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Replace ad-hoc type path shortening logic for recursive mono instantiation errors to use `tcx.short_string()` instead.
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ismailarilik:handle-potential-query-instability-lint-for-rustc-middle, r=oli-obk
Handle `rustc_middle` cases of `rustc::potential_query_instability` lint
This PR removes `#![allow(rustc::potential_query_instability)]` line from [`compiler/rustc_middle/src/lib.rs`](https://github.com/rust-lang/rust/blob/master/compiler/rustc_middle/src/lib.rs#L29) and converts `FxHash{Map,Set}` types into `FxIndex{Map,Set}` to suppress lint errors.
A somewhat tracking issue: https://github.com/rust-lang/rust/issues/84447
r? `@compiler-errors`
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It's a much better name, more consistent with how we name such things.
Also rename `Lifetime::res` as `Lifetime::kind` to match. I suspect this
field used to have the type `LifetimeRes` and then the type was changed
but the field name remained the same.
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Also reduce visibility.
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Rollup of 9 pull requests
Successful merges:
- #136355 (Add `*_value` methods to proc_macro lib)
- #137621 (Add std support to cygwin target)
- #137793 (Stablize anonymous pipe)
- #138341 (std: Mention clone-on-write mutation in Arc<T>)
- #138517 (Improve upvar analysis for deref of child capture)
- #138584 (Update Rust Foundation links in Readme)
- #138586 (Document `#![register_tool]`)
- #138590 (Flatten and simplify some control flow 🫓)
- #138592 (update change entry for #137147)
r? `@ghost`
`@rustbot` modify labels: rollup
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Make it so that every structured error annotated with `#[derive(Diagnostic)]` that has a field of type `Ty<'_>`, the printing of that value into a `String` will look at the thread-local storage `TyCtxt` in order to shorten to a length appropriate with the terminal width. When this happen, the resulting error will have a note with the file where the full type name was written to.
```
error[E0618]: expected function, found `((..., ..., ..., ...), ..., ..., ...)``
--> long.rs:7:5
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6 | fn foo(x: D) { //~ `x` has type `(...
| - `x` has type `((..., ..., ..., ...), ..., ..., ...)`
7 | x(); //~ ERROR expected function, found `(...
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| call expression requires function
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= note: the full name for the type has been written to 'long.long-type-14182675702747116984.txt'
= note: consider using `--verbose` to print the full type name to the console
```
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Provide a new function `listify`, meant to be used in cases similar to `pluralize!`. When you have a slice of arbitrary elements that need to be presented to the user, `listify` allows you to turn that into a list of comma separated strings.
This reduces a lot of redundant logic that happens often in diagnostics.
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Pass in an appropriate `Option<DefId>` in more cases from hir ty lowering.
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there
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```
help: consider restricting type parameter `T` with traits `Copy` and `Trait`
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LL | fn duplicate_custom<T: Copy + Trait>(t: S<T>) -> (S<T>, S<T>) {
| ++++++++++++++
```
```
help: consider restricting type parameter `V` with trait `Copy`
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LL | fn index<'a, K, V: std::marker::Copy>(map: &'a HashMap<K, V>, k: K) -> &'a V {
| +++++++++++++++++++
```
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This test will break when `Step` gets stabilized, but punt until then.
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On nightly, we mention the trait is unstable
```
error[E0277]: the trait bound `T: Unstable` is not satisfied
--> $DIR/unstable-trait-suggestion.rs:13:9
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LL | foo(t)
| --- ^ the trait `Unstable` is not implemented for `T`
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| required by a bound introduced by this call
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note: required by a bound in `foo`
--> $DIR/unstable-trait-suggestion.rs:9:11
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LL | fn foo<T: Unstable>(_: T) {}
| ^^^^^^^^ required by this bound in `foo`
help: consider restricting type parameter `T` but it is an `unstable` trait
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LL | pub fn demo<T: Unstable>(t: T) {
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```
On stable, we don't suggest the trait at all
```
error[E0277]: the trait bound `T: Unstable` is not satisfied
--> $DIR/unstable-trait-suggestion.rs:13:9
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LL | foo(t)
| --- ^ the trait `Unstable` is not implemented for `T`
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| required by a bound introduced by this call
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note: required by a bound in `foo`
--> $DIR/unstable-trait-suggestion.rs:9:11
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LL | fn foo<T: Unstable>(_: T) {}
| ^^^^^^^^ required by this bound in `foo`
```
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- removed extra bits from predicates queries that are no longer needed in the new system
- removed the need for `non_erasable_generics` to take in tcx and DefId, removed unused arguments in callers
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This introduce an additional collection of opaques on HIR, as they can no
longer be listed using the free item list.
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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Fix malformed suggestion for repeated maybe unsized bounds
Fixes #127441
Now when we encounter something like `foo(a : impl ?Sized + ?Sized)`, instead of suggesting removal of both bounds and leaving `foo(a: impl )` behind, we suggest changing the first bound to `Sized` and removing the second bound, resulting in `foo(a: impl Sized)`.
Although the issue was reported for impl trait types, it also occurred with regular param bounds. So if we encounter `foo<T: ?Sized + ?Sized>(a: T)` we now detect that all the bounds are `?Sized` and therefore emit the suggestion to remove the entire predicate `: ?Sized + ?Sized` resulting in `foo<T>(a: T)`.
Lastly, if we encounter a situation where some of the bounds are something other than `?Sized`, then we emit separate removal suggestions for each `?Sized` bound. E.g. if we see `foo(a: impl ?Sized + Bar + ?Sized)` or `foo<T: ?Sized + Bar + ?Sized>(a: T)` we emit suggestions such that the user will be left with `foo(a : impl Bar)` or `foo<T: Bar>(a: T)` respectively.
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```
error[E0283]: type annotations needed
--> $DIR/into-inference-needs-type.rs:12:10
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LL | .into()?;
| ^^^^
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= note: cannot satisfy `_: From<...>`
= note: required for `FilterMap<...>` to implement `Into<_>`
help: try using a fully qualified path to specify the expected types
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LL ~ let list = <FilterMap<Map<std::slice::Iter<'_, &str>, _>, _> as Into<T>>::into(vec
LL | .iter()
LL | .map(|s| s.strip_prefix("t"))
LL ~ .filter_map(Option::Some))?;
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```
Fix #122569.
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Also rename `into_diagnostic_arg` as `into_diag_arg`, and
`NotIntoDiagnosticArg` as `NotInotDiagArg`.
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Much better!
Note that this involves renaming (and updating the value of)
`DIAGNOSTIC_BUILDER` in clippy.
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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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it works when a non-const context that does not enable effects
calls into a const effects-enabled trait. We'd simply suggest the
non-const trait bound in this case consistent to its fallback.
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Because it's almost always static.
This makes `impl IntoDiagnosticArg for DiagnosticArgValue` trivial,
which is nice.
There are a few diagnostics constructed in
`compiler/rustc_mir_build/src/check_unsafety.rs` and
`compiler/rustc_mir_transform/src/errors.rs` that now need symbols
converted to `String` with `to_string` instead of `&str` with `as_str`,
but that' no big deal, and worth it for the simplifications elsewhere.
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