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Noticed these while doing something else. There's no practical change, but it's preferable to use `DUMMY_SP` as little as possible, particularly when we have perfectlly useful `Span`s available.
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There are lots of functions that modify a diagnostic. This can be via a
`&mut Diagnostic` or a `&mut DiagnosticBuilder`, because the latter type
wraps the former and impls `DerefMut`.
This commit converts all the `&mut Diagnostic` occurrences to `&mut
DiagnosticBuilder`. This is a step towards greatly simplifying
`Diagnostic`. Some of the relevant function are made generic, because
they deal with both errors and warnings. No function bodies are changed,
because all the modifier methods are available on both `Diagnostic` and
`DiagnosticBuilder`.
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Add help to `hir_analysis_unrecognized_intrinsic_function`
To help remind forgetful people like me what step they forgot.
(If this just ICE'd, https://github.com/rust-lang/compiler-team/issues/620 style, the stack trace would point me here, but since there's a "nice" error that information is lost.)
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Tracking import use types for more accurate redundant import checking
fixes #117448
By tracking import use types to check whether it is scope uses or the other situations like module-relative uses, we can do more accurate redundant import checking.
For example unnecessary imports in std::prelude that can be eliminated:
```rust
use std::option::Option::Some;//~ WARNING the item `Some` is imported redundantly
use std::option::Option::None; //~ WARNING the item `None` is imported redundantly
```
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situations like module-relative uses, we can do more accurate redundant import checking.
fixes #117448
For example unnecessary imports in std::prelude that can be eliminated:
```rust
use std::option::Option::Some;//~ WARNING the item `Some` is imported redundantly
use std::option::Option::None; //~ WARNING the item `None` is imported redundantly
```
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Improve wording of `static_mut_ref`
Close #120964
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To help remind forgetful people like me what step they forgot.
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Rollup of 7 pull requests
Successful merges:
- #120526 (rustdoc: Correctly handle long crate names on mobile)
- #121100 (Detect when method call on argument could be removed to fulfill failed trait bound)
- #121160 (rustdoc: fix and refactor HTML rendering a bit)
- #121198 (Add more checks for `unnamed_fields` during HIR analysis)
- #121218 (Fix missing trait impls for type in rustc docs)
- #121221 (AstConv: Refactor lowering of associated item bindings a bit)
- #121237 (Use better heuristic for printing Cargo specific diagnostics)
r? `@ghost`
`@rustbot` modify labels: rollup
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r=compiler-errors
AstConv: Refactor lowering of associated item bindings a bit
Split off from #119385 as discussed, namely the first two commits (modulo one `FIXME` getting turned into a `NOTE`).
The second commit removes `astconv::ConvertedBinding{,Kind}` in favor of `hir::TypeBinding{,Kind}`. The former was a — in my opinion — super useless intermediary. As you can tell from the diff, its removal shaves off some code. Furthermore, yeeting it will make it easier to implement the type resolution fixes in #119385.
Nothing in this PR should have any semantic effect.
r? `@compiler-errors`
<sub>**Addendum** as in #118668: What I call “associated item bindings” are commonly referred to as “type bindings” for historical reasons. Nowadays, “type bindings” include assoc type bindings, assoc const bindings and RTN (return type notation) which is why I prefer not to use this outdated term.</sub>
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Properly deal with weak alias types as self types of impls
Fixes #114216.
Fixes #116100.
Not super happy about the two ad hoc “normalization” implementations for weak alias types:
1. In `inherent_impls`: The “peeling”, normalization to [“WHNF”][whnf]: Semantically that's exactly what we want (neither proper normalization nor shallow normalization would be correct here). Basically a weak alias type is “nominal” (well...^^) if the WHNF is nominal. [#97974](https://github.com/rust-lang/rust/pull/97974) followed the same approach.
2. In `constrained_generic_params`: Generic parameters are constrained by a weak alias type if the corresp. “normalized” type constrains them (where we only normalize *weak* alias types not arbitrary ones). Weak alias types are injective if the corresp. “normalized” type is injective.
Both have ad hoc overflow detection mechanisms.
