62 lines
1.3 KiB
Ruby
62 lines
1.3 KiB
Ruby
# Extends the class object with class and instance accessors for class attributes,
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# just like the native attr* accessors for instance attributes.
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#
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# class Person
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# cattr_accessor :hair_colors
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# end
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#
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# Person.hair_colors = [:brown, :black, :blonde, :red]
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class Class
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def cattr_reader(*syms)
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options = syms.extract_options!
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syms.each do |sym|
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next if sym.is_a?(Hash)
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class_eval(<<-EOS, __FILE__, __LINE__ + 1)
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unless defined? @@#{sym}
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@@#{sym} = nil
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end
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def self.#{sym}
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@@#{sym}
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end
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EOS
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unless options[:instance_reader] == false
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class_eval(<<-EOS, __FILE__, __LINE__ + 1)
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def #{sym}
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@@#{sym}
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end
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EOS
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end
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end
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end
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def cattr_writer(*syms)
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options = syms.extract_options!
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syms.each do |sym|
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class_eval(<<-EOS, __FILE__, __LINE__ + 1)
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unless defined? @@#{sym}
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@@#{sym} = nil
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end
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def self.#{sym}=(obj)
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@@#{sym} = obj
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end
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EOS
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unless options[:instance_writer] == false
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class_eval(<<-EOS, __FILE__, __LINE__ + 1)
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def #{sym}=(obj)
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@@#{sym} = obj
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end
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EOS
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end
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end
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end
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def cattr_accessor(*syms)
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cattr_reader(*syms)
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cattr_writer(*syms)
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end
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end
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