Rework borrowing suggestions to use Expr instead of just Span
#143742
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In the suggestion machinery for borrowing expressions and types, always use the available obligation `Span` to find the appropriate `Expr` to perform appropriateness checks no the `ExprKind` instead of on the textual snippet corresponding to the `Span`. Unify the logic for the case where `&` *and* `&mut` are appropriate with the logic for only one of those cases. Handle the case when `S::foo()` should have been `<&S>::foo()` (instead of suggesting the prior `&S::foo()`.
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r? @fee1-dead rustbot has assigned @fee1-dead. Use |
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I recommend using "hide whitespace" option in the diff view, as some of the changes are only on the indentation level. |
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r? compiler-errors @bors r+ rollup |
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tgross35
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…iler-errors Rework borrowing suggestions to use `Expr` instead of just `Span` In the suggestion machinery for borrowing expressions and types, always use the available obligation `Span` to find the appropriate `Expr` to perform appropriateness checks no the `ExprKind` instead of on the textual snippet corresponding to the `Span`. (We were already doing this, but only for a subset of cases.) This now better handles situations where parentheses and `<>` are needed for correct syntax (`&(foo + bar)`, `(&foo).bar()`, `<&Foo>::bar()`, etc.). Unify the logic for the case where `&` *and* `&mut` are appropriate with the logic for only one of those cases. (Instead of having two branches for emitting the suggestion, we now have a single one, using `Diag::multipart_suggestions` always.) Handle the case when `S::foo()` should have been `<&S>::foo()` (instead of suggesting the prior `&S::foo()`. Fix rust-lang#143393. Make `Diag::multipart_suggestions` always verbose. CC rust-lang#141973.
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…iler-errors Rework borrowing suggestions to use `Expr` instead of just `Span` In the suggestion machinery for borrowing expressions and types, always use the available obligation `Span` to find the appropriate `Expr` to perform appropriateness checks no the `ExprKind` instead of on the textual snippet corresponding to the `Span`. (We were already doing this, but only for a subset of cases.) This now better handles situations where parentheses and `<>` are needed for correct syntax (`&(foo + bar)`, `(&foo).bar()`, `<&Foo>::bar()`, etc.). Unify the logic for the case where `&` *and* `&mut` are appropriate with the logic for only one of those cases. (Instead of having two branches for emitting the suggestion, we now have a single one, using `Diag::multipart_suggestions` always.) Handle the case when `S::foo()` should have been `<&S>::foo()` (instead of suggesting the prior `&S::foo()`. Fix rust-lang#143393. Make `Diag::multipart_suggestions` always verbose. CC rust-lang#141973.
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Rollup of 8 pull requests Successful merges: - #140136 (Add an aarch64-msvc build running on ARM64 Windows) - #143642 (stdarch subtree update) - #143679 (Preserve the .debug_gdb_scripts section) - #143707 (Fix `--skip-std-check-if-no-download-rustc`) - #143722 (Make some "safe" llvm ops actually sound) - #143728 (Resolve refactor: extraction of `finalize_module_binding` and `single_import_can_define_name`) - #143742 (Rework borrowing suggestions to use `Expr` instead of just `Span`) - #143744 (Properly track the depth when expanding free alias types) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 7 pull requests Successful merges: - #140136 (Add an aarch64-msvc build running on ARM64 Windows) - #143642 (stdarch subtree update) - #143707 (Fix `--skip-std-check-if-no-download-rustc`) - #143722 (Make some "safe" llvm ops actually sound) - #143728 (Resolve refactor: extraction of `finalize_module_binding` and `single_import_can_define_name`) - #143742 (Rework borrowing suggestions to use `Expr` instead of just `Span`) - #143744 (Properly track the depth when expanding free alias types) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of #143742 - estebank:borrow-suggestion, r=compiler-errors Rework borrowing suggestions to use `Expr` instead of just `Span` In the suggestion machinery for borrowing expressions and types, always use the available obligation `Span` to find the appropriate `Expr` to perform appropriateness checks no the `ExprKind` instead of on the textual snippet corresponding to the `Span`. (We were already doing this, but only for a subset of cases.) This now better handles situations where parentheses and `<>` are needed for correct syntax (`&(foo + bar)`, `(&foo).bar()`, `<&Foo>::bar()`, etc.). Unify the logic for the case where `&` *and* `&mut` are appropriate with the logic for only one of those cases. (Instead of having two branches for emitting the suggestion, we now have a single one, using `Diag::multipart_suggestions` always.) Handle the case when `S::foo()` should have been `<&S>::foo()` (instead of suggesting the prior `&S::foo()`. Fix #143393. Make `Diag::multipart_suggestions` always verbose. CC #141973.
Kobzol
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Jul 13, 2025
Rollup of 7 pull requests Successful merges: - rust-lang/rust#140136 (Add an aarch64-msvc build running on ARM64 Windows) - rust-lang/rust#143642 (stdarch subtree update) - rust-lang/rust#143707 (Fix `--skip-std-check-if-no-download-rustc`) - rust-lang/rust#143722 (Make some "safe" llvm ops actually sound) - rust-lang/rust#143728 (Resolve refactor: extraction of `finalize_module_binding` and `single_import_can_define_name`) - rust-lang/rust#143742 (Rework borrowing suggestions to use `Expr` instead of just `Span`) - rust-lang/rust#143744 (Properly track the depth when expanding free alias types) r? `@ghost` `@rustbot` modify labels: rollup
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In the suggestion machinery for borrowing expressions and types, always use the available obligation
Spanto find the appropriateExprto perform appropriateness checks no theExprKindinstead of on the textual snippet corresponding to theSpan. (We were already doing this, but only for a subset of cases.) This now better handles situations where parentheses and<>are needed for correct syntax (&(foo + bar),(&foo).bar(),<&Foo>::bar(), etc.).Unify the logic for the case where
&and&mutare appropriate with the logic for only one of those cases. (Instead of having two branches for emitting the suggestion, we now have a single one, usingDiag::multipart_suggestionsalways.)Handle the case when
S::foo()should have been<&S>::foo()(instead of suggesting the prior&S::foo(). Fix #143393.Make
Diag::multipart_suggestionsalways verbose. CC #141973.