67 lines
1.3 KiB
Ruby
67 lines
1.3 KiB
Ruby
module Mutant
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# Module to declare abstract methods
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module Abstract
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# Declare abstract instance method
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#
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# @return [self]
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#
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# @api private
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#
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def abstract(*names)
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names.each do |name|
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define_instance_method(name)
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end
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self
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end
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# Declare abstract singleton method
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#
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# @return [self]
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#
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# @api private
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#
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def abstract_singleton(*names)
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names.each do |name|
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define_singleton_method(name)
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end
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self
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end
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private
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# Define abstract method stub on singleton
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#
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# @param [String] name
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#
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# @return [undefined]
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#
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# @api private
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#
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def define_singleton_method(name)
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class_eval(<<-RUBY, __FILE__, __LINE__+1)
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def #{name}(*)
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raise NotImplementedError, "\#{self.name}.\#{__method__} is not implemented"
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end
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RUBY
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end
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# Define abstract method stub on instances
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#
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# @param [String] name
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#
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# @return [undefined]
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#
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# @api private
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#
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def define_instance_method(name)
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class_eval(<<-RUBY, __FILE__, __LINE__+1)
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def #{name}(*)
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raise NotImplementedError, "\#{self.class.name}#\#{__method__} is not implemented"
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end
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RUBY
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end
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end
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end
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