Class: Cry::ParseTree

Inherits:
Array
  • Object
show all
Defined in:
lib/parse_tree.rb

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ ParseTree

Returns a new instance of ParseTree.



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# File 'lib/parse_tree.rb', line 3

def initialize(*args)
  super args.to_ary
end

Instance Method Details

#evaluate ⇒ Object 



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# File 'lib/parse_tree.rb', line 7

def evaluate
  evaluated_node_object = evaluate_node(node_object)
  raw_send_arguments = node_arguments.map{|argument| evaluate_node(argument) }.insert(0, node_method)
  evaluated_node_object.send *raw_send_arguments
rescue ArgumentError => original_error
  begin
    standard_send_arguments = raw_send_arguments
    block_send_argument = raw_send_arguments.pop
    evaluated_node_object.send *standard_send_arguments, &block_send_argument
  rescue Exception
    raise original_error
  end
end

#height ⇒ Object 



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# File 'lib/parse_tree.rb', line 45

def height
  (node_method ? 1 : 0) + self[1..size].to_a.map{|node| node.is_a?(ParseTree) ? node.height : 1 }.max.to_i
end

#inspect ⇒ Object Also known as: to_s 



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# File 'lib/parse_tree.rb', line 49

def inspect
  super.sub(/^\[/, "(").sub(/\]$/, ")")
end

#node_arguments ⇒ Object 



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# File 'lib/parse_tree.rb', line 37

def node_arguments
  size >= 2 ? self[2..size].to_a : Array.new
end

#node_arguments=(node_arguments) ⇒ Object 



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# File 'lib/parse_tree.rb', line 41

def node_arguments=(node_arguments)
  self[2..size] = node_arguments
end

#node_method ⇒ Object 



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# File 'lib/parse_tree.rb', line 21

def node_method
  self.first.to_sym unless empty?
end

#node_method=(node_method) ⇒ Object 



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# File 'lib/parse_tree.rb', line 25

def node_method=(node_method)
  self[0] = node_method.to_sym
end

#node_object ⇒ Object 



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# File 'lib/parse_tree.rb', line 29

def node_object
  self[1] unless size < 2
end

#node_object=(node_object) ⇒ Object 



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# File 'lib/parse_tree.rb', line 33

def node_object=(node_object)
  self[1] = node_object
end