54 lines
1 KiB
Ruby
54 lines
1 KiB
Ruby
module Morpher
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class Compiler
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class Preprocessor
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# Abstract preprocessor emitter
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class Emitter < Compiler::Emitter
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include Registry, Concord.new(:preprocessor, :node)
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# Return output
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#
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# @return [AST::Node]
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#
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# @api private
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#
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def output
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validate_node
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processed_node
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end
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memoize :output
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private
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# Visit node
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#
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# @param [Node] node
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# original untransformed node
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#
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# @return [Node]
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# transformed node
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#
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# @api private
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#
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def visit(node)
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preprocessor.call(node)
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end
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# Validate node
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#
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# @return [undefined]
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# if successful
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#
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# @raise [Error]
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# otherwise
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#
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# @api private
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#
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def validate_node
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assert_children_amount(named_children.length)
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end
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end # Emitter
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end # Preprocessor
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end # Compiler
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end # Morpher
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