Class: Module

Inherits:
Object show all
Includes:
CacheMethods
Defined in:
lib/tins/memoize.rb,
lib/tins/xt/named.rb

Direct Known Subclasses

Tins::NullClass

Instance Method Summary collapse

Instance Method Details

#memoize_function(*function_ids) ⇒ Object

Automatically memoize calls of the functions function_ids. The memoized result does ONLY depend on the arguments given to the function.



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# File 'lib/tins/memoize.rb', line 46

def memoize_function(*function_ids)
  function_ids.extend(ExtractLastArgumentOptions)
  function_ids, opts = function_ids.extract_last_argument_options
  mc = __memoize_cache__
  function_ids.each do |method_id|
    method_id = method_id.to_s.to_sym
    orig_method = instance_method(method_id)
    __send__(:define_method, method_id) do |*args|
      if mc.key?(method_id) and result = mc[method_id][args]
        result
      else
        (mc[method_id] ||= {})[args] = result = orig_method.bind(self).call(*args)
        opts[:freeze] and result.freeze
        $DEBUG and warn "#{self.class} cached function #{method_id}(#{args.inspect unless args.empty?}) = #{result.inspect}"
      end
      result
    end
  end
end

#memoize_method(*method_ids) ⇒ Object

Automatically memoize calls of the the methods method_ids. The memoized results do NOT ONLY depend on the arguments, but ALSO on the object the method is called on.



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# File 'lib/tins/memoize.rb', line 20

def memoize_method(*method_ids)
  method_ids.extend(ExtractLastArgumentOptions)
  method_ids, opts = method_ids.extract_last_argument_options
  include CacheMethods
  method_ids.each do |method_id|
    method_id = method_id.to_s.to_sym
    orig_method = instance_method(method_id)
    __send__(:define_method, method_id) do |*args|
      mc = __memoize_cache__
      if mc.key?(method_id) and result = mc[method_id][args]
        result
      else
        (mc[method_id] ||= {})[args] = result = orig_method.bind(self).call(*args)
        $DEBUG and warn "#{self.class} cached method #{method_id}(#{args.inspect unless args.empty?}) = #{result.inspect} [#{__id__}]"
        opts[:freeze] and result.freeze
      end
      result
    end
  end
end

#named(name, method, *args, &block) ⇒ Object 



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# File 'lib/tins/xt/named.rb', line 22

def named(name, method, *args, &named_block)
  include Module.new {
    define_method(name) do |*rest, &block|
      block = named_block if named_block
      __send__(method, *(args + rest), &block)
    end
  }
end