Class: Campa::Lisp::Car

Inherits:

Object

Object
Campa::Lisp::Car

show all

Defined in:: lib/campa/lisp/car.rb

Instance Method Summary collapse

#call(list) ⇒ Object
#initialize ⇒ Car constructor

A new instance of Car.

Constructor Details

#initialize ⇒ `Car`



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# File 'lib/campa/lisp/car.rb', line 4

def initialize
  @printer = Printer.new
end

Instance Method Details

#call(list) ⇒ `Object`

# File 'lib/campa/lisp/car.rb', line 8

def call(list)
  return nil if list.nil? || list == List::EMPTY
  raise illegal_argument(list) if !list.is_a?(List)

  list.head
end