Class: Module

Inherits:
Object
  • Object
show all
Defined in:
lib/fp_rb.rb,
lib/fn_reader.rb

Instance Method Summary collapse

Instance Method Details

#fn_reader(*syms) ⇒ Object

Stripped down version of ActiveSupport’s mattr_reader (don’t want Rails dependencies)



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# File 'lib/fp_rb.rb', line 5

def fn_reader(*syms)
  syms.each do |sym|
    raise StandardError.new("invalid attribute name: #{sym}") unless (sym =~ /\A[_A-Za-z]\w*\z/)
    class_eval(<<-EOS, __FILE__, __LINE__ + 1)
      @@#{sym} = nil unless defined? @@#{sym}
      def self.#{sym}
        @@#{sym}
      end
    EOS

    class_eval(<<-EOS, __FILE__, __LINE__ + 1)
        def #{sym}
          @@#{sym}
        end
      EOS
  end
end