Class: Panini::DerivationStrategy::DampenedProbabilityProductionChoiceProxy

Inherits:
Object
  • Object
show all
Defined in:
lib/derivation_strategy/random_dampened.rb

Instance Method Summary collapse

Constructor Details

#initialize(nonterminal, damping = 0.25) ⇒ DampenedProbabilityProductionChoiceProxy

Returns a new instance of DampenedProbabilityProductionChoiceProxy.



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# File 'lib/derivation_strategy/random_dampened.rb', line 8

def initialize(nonterminal, damping=0.25)
  @nonterminal = nonterminal
  @damping = damping
  @production_counts = @nonterminal.productions.map do
    0
  end
end

Instance Method Details

#dump_weights ⇒ Object 



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# File 'lib/derivation_strategy/random_dampened.rb', line 49

def dump_weights
  puts "production_counts:"
  @weights.each do |weight|
    puts "#{weight} "
  end
end

#initialize_copy(source) ⇒ Object 



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# File 'lib/derivation_strategy/random_dampened.rb', line 16

def initialize_copy(source)
  super
  @production_counts = @production_counts.map do |production_count|
    production_count
  end
end

#production ⇒ Object 



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# File 'lib/derivation_strategy/random_dampened.rb', line 23

def production
  i = find_index
  @production_counts[i] += 1
  @nonterminal.productions[i]
end