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module Mutant
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class Matcher
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# Abstract base class for matcher that returns method subjects from scope
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class Methods < self
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include AbstractType, Concord::Public.new(:env, :scope)
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2012-11-21 16:28:08 -05:00
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# Enumerate subjects
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#
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# @return [self]
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# if block given
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#
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# @return [Enumerator<Subject>]
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# otherwise
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#
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# @api private
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#
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def each(&block)
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return to_enum unless block_given?
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subjects.each(&block)
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self
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end
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# Return method matcher class
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#
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# @return [Class:Matcher::Method]
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#
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# @api private
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#
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def matcher
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self.class::MATCHER
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end
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# Return methods
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#
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# @return [Enumerable<Method, UnboundMethod>]
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#
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# @api private
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#
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def methods
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candidate_names.each_with_object([]) do |name, methods|
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method = access(name)
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methods << method if method.owner.equal?(candidate_scope)
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end
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end
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memoize :methods
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private
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# Return subjects
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#
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# @return [Array<Subject>]
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#
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# @api private
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#
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def subjects
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methods.map do |method|
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matcher.build(env, scope, method)
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end.flat_map(&:to_a)
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end
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memoize :subjects
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# Return candidate names
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#
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# @param [Object] object
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#
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# @return [Enumerable<Symbol>]
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#
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# @api private
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#
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def candidate_names
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(
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candidate_scope.public_instance_methods(false) +
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candidate_scope.private_instance_methods(false) +
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candidate_scope.protected_instance_methods(false)
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).sort
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end
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# Return candidate scope
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#
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# @return [Class, Module]
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#
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# @api private
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#
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abstract_method :candidate_scope
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# Matcher for singleton methods
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class Singleton < self
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MATCHER = Matcher::Method::Singleton
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private
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# Return method for name
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#
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# @param [Symbol] method_name
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#
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# @return [Method]
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#
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# @api private
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#
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def access(method_name)
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scope.method(method_name)
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end
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# Return candidate scope
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#
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# @return [Class]
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#
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# @api private
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#
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def candidate_scope
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scope.singleton_class
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end
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memoize :candidate_scope, freezer: :noop
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end # Singleton
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# Matcher for instance methods
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class Instance < self
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MATCHER = Matcher::Method::Instance
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private
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2012-12-07 17:27:21 -05:00
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# Return method for name
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#
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# @param [Symbol] method_name
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#
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# @return [UnboundMethod]
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#
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# @api private
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#
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def access(method_name)
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scope.instance_method(method_name)
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end
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# Return candidate scope
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#
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# @return [Class, Module]
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#
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# @api private
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#
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def candidate_scope
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scope
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end
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end # Instance
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end # Methods
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end # Matcher
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end # Mutant
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