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Remove more out-of-date comments and clarify explanation of visit().
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@ -26,13 +26,7 @@ class ASTVisitor:
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the order during a postorder walk, because it is called _after_
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the order during a postorder walk, because it is called _after_
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the walk has occurred.) The ASTVisitor modifies the visitor
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the walk has occurred.) The ASTVisitor modifies the visitor
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argument by adding a visit method to the visitor; this method can
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argument by adding a visit method to the visitor; this method can
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be used to visit a particular child node.
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be used to visit a child node of arbitrary type.
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XXX The interface for controlling the preorder walk needs to be
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re-considered. The current interface is convenient for visitors
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that mostly let the ASTVisitor do everything. For something like
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a code generator, where you want to walk to occur in a specific
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order, it's a pain to add "return 1" to the end of each method.
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"""
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"""
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VERBOSE = 0
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VERBOSE = 0
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