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Delayed bug audit
I went through all the calls to `delayed_bug` and `span_delayed_bug` and found a few places where they could be avoided.
r? `@compiler-errors`
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Also change its return type to `Result`.
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remove platform-intrinsics ABI; make SIMD intrinsics be regular intrinsics
`@Amanieu` `@workingjubilee` I don't think there is any reason these need to be "special"? The [original RFC](https://rust-lang.github.io/rfcs/1199-simd-infrastructure.html) indicated eventually making them stable, but I think that is no longer the plan, so seems to me like we can clean this up a bit.
Blocked on https://github.com/rust-lang/stdarch/pull/1538, https://github.com/rust-lang/rust/pull/121542.
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Add `StructurallyRelateAliases` to allow instantiating infer vars with rigid aliases.
Change `instantiate_query_response` to be infallible in the new solver. This requires canonicalization to not hide any information used by the query, so weaken
universe compression. It also modifies `term_is_fully_unconstrained` to allow
region inference variables in a higher universe.
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Use `addr_of!`
As per https://github.com/rust-lang/rust/pull/121303#discussion_r1500954662
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compiler: clippy::complexity fixes
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This makes more sense because most cases then second one is unwind target.
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remove repetitive words
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mark `min_exhaustive_patterns` as complete
This is step 1 and 2 of my [proposal](https://github.com/rust-lang/rust/issues/119612#issuecomment-1918097361) to move `min_exhaustive_patterns` forward. The vast majority of in-tree use cases of `exhaustive_patterns` are covered by `min_exhaustive_patterns`. There are a few cases that still require `exhaustive_patterns` in tests and they're all behind references.
r? ``@ghost``
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Signed-off-by: cui fliter <imcusg@gmail.com>
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region unification: update universe of region vars
necessary for #119106. see inline comment for why this is necessary
r? `@compiler-errors` `@BoxyUwU`
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Provide suggestions through `rustc_confusables` annotations
Help with common API confusion, like asking for `push` when the data structure really has `append`.
```
error[E0599]: no method named `size` found for struct `Vec<{integer}>` in the current scope
--> $DIR/rustc_confusables_std_cases.rs:17:7
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LL | x.size();
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help: you might have meant to use `len`
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LL | x.len();
| ~~~
help: there is a method with a similar name
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LL | x.resize();
| ~~~~~~
```
Fix #59450 (we can open subsequent tickets for specific cases).
Fix #108437:
```
error[E0599]: `Option<{integer}>` is not an iterator
--> f101.rs:3:9
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3 | opt.flat_map(|val| Some(val));
| ^^^^^^^^ `Option<{integer}>` is not an iterator
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::: /home/gh-estebank/rust/library/core/src/option.rs:571:1
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571 | pub enum Option<T> {
| ------------------ doesn't satisfy `Option<{integer}>: Iterator`
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= note: the following trait bounds were not satisfied:
`Option<{integer}>: Iterator`
which is required by `&mut Option<{integer}>: Iterator`
help: you might have meant to use `and_then`
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3 | opt.and_then(|val| Some(val));
| ~~~~~~~~
```
On type error of method call arguments, look at confusables for suggestion. Fix #87212:
```
error[E0308]: mismatched types
--> f101.rs:8:18
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8 | stuff.append(Thing);
| ------ ^^^^^ expected `&mut Vec<Thing>`, found `Thing`
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| arguments to this method are incorrect
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= note: expected mutable reference `&mut Vec<Thing>`
found struct `Thing`
note: method defined here
--> /home/gh-estebank/rust/library/alloc/src/vec/mod.rs:2025:12
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2025 | pub fn append(&mut self, other: &mut Self) {
| ^^^^^^
help: you might have meant to use `push`
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8 | stuff.push(Thing);
| ~~~~
```
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`DefId` to `LocalDefId`
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test that we do not support higher-ranked regions in opaque type inference
We already do all the right checks in `check_opaque_type_parameter_valid`, and we have done so since at least 2 years.
