class Racc::ActionTable - racc: Ruby Standard Library Documentation

# class Racc::ActionTable

The table of LALR actions. Actions are either of `Shift`, `Reduce`, `Accept` and `Error`.

### Attributes

accept[R]
error[R]

### Public Class Methods

new(rt, st) click to toggle source

    # File racc-1.8.1/lib/racc/state.rb, line 817
    def initialize(rt, st)
      @grammar = rt
      @statetable = st

      @reduce = []
      @shift = []
      @accept = nil
      @error = nil
    end

### Public Instance Methods

each_reduce(&block) click to toggle source

    # File racc-1.8.1/lib/racc/state.rb, line 855
    def each_reduce(&block)
      @reduce.each(&block)
    end

each_shift(&block) click to toggle source

    # File racc-1.8.1/lib/racc/state.rb, line 874
    def each_shift(&block)
      @shift.each(&block)
    end

init() click to toggle source

    # File racc-1.8.1/lib/racc/state.rb, line 827
    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

reduce(i) click to toggle source

    # File racc-1.8.1/lib/racc/state.rb, line 842
    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

reduce_n() click to toggle source

    # File racc-1.8.1/lib/racc/state.rb, line 838
    def reduce_n
      @reduce.size
    end

shift(i) click to toggle source

    # File racc-1.8.1/lib/racc/state.rb, line 863
    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

shift_n() click to toggle source

    # File racc-1.8.1/lib/racc/state.rb, line 859
    def shift_n
      @shift.size
    end