[beta] Do not call check_expr twice in check_compatible
#99397
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r? @jackh726 (rust-highfive has picked a reviewer for you, use r? to override) |
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Jul 18, 2022
| // so I prodded this method and made it pub(super) so I could call it, and it seems to work well. | ||
| let checked_ty = self.check_expr_kind(provided_arg, expectation); | ||
| let already_checked_ty = self.typeck_results.borrow().expr_ty_adjusted_opt(provided_arg); | ||
| let checked_ty = already_checked_ty.unwrap_or_else(|| self.check_expr(provided_arg)); |
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After #98785, we can assume that expr_ty_adjusted_opt called on an arg expression always returns Some, but since that PR is not on beta yet, we cannot -- so only call check_expr if we haven't already evaluated it once.
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I think a new beta nomination won't hurt, but isn't strictly necessary. We should definitely get a fresh review from someone familiar with the code though! |
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@jackh726 is familiar with this code, though feel free to reassign as always. |
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[beta] Beta 1.63 backports * Reference: Revert $$ macro_metavar rust-lang/reference#1192 * Revert "Stabilize $$ in Rust 1.63.0" rust-lang#99435 * rustdoc: avoid inlining items with duplicate `(type, name)` rust-lang#99344 * Do not call `check_expr` twice in `check_compatible` rust-lang#99397
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I took the comments from jackh and pnkfelix as approval. Closing as merged via #99586. |
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This fixes #98894 and #98897 on the beta branch, since my original fix #98785 does not merge cleanly onto beta.
Should I nominate this for beta backport again, since it's basically a different fix compared to the one that was approved? Regardless, it's actually a slightly smaller change than #98785.