token source position tracking #794
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dylanscott
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Oct 18, 2024
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| # this is a bit of a hack to avoid problems with the super constructor | ||
| # trying to set these attributes, which we want to compute dynamically | ||
| @pos.setter | ||
| def pos(self, value): ... | ||
| @length.setter | ||
| def length(self, value): ... |
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I initially had the Token constructor do a hasattr(self, 'pos') check before assigning, which I didn't love either. But that approach broke one test where deepcopy was called on a parsed statement, whereas this approach is robust to that case.
It seemed worth making these properties dynamic given that TokenList exposes methods for inserting tokens
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This PR adds tracking of token source positions, accessible with new
posandlengthattributes on theTokenclass and its subclasses. As mentioned in the corresponding issue (#793), we've been using a forked version of sqlparse with this addition to power syntax highlighting in a production system for awhile, and were hoping to upstream the change if it's acceptable.pytest)flake8)