requirements_anchored?

# File actionpack/lib/action_dispatch/journey/path/pattern.rb, line 36
        def requirements_anchored?
          # each required param must not be surrounded by a literal, otherwise it isn't
          # simple to chunk-match the url piecemeal
          terminals = ast.terminals

          terminals.each_with_index { |s, index|
            next if index < 1
            next if s.type == :DOT || s.type == :SLASH

            back = terminals[index - 1]
            fwd = terminals[index + 1]

            # we also don't support this yet, constraints must be regexps
            return false if s.symbol? && s.regexp.is_a?(Array)

            return false if back.literal?
            return false if !fwd.nil? && fwd.literal?
          }

          true
        end