Deny use<> for RPITITs
#126746
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Deny use<> for RPITITs
#126746
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oli-obk
reviewed
Jun 24, 2024
| @@ -1594,6 +1594,16 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> { | |||
| }; | |||
| debug!(?captured_lifetimes_to_duplicate); | |||
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| // Deny `use<>` on RPITIT in trait/trait-impl for now. | |||
| if let Some(FnDeclKind::Trait | FnDeclKind::Impl) = fn_kind { | |||
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make this an exhaustive match
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r=me with nit |
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@bors r=oli-obk |
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@bors rollup |
compiler-errors
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Jun 25, 2024
Deny `use<>` for RPITITs Precise capturing `use<>` syntax is currently a no-op on RPITITs, since GATs have no variance, so all captured lifetimes are captured invariantly. We don't currently *need* to support `use<>` on RPITITs, since `use<>` is initially intended for migrating RPIT *overcaptures* from edition 2021->2024, but since RPITITs currently capture all in-scope lifetimes, we'll never need to write `use<>` on an RPITIT. Eventually, though, it would be desirable to support precise capturing on RPITITs, since RPITITs overcapturing by default can be annoying to some folks. But let's separate that (which will likely require some delicate types team work for adding variances to GATs and adjusting the refinement rules) from the stabilization of the feature for edition 2024. r? oli-obk cc `@traviscross` Tracking: - rust-lang#123432
bors
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Jun 25, 2024
…mpiler-errors Rollup of 9 pull requests Successful merges: - rust-lang#126326 (Un-unsafe the `StableOrd` trait) - rust-lang#126618 (Mark assoc tys live only if the corresponding trait is live) - rust-lang#126724 (Fix a span in `parse_ty_bare_fn`.) - rust-lang#126746 (Deny `use<>` for RPITITs) - rust-lang#126868 (not use offset when there is not ends with brace) - rust-lang#126884 (Do not ICE when suggesting dereferencing closure arg) - rust-lang#126915 (Don't suggest awaiting in closure patterns) - rust-lang#126916 (Specify target specific linker for `riscv64gc-gnu` job) - rust-lang#126926 (Tweak a confusing comment in `create_match_candidates`) r? `@ghost` `@rustbot` modify labels: rollup
bors
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…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#126618 (Mark assoc tys live only if the corresponding trait is live) - rust-lang#126746 (Deny `use<>` for RPITITs) - rust-lang#126868 (not use offset when there is not ends with brace) - rust-lang#126884 (Do not ICE when suggesting dereferencing closure arg) - rust-lang#126893 (Eliminate the distinction between PREC_POSTFIX and PREC_PAREN precedence level) - rust-lang#126915 (Don't suggest awaiting in closure patterns) - rust-lang#126943 (De-duplicate all consecutive native libs regardless of their options) r? `@ghost` `@rustbot` modify labels: rollup
bors
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…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#126618 (Mark assoc tys live only if the corresponding trait is live) - rust-lang#126746 (Deny `use<>` for RPITITs) - rust-lang#126868 (not use offset when there is not ends with brace) - rust-lang#126884 (Do not ICE when suggesting dereferencing closure arg) - rust-lang#126893 (Eliminate the distinction between PREC_POSTFIX and PREC_PAREN precedence level) - rust-lang#126915 (Don't suggest awaiting in closure patterns) - rust-lang#126943 (De-duplicate all consecutive native libs regardless of their options) r? `@ghost` `@rustbot` modify labels: rollup
workingjubilee
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Jun 25, 2024
