Method: ActiveSupport::Concern#included

Defined in:
activesupport/lib/active_support/concern.rb

#included(base = nil, &block) ⇒ Object

Evaluate given block in context of base class, so that you can write class macros here. When you define more than one included block, it raises an exception.



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# File 'activesupport/lib/active_support/concern.rb', line 158

def included(base = nil, &block)
  if base.nil?
    if instance_variable_defined?(:@_included_block)
      if @_included_block.source_location != block.source_location
        raise MultipleIncludedBlocks
      end
    else
      @_included_block = block
    end
  else
    super
  end
end