**Coherence** is handled in #117164.
r? `@oli-obk` or types
[whnf]: https://en.wikipedia.org/wiki/Lambda_calculus_definition#Weak_head_normal_form
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Rename `static_mut_ref` lint to `static_mut_refs`.
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Give some intrinsics fallback bodies
cc #93145
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Implement intrinsics with fallback bodies
fixes #93145 (though we can port many more intrinsics)
cc #63585
The way this works is that the backend logic for generating custom code for intrinsics has been made fallible. The only failure path is "this intrinsic is unknown". The `Instance` (that was `InstanceDef::Intrinsic`) then gets converted to `InstanceDef::Item`, which represents the fallback body. A regular function call to that body is then codegenned. This is currently implemented for
* codegen_ssa (so llvm and gcc)
* codegen_cranelift
other backends will need to adjust, but they can just keep doing what they were doing if they prefer (though adding new intrinsics to the compiler will then require them to implement them, instead of getting the fallback body).
cc `@scottmcm` `@WaffleLapkin`
### todo
* [ ] miri support
* [x] default intrinsic name to name of function instead of requiring it to be specified in attribute
* [x] make sure that the bodies are always available (must be collected for metadata)
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Use generic `NonZero` internally.
Tracking issue: https://github.com/rust-lang/rust/issues/120257
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Rollup of 8 pull requests
Successful merges:
- #120449 (Document requirements for unsized {Rc,Arc}::from_raw)
- #120505 (Fix BTreeMap's Cursor::remove_{next,prev})
- #120672 (std::thread update freebsd stack guard handling.)
- #121088 (Implicitly enable evex512 if avx512 is enabled)
- #121104 (Ignore unsized types when trying to determine the size of the original type)
- #121107 (Fix msg for verbose suggestions with confusable capitalization)
- #121113 (Continue compilation even if inherent impl checks fail)
- #121120 (Add `ErrorGuaranteed` to `ast::LitKind::Err`, `token::LitKind::Err`.)
r? `@ghost`
`@rustbot` modify labels: rollup
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Clean up potential_query_instability with FxIndexMap and UnordMap
From https://github.com/rust-lang/rust/pull/120485#issuecomment-1916437191
r? `@michaelwoerister`
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Continue compilation after check_mod_type_wf errors
The ICEs fixed here were probably reachable through const eval gymnastics before, but now they are easily reachable without that, too.
The new errors are often bugfixes, where useful errors were missing, because they were reported after the early abort. In other cases sometimes they are just duplication of already emitted errors, which won't be user-visible due to deduplication.
fixes https://github.com/rust-lang/rust/issues/120860
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Use fewer delayed bugs.
For some cases where it's clear that an error has already occurred, e.g.:
- there's a comment stating exactly that, or
- things like HIR lowering, where we are lowering an error kind
The commit also tweaks some comments around delayed bug sites.
r? `@oli-obk`
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Be less confident when `dyn` suggestion is not checked for object safety
#120275 no longer checks bare traits for object safety when making a `dyn` suggestion on Rust < 2021. In this case, qualify the suggestion with a note that the trait must be object safe, to prevent user confusion as seen in #116434
r? ```@fmease```
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For some cases where it's clear that an error has already occurred,
e.g.:
- there's a comment stating exactly that, or
- things like HIR lowering, where we are lowering an error kind
The commit also tweaks some comments around delayed bug sites.
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Fully stop using the HIR in trait impl checks
At least I hope I found all happy path usages. I'll need to check if I can figure out a way to make queries declare that they don't access the HIR except in error paths
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`swap` has been deprecated in favour of `swap_remove` - the behaviour
is the same though.
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the header
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This may be a small performance boost as we have to hash less to lookup the value
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Merge `impl_polarity` and `impl_trait_ref` queries
Hopefully this is perf neutral. I want to finish https://github.com/rust-lang/rust/pull/120835 and stop using the HIR in `coherent_trait`, which should then give us a perf improvement.
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Dejargonize `subst`
In favor of #110793, replace almost every occurence of `subst` and `substitution` from rustc codes, but they still remains in subtrees under `src/tools/` like clippy and test codes (I'd like to replace them after this)
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Turn `is_val_statically_known` into such an intrinsic to demonstrate. It is perfectly safe to call after all.
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