Class: Furnace::AVM2::Transform::PropagateLabels

Inherits:
Object
  • Object
show all
Includes:
Visitor
Defined in:
lib/furnace-avm2/transform/propagate_labels.rb

Instance Method Summary collapse

Instance Method Details

#on_any(node) ⇒ Object 



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# File 'lib/furnace-avm2/transform/propagate_labels.rb', line 12

def on_any(node)
  return if node.type == :root

  label = nil

  node.children.each do |child|
    if child.is_a?(AST::Node) && child.metadata[:label]
      if label.nil? || child.metadata[:label] < label
        label = child.metadata[:label]
      end

      child.metadata.delete :label
    end
  end

  node.metadata[:label] = label if label
end

#transform(ast, *stuff) ⇒ Object 



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# File 'lib/furnace-avm2/transform/propagate_labels.rb', line 6

def transform(ast, *stuff)
  visit ast      # propagate labels

  [ ast, *stuff ]
end