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