move

# File actionpack/lib/action_dispatch/journey/gtg/transition_table.rb, line 48
        def move(t, full_string, start_index, end_index)
          return [] if t.empty?

          next_states = []

          tok = full_string.slice(start_index, end_index - start_index)
          token_matches_default_component = DEFAULT_EXP_ANCHORED.match?(tok)

          t.each { |s, previous_start|
            if previous_start.nil?
              # In the simple case of a "default" param regex do this fast-path
              # and add all next states.
              if token_matches_default_component && states = @stdparam_states[s]
                states.each { |re, v| next_states << [v, nil].freeze if !v.nil? }
              end

              # When we have a literal string, we can just pull the next state
              if states = @string_states[s]
                next_states << [states[tok], nil].freeze unless states[tok].nil?
              end
            end

            # For regexes that aren't the "default" style, they may potentially
            # not be terminated by the first "token" [./?], so we need to continue
            # to attempt to match this regexp as well as any successful paths that
            # continue out of it. both paths could be valid.
            if states = @regexp_states[s]
              slice_start = if previous_start.nil?
                start_index
              else
                previous_start
              end

              slice_length = end_index - slice_start
              curr_slice = full_string.slice(slice_start, slice_length)

              states.each { |re, v|
                # if we match, we can try moving past this
                next_states << [v, nil].freeze if !v.nil? && re.match?(curr_slice)
              }

              # and regardless, we must continue accepting tokens and retrying this regexp.
              # we need to remember where we started as well so we can take bigger slices.
              next_states << [s, slice_start].freeze
            end
          }

          next_states
        end