class Racc::States

def resolve_rr(state, r)
  r.each do |item|
    item.each_la(@symboltable) do |t|
      act = state.action[t]
      if act
        unless act.kind_of?(Reduce)
          raise "racc: fatal: #{act.class} in action table"
        end
        # Cannot resolve R/R conflict (on t).
        # Reduce with upper rule as default.
        state.rr_conflict act.rule, item.rule, t
      else
        # No conflict.
        state.action[t] = @actions.reduce(item.rule)
      end
    end
  end
end