Class: AjLisp::EmptyList

Inherits:
List
  • Object
show all
Defined in:
lib/ajlisp/list.rb

Constant Summary collapse

@@instance =

private_class_method :new

nil

Instance Attribute Summary

Attributes inherited from List

#first, #rest

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from List

#evaluate, #initialize, make

Constructor Details

This class inherits a constructor from AjLisp::List

Class Method Details

.instance ⇒ Object 



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# File 'lib/ajlisp/list.rb', line 91

def self.instance
    @@instance = new unless @@instance
    return @@instance
end

Instance Method Details

#isEqualTo(list) ⇒ Object 



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# File 'lib/ajlisp/list.rb', line 100

def isEqualTo(list)
    return list.is_a? EmptyList
end

#to_s ⇒ Object 



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# File 'lib/ajlisp/list.rb', line 96

def to_s
    return "()"
end