59 lines
1.3 KiB
Ruby
59 lines
1.3 KiB
Ruby
# Extends the module object with module 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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# module AppConfiguration
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# mattr_accessor :google_api_key
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# self.google_api_key = "123456789"
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#
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# mattr_accessor :paypal_url
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# self.paypal_url = "www.sandbox.paypal.com"
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# end
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#
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# AppConfiguration.google_api_key = "overriding the api key!"
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class Module
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def mattr_reader(*syms)
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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__)
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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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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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def mattr_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__)
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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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#{"
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def #{sym}=(obj)
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@@#{sym} = obj
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end
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" unless options[:instance_writer] == false }
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EOS
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end
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end
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def mattr_accessor(*syms)
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mattr_reader(*syms)
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mattr_writer(*syms)
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end
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end
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