'Whatever'

-Hiya (everyone)
   Match 1 : 'Hiya (everyone)'

+Hello
   No Match

I have tried variously...

[\-*](.+?)(\s+\(show (.+)\))?
    Terminates early and only captures 1 char of match 1

[\-*](.+)(\s+\(show (.+)\))?
    Terminates late and captures all of the text as match 1 including `(show....`

[\-*](.+)(\s+\(show (.+)\)$)?
    As above

I'm sure this should be really easy! I don't want to go with negating (show within Match 1 - as I would like to permit this eg -Hello (show a) (show b) where Match 1 is Hello (show a) and Match 2 is (show b) (or just b )

Answer 1

I think you want something like this,

^[-*](.*?)(?: \(show\s*([^)]*)\)|$)

DEMO