76 lines
1.5 KiB
Ruby
76 lines
1.5 KiB
Ruby
##
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## $Rev: 1 $
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## $Release: 1.0.0 $
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## copyright(c) 2006 kuwata-lab.com all rights reserved.
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##
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##
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## helper to define abstract method in Ruby.
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##
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##
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## example1. (shorter notation)
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##
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## require 'abstract'
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## class Foo
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## abstract_method 'arg1, arg2=""', :method1, :method2, :method3
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## end
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##
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##
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## example2. (RDoc friendly notation)
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##
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## require 'abstract'
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## class Bar
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## # ... method1 description ...
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## def method1(arg1, arg2="")
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## not_implemented
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## end
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##
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## # ... method2 description ...
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## def method2(arg1, arg2="")
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## not_implemented
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## end
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## end
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##
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##
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class Module
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##
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## define abstract methods
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##
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def abstract_method args_str, *method_names
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method_names.each do |name|
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module_eval <<-END
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def #{name}(#{args_str})
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mesg = "class \#{self.class.name} must implement abstract method `#{self.name}##{name}()'."
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#mesg = "\#{self.class.name}##{name}() is not implemented."
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err = NotImplementedError.new mesg
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err.set_backtrace caller()
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raise err
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end
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END
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end
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end
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end
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##
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module Kernel
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##
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## raise NotImplementedError
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##
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def not_implemented #:doc:
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backtrace = caller()
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method_name = (backtrace.shift =~ /`(\w+)'$/) && $1
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mesg = "class #{self.class.name} must implement abstract method '#{method_name}()'."
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#mesg = "#{self.class.name}##{method_name}() is not implemented."
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err = NotImplementedError.new mesg
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err.set_backtrace backtrace
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raise err
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end
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private :not_implemented
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end
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