class Racc::State

def check_la(la_rules)
  @conflict = false
  s = []
  r = []
  @closure.each do |ptr|
    if t = ptr.dereference
      if t.terminal?
        s[t.ident] = t
        if t.ident == 1    # $error
          @conflict = true
        end
      end
    else
      r.push ptr.rule
    end
  end
  unless r.empty?
    if not s.empty? or r.size > 1
      @conflict = true
    end
  end
  s.compact!
  @stokens  = s
  @rrules = r
  if @conflict
    @la_rules_i = la_rules.size
    @la_rules = r.map {|i| i.ident }
    la_rules.concat r
  else
    @la_rules_i = @la_rules = nil
  end
end