Module: Uinit::Memoizable::ClassMethods

Defined in:
lib/uinit/memoizable.rb

Instance Method Summary collapse

Instance Method Details

#memo(method_sym) ⇒ Object 



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# File 'lib/uinit/memoizable.rb', line 12

def memo(method_sym)
  method = instance_method(method_sym)
  ivar = memo_variable_name(method_sym)

  define_method(method_sym) do |*args, **kwargs|
    return instance_variable_get(ivar) if instance_variable_defined?(ivar)

    instance_variable_set(ivar, method.bind_call(self, *args, **kwargs))
  end
end

#memo_self(method_sym) ⇒ Object 



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# File 'lib/uinit/memoizable.rb', line 23

def memo_self(method_sym)
  method = singleton_class.instance_method(method_sym)
  ivar = memo_variable_name(method_sym)

  define_singleton_method(method_sym) do |*args, **kwargs|
    return singleton_class.instance_variable_get(ivar) if singleton_class.instance_variable_defined?(ivar)

    singleton_class.instance_variable_set(ivar, method.bind_call(self, *args, **kwargs))
  end
end

#memo_unset(method_sym) ⇒ Object 



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# File 'lib/uinit/memoizable.rb', line 34

def memo_unset(method_sym)
  singleton_class.remove_instance_variable(memo_variable_name(method_sym))
end

#memo_variable_name(method_sym) ⇒ Object 



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# File 'lib/uinit/memoizable.rb', line 38

def memo_variable_name(method_sym)
  predicate = method_sym.to_s.end_with?('?')

  :"@#{predicate ? '__memois_' : '__memo_'}#{method_sym.to_s.tr('?', '_')}"
end