class Lisp::Boolean
Public Class Methods
FALSE()
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# File lib/rubylisp/boolean.rb, line 8 def self.FALSE @false_constant ||= Lisp::Boolean.new(false) end
TRUE()
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# File lib/rubylisp/boolean.rb, line 4 def self.TRUE @true_constant ||= Lisp::Boolean.new(true) end
new(b)
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# File lib/rubylisp/boolean.rb, line 16 def initialize(b) @value = b end
with_value(b)
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# File lib/rubylisp/boolean.rb, line 12 def self.with_value(b) b ? self.TRUE : self.FALSE end
Public Instance Methods
boolean?()
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# File lib/rubylisp/boolean.rb, line 24 def boolean? true end
false?()
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# File lib/rubylisp/boolean.rb, line 40 def false? !@value end
negate()
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# File lib/rubylisp/boolean.rb, line 44 def negate Lisp::Boolean.with_value(!@value) end
to_s()
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# File lib/rubylisp/boolean.rb, line 28 def to_s if @value "#t" else "#f" end end
true?()
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# File lib/rubylisp/boolean.rb, line 36 def true? @value end
type()
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# File lib/rubylisp/boolean.rb, line 20 def type :boolean end