method

prepended

rails latest stable - Class: ActiveSupport::Concern

prepended(base = nil, &block)

public

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

# File activesupport/lib/active_support/concern.rb, line 175
    def prepended(base = nil, &block)
      if base.nil?
        if instance_variable_defined?(:@_prepended_block)
          if @_prepended_block.source_location != block.source_location
            raise MultiplePrependBlocks
          end
        else
          @_prepended_block = block
        end
      else
        super
      end
    end

prepended

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