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# File 'lib/furnace/ast/visitor.rb', line 3
def visit(node)
replacements = {}
node.children.each_with_index do |child, index|
if child.is_a? Node
visit child
if child.type == :expand
replacements[index] = child.children
end
end
end
if replacements.any?
new_children = []
node.children.each_with_index do |child, index|
if replacements[index]
new_children.concat replacements[index]
else
new_children.push child
end
end
node.children.replace new_children
end
node.children.delete_if do |child|
if child.is_a? Node
child.parent = node
child.type == :remove
end
end
on_handler = :"on_#{node.type}"
if respond_to? on_handler
send on_handler, node
end
if respond_to? :on_any
send :on_any, node
end
node
end
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