I collected the tests from https://github.com/rust-lang/rust/pull/116935 and https://github.com/rust-lang/rust/pull/100503 and added some more
cc https://github.com/rust-lang/rust/issues/96146
r? `@lcnr`
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Make --verbose imply -Z write-long-types-to-disk=no
When shortening the type it is necessary to take into account the `--verbose` flag, if it is activated, we must always show the entire type and not write it in a file.
Fixes: https://github.com/rust-lang/rust/issues/119130
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Convert `delayed_bug`s to `bug`s.
I have a suspicion that quite a few delayed bug paths are impossible to reach, so I did an experiment.
I converted every `delayed_bug` to a `bug`, ran the full test suite, then converted back every `bug` that was hit. A surprising number were never hit.
This is too dangerous to merge. Increased coverage (fuzzing or a crater run) would likely hit more cases. But it might be useful for people to look at and think about which paths are genuinely unreachable.
r? `@ghost`
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This commit undoes some of the previous commit's mechanical changes,
based on human judgment.
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I have a suspicion that quite a few delayed bug paths are impossible to
reach, so I did an experiment.
I converted every `delayed_bug` to a `bug`, ran the full test suite,
then converted back every `bug` that was hit. A surprising number were
never hit.
The next commit will convert some more back, based on human judgment.
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Expand weak alias types before collecting constrained/referenced late bound regions + refactorings
Fixes #114220.
Follow-up to #120780.
r? `@oli-obk`
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bound regions
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resolve: Scale back unloading of speculatively loaded crates
Fixes https://github.com/rust-lang/rust/issues/120830 and fixes https://github.com/rust-lang/rust/issues/120909 while still unblocking https://github.com/rust-lang/rust/pull/117772.
I cannot reproduce https://github.com/parasyte/crash-rustc as an UI test for some reason, but I tested all the cases linked above manually.
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r=davidtwco
Overhaul `Diagnostic` and `DiagnosticBuilder`
Implements the first part of https://github.com/rust-lang/compiler-team/issues/722, which moves functionality and use away from `Diagnostic`, onto `DiagnosticBuilder`.
Likely follow-ups:
- Move things around, because this PR was written to minimize diff size, so some things end up in sub-optimal places. E.g. `DiagnosticBuilder` has impls in both `diagnostic.rs` and `diagnostic_builder.rs`.
- Rename `Diagnostic` as `DiagInner` and `DiagnosticBuilder` as `Diag`.
r? `@davidtwco`
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When shortening the type it is necessary to take into account the
`--verbose` flag, if it is activated, we must always show the entire
type and not write it in a file.
Fixes: https://github.com/rust-lang/rust/issues/119130
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Allow AST and HIR visitors to return `ControlFlow`
Alternative to #108598.
Since rust-lang/libs-team#187 was rejected, this implements our own version of the `Try` trait (`VisitorResult`) and the `try` macro (`try_visit`). Since this change still allows visitors to return `()`, no changes have been made to the existing ones. They can be done in a separate PR.
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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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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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Add and use a simple extension trait derive macro in the compiler
Adds `#[extension]` to `rustc_macros` for implementing an extension trait. This expands an impl (with an optional visibility) into two parallel trait + impl definitions.
before:
```rust
pub trait Extension {
fn a();
}
impl Extension for () {
fn a() {}
}
```
to:
```rust
#[extension]
pub impl Extension for () {
fn a() {}
}
```
Opted to just implement it by hand because I couldn't figure if there was a "canonical" choice of extension trait macro in the ecosystem. It's really lightweight anyways, and can always be changed.
I'm interested in adding this because I'd like to later split up the large `TypeErrCtxtExt` traits into several different files. This should make it one step easier.
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allow mutable references in const values when they point to no memory
Fixes https://github.com/rust-lang/rust/issues/120450
The second commit is just some drive-by test suite cleanup.
r? `@oli-obk`
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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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