# File lib/rack/mount/vendor/regin/regin/group.rb, line 28 def to_s(parent = false) if lookahead == :postive "(?=#{expression.to_s(parent)})#{quantifier}" elsif lookahead == :negative "(?!#{expression.to_s(parent)})#{quantifier}" elsif !expression.options? "(#{capture ? '' : '?:'}#{expression.to_s(parent)})#{quantifier}" elsif capture == false "#{expression.to_s}#{quantifier}" else "(#{expression.to_s})#{quantifier}" end end