Make ParseTreeWalker::DEFAULT provide an IterativeParseTreeWalker #1891
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as intended. The existing code intended for ParseTreeWalker::DEFAULT to provide a IterativeParseTreeWalker. However, the implementation initialized ParseTreeWalker::DEFAULT by doing a (value) copy of an IterativeParseTreeWalker, which sliced the object and therefore, unfortunately, transformed it back into a regular ParseTreeWalker. This change implements the desired behavior. Furthermore by making DEFAULT a reference, we are able to preserve the interface to existing code.
mike-lischke
approved these changes
May 31, 2017
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as intended.
The existing code intended for ParseTreeWalker::DEFAULT to provide a
IterativeParseTreeWalker. However, the implementation initialized
ParseTreeWalker::DEFAULT by doing a (value) copy of an
IterativeParseTreeWalker, which sliced the object and therefore,
unfortunately, transformed it back into a regular ParseTreeWalker.
This change implements the desired behavior. Furthermore by making DEFAULT
a reference, we are able to preserve the interface to existing code.