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Including comparisons with root context
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Rollup of 8 pull requests
Successful merges:
- #119151 (Hide foreign `#[doc(hidden)]` paths in import suggestions)
- #119350 (Imply outlives-bounds on lazy type aliases)
- #119354 (Make `negative_bounds` internal & fix some of its issues)
- #119506 (Use `resolutions(()).effective_visiblities` to avoid cycle errors in `report_object_error`)
- #119554 (Fix scoping for let chains in match guards)
- #119563 (Check yield terminator's resume type in borrowck)
- #119589 (cstore: Remove unnecessary locking from `CrateMetadata`)
- #119622 (never patterns: Document behavior of never patterns with macros-by-example)
r? `@ghost`
`@rustbot` modify labels: rollup
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r=compiler-errors
Fix scoping for let chains in match guards
If let guards were previously represented as a different type of guard in HIR and THIR. This meant that let chains in match guards were not handled correctly because they were treated exactly like normal guards.
- Remove `hir::Guard` and `thir::Guard`.
- Make the scoping different between normal guards and if let guards also check for let chains.
closes #118593
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Replace a number of FxHashMaps/Sets with stable-iteration-order alternatives
This PR replaces almost all of the remaining `FxHashMap`s in query results with either `FxIndexMap` or `UnordMap`. The only case that is missing is the `EffectiveVisibilities` struct which turned out to not be straightforward to transform. Once that is done too, we can remove the `HashStable` implementation from `HashMap`.
The first commit adds the `StableCompare` trait which is a companion trait to `StableOrd`. Some types like `Symbol` can be compared in a cross-session stable way, but their `Ord` implementation is not stable. In such cases, a `StableCompare` implementation can be provided to offer a lightweight way for stable sorting. The more heavyweight option is to sort via `ToStableHashKey`, but then sorting needs to have access to a stable hashing context and `ToStableHashKey` can also be expensive as in the case of `Symbol` where it has to allocate a `String`.
The rest of the commits are rather mechanical and don't overlap, so they are best reviewed individually.
Part of [MCP 533](https://github.com/rust-lang/compiler-team/issues/533).
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Cleanup error handlers: round 5
More rustc_errors cleanups. A sequel to https://github.com/rust-lang/rust/pull/119171.
r? ````@compiler-errors````
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Use Expr instead. Use `ExprKind::Let` to represent if let guards.
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Merge `unused_tuple_struct_fields` into `dead_code`
This implicitly upgrades the lint from `allow` to `warn` and places it into the `unused` lint group.
[Discussion on Zulip](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Moving.20.60unused_tuple_struct_fields.60.20from.20allow.20to.20warn)
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`Diagnostic` has 40 methods that return `&mut Self` and could be
considered setters. Four of them have a `set_` prefix. This doesn't seem
necessary for a type that implements the builder pattern. This commit
removes the `set_` prefixes on those four methods.
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This implicitly upgrades the lint from `allow` to `warn` and places it
into the `unused` lint group.
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Also walk bindings created by if-let guards
This change makes the `unused_variables` lint pick up unused bindings created by if-let guards.
Fixes #119383
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Pass DeadItem and lint as consistent group in dead-code.
Fixes https://github.com/rust-lang/rust/issues/119267
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Make closures carry their own ClosureKind
Right now, we use the "`movability`" field of `hir::Closure` to distinguish a closure and a coroutine. This is paired together with the `CoroutineKind`, which is located not in the `hir::Closure`, but the `hir::Body`. This is strange and redundant.
This PR introduces `ClosureKind` with two variants -- `Closure` and `Coroutine`, which is put into `hir::Closure`. The `CoroutineKind` is thus removed from `hir::Body`, and `Option<Movability>` no longer needs to be a stand-in for "is this a closure or a coroutine".
r? eholk
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from movability
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Also add some `dcx` methods to types that wrap `TyCtxt`, for easier
access.
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Fix `EmissionGuarantee`
There are some problems with the `DiagCtxt` API related to `EmissionGuarantee`. This PR fixes them.
r? `@compiler-errors`
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And make all hand-written `IntoDiagnostic` impls generic, by using
`DiagnosticBuilder::new(dcx, level, ...)` instead of e.g.
`dcx.struct_err(...)`.
This means the `create_*` functions are the source of the error level.
This change will let us remove `struct_diagnostic`.
Note: `#[rustc_lint_diagnostics]` is added to `DiagnosticBuilder::new`,
it's necessary to pass diagnostics tests now that it's used in
`into_diagnostic` functions.
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(mostly in rustc_hir and rustc_ast_lowering)
Part of https://github.com/rust-lang/compiler-team/issues/533
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rustc_passes: Enforce `rustc::potential_query_instability` lint
Stop allowing `rustc::potential_query_instability` in all of `rustc_passes` and instead allow it on a case-by-case basis if it is safe. In this case, all instances of the lint are safe to allow.
Part of https://github.com/rust-lang/rust/issues/84447 which is E-help-wanted.
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Renamings:
- find -> opt_hir_node
- get -> hir_node
- find_by_def_id -> opt_hir_node_by_def_id
- get_by_def_id -> hir_node_by_def_id
Fix rebase changes using removed methods
Use `tcx.hir_node_by_def_id()` whenever possible in compiler
Fix clippy errors
Fix compiler
Apply suggestions from code review
Co-authored-by: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Add FIXME for `tcx.hir()` returned type about its removal
Simplify with with `tcx.hir_node_by_def_id`
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Stop allowing `rustc::potential_query_instability` in all of
`rustc_passes` and instead allow it on a case-by-case basis if it is
safe. In this case, all instances of the lint are safe to allow.
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Because the corresponding `Level` is `DelayedBug` and `span_delayed_bug`
follows the pattern used everywhere else: `span_err`, `span_warning`,
etc.
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Add `never_patterns` feature gate
This PR adds the feature gate and most basic parsing for the experimental `never_patterns` feature. See the tracking issue (https://github.com/rust-lang/rust/issues/118155) for details on the experiment.
`@scottmcm` has agreed to be my lang-team liaison for this experiment.
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cleanup
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Currently we always do this:
```
use rustc_fluent_macro::fluent_messages;
...
fluent_messages! { "./example.ftl" }
```
But there is no need, we can just do this everywhere:
```
rustc_fluent_macro::fluent_messages! { "./example.ftl" }
```
which is shorter.
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The `fluent_messages!` macro produces uses of
`crate::{D,Subd}iagnosticMessage`, which means that every crate using
the macro must have this import:
```
use rustc_errors::{DiagnosticMessage, SubdiagnosticMessage};
```
This commit changes the macro to instead use
`rustc_errors::{D,Subd}iagnosticMessage`, which avoids the need for the
imports.
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`x clippy compiler -Aclippy::all -Wclippy::needless_borrow --fix`.
Then I had to remove a few unnecessary parens and muts that were exposed
now.
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Signed-off-by: cui fliter <imcusg@gmail.com>
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