Class: Lrama::State::Reduce

Inherits:
Object
  • Object
show all
Defined in:
lib/lrama/state/reduce.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(item) ⇒ Reduce 



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# File 'lib/lrama/state/reduce.rb', line 8

def initialize(item)
  @item = item
  @look_ahead = nil
  @not_selected_symbols = []
end

Instance Attribute Details

#default_reduction ⇒ Object

Returns the value of attribute default_reduction.



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# File 'lib/lrama/state/reduce.rb', line 6

def default_reduction
  @default_reduction
end

#item ⇒ Object (readonly)

www.gnu.org/software/bison/manual/html_node/Default-Reductions.html



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# File 'lib/lrama/state/reduce.rb', line 5

def item
  @item
end

#look_ahead ⇒ Object

www.gnu.org/software/bison/manual/html_node/Default-Reductions.html



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# File 'lib/lrama/state/reduce.rb', line 5

def look_ahead
  @look_ahead
end

#not_selected_symbols ⇒ Object (readonly)

www.gnu.org/software/bison/manual/html_node/Default-Reductions.html



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# File 'lib/lrama/state/reduce.rb', line 5

def not_selected_symbols
  @not_selected_symbols
end

Instance Method Details

#add_not_selected_symbol(sym) ⇒ Object 



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# File 'lib/lrama/state/reduce.rb', line 22

def add_not_selected_symbol(sym)
  @not_selected_symbols << sym
end

#rule ⇒ Object 



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# File 'lib/lrama/state/reduce.rb', line 14

def rule
  @item.rule
end

#selected_look_ahead ⇒ Object 



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# File 'lib/lrama/state/reduce.rb', line 26

def selected_look_ahead
  if @look_ahead
    @look_ahead - @not_selected_symbols
  else
    []
  end
end