Regex to match only innermost delimited sequence

Question

I have a string that contains sequences delimited by multiple characters: << and >>. I need a regular expression to only give me the

Answer 1

$string = 'do not match this <> not this <> IT HAS CHILDREN>> < this>>';
@matches = $string =~ /(<<(?:[^<>]+|<(?!<)|>(?!>))*>>)/g;