51 lines
1.1 KiB
Ruby
51 lines
1.1 KiB
Ruby
module Mutant
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class Mutator
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# Registry for mutators
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module Registry
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# Return registry state
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#
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# @return [Hash]
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#
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# @api private
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#
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def self.registry
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@registry ||= {}
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end
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private_class_method :registry
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# Register mutator class for AST node class
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#
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# @param [Symbol] type
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# @param [Class] mutator_class
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#
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# @api private
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#
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# @return [self]
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#
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def self.register(type, mutator_class)
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raise "duplicate type registration: #{type}" if registry.key?(type)
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registry[type]=mutator_class
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self
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end
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# Lookup mutator class for node
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#
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# @param [Parser::AST::Node] node
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#
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# @return [Class]
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#
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# @raise [ArgumentError]
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# raises argument error when mutator class cannot be found
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#
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# @api private
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#
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def self.lookup(node)
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type = node.type
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registry.fetch(type) do
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raise ArgumentError,"No mutator to handle: #{type.inspect}"
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end
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end
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end # Registry
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end # Mutator
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end # Mutant
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