parse_expressions

# File actionpack/lib/action_dispatch/journey/parser.rb, line 35
        def parse_expressions
          node = parse_expression

          while @next_token
            case @next_token
            when :RPAREN
              break
            when :OR
              node = parse_or(node)
            else
              node = Cat.new(node, parse_expressions)
            end
          end

          node
        end