Class: Class

Inherits:
Object show all
Defined in:
lib/rcal/util/class_attributes.rb

Instance Method Summary (collapse)

Instance Method Details

- (Object) cattr_accessor(*syms)

cattr_reader and cattr_writer in one.

Thanks, Rails!



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# File 'lib/rcal/util/class_attributes.rb', line 62

def cattr_accessor(*syms)
  cattr_reader(*syms)
  cattr_writer(*syms)
end

- (Object) cattr_reader(*syms)

Defines class- and instance-level readers for each class attribute in syms. If any of syms is not yet defined, it is set to nil.

Thanks, Rails!



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# File 'lib/rcal/util/class_attributes.rb', line 11

def cattr_reader(*syms)
  syms.flatten.each do |sym|
    next if sym.is_a?(Hash)
    class_eval(<<-EOS, __FILE__, __LINE__)
      unless defined? @@#{sym}
        @@#{sym} = nil
      end

      def self.#{sym}
        @@#{sym}
      end

      def #{sym}
        @@#{sym}
      end
    EOS
  end
end

- (Object) cattr_writer(*syms)

Defines class- and instance-level writers for each class attribute in syms. If any of syms is not yet defined, it is set to nil.

If syms.last.is_a?(Hash) && syms.last[:instance_writer] == false, does not declare an instance-level writer.

Thanks, Rails!



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# File 'lib/rcal/util/class_attributes.rb', line 38

def cattr_writer(*syms)
  options = syms.extract_options!
  syms.flatten.each do |sym|
    class_eval(<<-EOS, __FILE__, __LINE__)
      unless defined? @@#{sym}
        @@#{sym} = nil
      end

      def self.#{sym}=(obj)
        @@#{sym} = obj
      end

      #{"
      def #{sym}=(obj)
        @@#{sym} = obj
      end
      " unless options[:instance_writer] == false }
    EOS
  end
end