I am trying to match all content between parentheses, including parentheses in a non-greedy way. There should be a space before and after the opening parentheses (or the start of a line before the opening parentheses) and a space before and after the closing parentheses. Take the following text:
( )
( This is a comment )
1 2 +
\ a
: square dup * ;
( foo bar
baz )
(quux)
( ( )
(
( )
The first line should be matched, the second line including its content should be matched, the second last line should not be matched (or raise an error) and the last line should be matched. The two lines foo bar baz should be matched, but (quux) should not as it doesn't contain a space before and after the parentheses. The line with the extra opening parentheses inside should be matched.
I tried a few conventional regexes for matching content between parentheses but without much success. The regex engine is that of Go's.
