class Racc::ActionTable

def each_reduce(&block)
  @reduce.each(&block)
end

def each_shift(&block)
  @shift.each(&block)
end

def init
  @grammar.each do |rule|
    @reduce.push Reduce.new(rule)
  end
  @statetable.each do |state|
    @shift.push Shift.new(state)
  end
  @accept = Accept.new
  @error = Error.new
end

def initialize(rt, st)
  @grammar = rt
  @statetable = st
  @reduce = []
  @shift = []
  @accept = nil
  @error = nil
end

def reduce(i)
  case i
  when Rule    then i = i.ident
  when Integer then ;
  else
    raise "racc: fatal: wrong class #{i.class} for reduce"
  end
  r = @reduce[i] or raise "racc: fatal: reduce action #{i.inspect} not exist"
  r.incref
  r
end

def reduce_n
  @reduce.size
end

def shift(i)
  case i
  when State   then i = i.ident
  when Integer then ;
  else
    raise "racc: fatal: wrong class #{i.class} for shift"
  end
  @shift[i] or raise "racc: fatal: shift action #{i} does not exist"
end

def shift_n
  @shift.size
end