Deny `use<>` for RPITITs Precise capturing `use<>` syntax is currently a no-op on RPITITs, since GATs have no variance, so all captured lifetimes are captured invariantly. We don't currently *need* to support `use<>` on RPITITs, since `use<>` is initially intended for migrating RPIT *overcaptures* from edition 2021->2024, but since RPITITs currently capture all in-scope lifetimes, we'll never need to write `use<>` on an RPITIT. Eventually, though, it would be desirable to support precise capturing on RPITITs, since RPITITs overcapturing by default can be annoying to some folks. But let's separate that (which will likely require some delicate types team work for adding variances to GATs and adjusting the refinement rules) from the stabilization of the feature for edition 2024. r? oli-obk cc ```@traviscross``` Tracking: - rust-lang#123432
bors
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…kingjubilee Rollup of 14 pull requests Successful merges: - rust-lang#126618 (Mark assoc tys live only if the corresponding trait is live) - rust-lang#126746 (Deny `use<>` for RPITITs) - rust-lang#126868 (not use offset when there is not ends with brace) - rust-lang#126884 (Do not ICE when suggesting dereferencing closure arg) - rust-lang#126885 (Remove internal `PathBuf::as_mut_vec`) - rust-lang#126893 (Eliminate the distinction between PREC_POSTFIX and PREC_PAREN precedence level) - rust-lang#126915 (Don't suggest awaiting in closure patterns) - rust-lang#126916 (Specify target specific linker for `riscv64gc-gnu` job) - rust-lang#126926 (Tweak a confusing comment in `create_match_candidates`) - rust-lang#126927 (core: VaArgSafe is an unsafe trait) - rust-lang#126932 (Tweak `FlatPat::new` to avoid a temporarily-invalid state) - rust-lang#126941 (Migrate `run-make/llvm-ident` to `rmake.rs`) - rust-lang#126946 (Add missing slash in `const_eval_select` doc comment) - rust-lang#126947 (Delegation: ast lowering refactor) r? `@ghost` `@rustbot` modify labels: rollup
bors
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Jun 25, 2024
…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#126618 (Mark assoc tys live only if the corresponding trait is live) - rust-lang#126746 (Deny `use<>` for RPITITs) - rust-lang#126868 (not use offset when there is not ends with brace) - rust-lang#126884 (Do not ICE when suggesting dereferencing closure arg) - rust-lang#126893 (Eliminate the distinction between PREC_POSTFIX and PREC_PAREN precedence level) - rust-lang#126915 (Don't suggest awaiting in closure patterns) - rust-lang#126943 (De-duplicate all consecutive native libs regardless of their options) r? `@ghost` `@rustbot` modify labels: rollup
rust-timer
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Jun 26, 2024
Rollup merge of rust-lang#126746 - compiler-errors:no-rpitit, r=oli-obk Deny `use<>` for RPITITs Precise capturing `use<>` syntax is currently a no-op on RPITITs, since GATs have no variance, so all captured lifetimes are captured invariantly. We don't currently *need* to support `use<>` on RPITITs, since `use<>` is initially intended for migrating RPIT *overcaptures* from edition 2021->2024, but since RPITITs currently capture all in-scope lifetimes, we'll never need to write `use<>` on an RPITIT. Eventually, though, it would be desirable to support precise capturing on RPITITs, since RPITITs overcapturing by default can be annoying to some folks. But let's separate that (which will likely require some delicate types team work for adding variances to GATs and adjusting the refinement rules) from the stabilization of the feature for edition 2024. r? oli-obk cc ``@traviscross`` Tracking: - rust-lang#123432
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Precise capturing
use<>syntax is currently a no-op on RPITITs, since GATs have no variance, so all captured lifetimes are captured invariantly.We don't currently need to support
use<>on RPITITs, sinceuse<>is initially intended for migrating RPIT overcaptures from edition 2021->2024, but since RPITITs currently capture all in-scope lifetimes, we'll never need to writeuse<>on an RPITIT.Eventually, though, it would be desirable to support precise capturing on RPITITs, since RPITITs overcapturing by default can be annoying to some folks. But let's separate that (which will likely require some delicate types team work for adding variances to GATs and adjusting the refinement rules) from the stabilization of the feature for edition 2024.
r? oli-obk cc @traviscross
Tracking:
precise_capturingsyntax #123432