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11598: feat: Parse destructuring assignment r=Veykril a=ChayimFriedman2 Part of #11532. Lowering is not as easy and may not even be feasible right now as it requires generating identifiers: `(a, b) = (b, a)` is desugared into ```rust { let (<gensym_a>, <gensym_b>) = (b, a); a = <gensym_a>; b = <gensym_b>; } ``` rustc uses hygiene to implement that, but we don't support hygiene yet. However, I think parsing was the main problem as lowering will just affect type inference, and while `{unknown}` is not nice it's much better than a syntax error. I'm still looking for the best way to do lowering, though. Fixes #11454. Co-authored-by: Chayim Refael Friedman <chayimfr@gmail.com> |
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