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Expression --+ | PassThrough
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Inherited from |
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(expression) Match the given subexpression. This class should not be used directly. It is meant for generating specialized parsers which read a record at a time. |
internal function used by 'select_names'. Don't call this function. Will likely be removed in future versions.
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internal function for manipulating the leaves of an expression This really needs to be some sort of visit pattern, but I'm not sure the best way to do it. THIS METHOD MAY CHANGE.
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do a deep copy on this Expression tree
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the corresponding pattern string
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the list of group names used by this Expression and its children
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return a list of all groups matching the given tag
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return a list of all features
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