Class: Module

Inherits:
Object show all
Defined in:
lib/hobo_support/module.rb,
lib/hobo_support/fixes/module.rb

Instance Method Summary collapse

Instance Method Details

#alias_method_chain(target, feature) {|aliased_target, punctuation| ... } ⇒ Object

Custom alias_method_chain that won’t cause inifinite recursion if called twice. Calling alias_method_chain on alias_method_chain was just way to confusing, so I copied it :-/

Yields:

  • (aliased_target, punctuation) 


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# File 'lib/hobo_support/fixes/module.rb', line 7

def alias_method_chain(target, feature)
  # Strip out punctuation on predicates or bang methods since
  # e.g. target?_without_feature is not a valid method name.
  aliased_target, punctuation = target.to_s.sub(/([?!=])$/, ''), $1
  yield(aliased_target, punctuation) if block_given?
  without = "#{aliased_target}_without_#{feature}#{punctuation}"
  unless method_defined?(without)
    alias_method without, target
    alias_method target, "#{aliased_target}_with_#{feature}#{punctuation}"
  end
end

#delegate(*methods) ⇒ Object

Fix delegate so it doesn’t go bang if ‘to’ is nil



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# File 'lib/hobo_support/fixes/module.rb', line 21

def delegate(*methods)
  options = methods.pop
  unless options.is_a?(Hash) && to = options[:to]
    raise ArgumentError, ("Delegation needs a target. Supply an options hash with a :to key"  +
                          "as the last argument (e.g. delegate :hello, :to => :greeter).")
  end

  methods.each do |method|
    module_eval(<<-EOS, "(__DELEGATION__)", 1)
      def #{method}(*args, &block)
        (_to = #{to}) && _to.__send__(#{method.inspect}, *args, &block)
      end
    EOS
  end
end