Use `YYYY-MM-DDTHH_MM_SS` as datetime format for ICE dump files
Windows paths do not support `:`, so use a datetime format in ICE dump paths that Windows will accept.
CC #116809, fix#115180.
Remove `IdFunctor` trait.
It's defined in `rustc_data_structures` but is only used in
`rustc_type_ir`. The code is shorter and easier to read if we remove
this layer of abstraction and just do the things directly where they are
needed.
r? `@BoxyUwU`
Implement an internal lint encouraging use of `Span::eq_ctxt`
Adds a new Rustc internal lint that forbids use of `.ctxt() == .ctxt()` for spans, encouraging use of `.eq_ctxt()` instead (see https://github.com/rust-lang/rust/issues/49509).
Also fixed a few violations of the lint in the Rustc codebase (a fun additional way I could test my code). Edit: MIR opt folks I believe that's why you're CC'ed, just a heads up.
Two things I'm not sure about:
1. The way I chose to detect calls to `Span::ctxt`. I know adding diagnostic items to methods is generally discouraged, but after some searching and experimenting I couldn't find anything else that worked, so I went with it. That said, I'm happy to implement something different if there's a better way out there. (For what it's worth, if there is a better way, it might be worth documenting in the rustc-dev-guide, which I'm happy to take care of)
2. The error message for the lint. Ideally it would probably be good to give some context as to why the suggestion is made (e.g. `rustc::default_hash_types` tells the user that it's because of performance), but I don't have that context so I couldn't put it in the error message. Happy to iterate on the error message based on feedback during review.
r? ``@oli-obk``
Add MonoItems and Instance to stable_mir
Also add a few methods to instantiate instances and get an instance definition. We're still missing support to actually monomorphize the instance body.
This is related to https://github.com/rust-lang/project-stable-mir/issues/36
r? ``@oli-obk``
``@oli-obk`` is that what you were thinking? I incorporated ``@bjorn3`` idea of just adding a Shim instance definition in https://github.com/rust-lang/rust/pull/116465.
Special case iterator chain checks for suggestion
When encountering method call chains of `Iterator`, check for trailing `;` in the body of closures passed into `Iterator::map`, as well as calls to `<T as Clone>::clone` when `T` is a type param and `T: !Clone`.
Fix#9082.
Add new simpler and more explicit syntax for check-cfg
<details>
<summary>
Old proposition (before the MCP)
</summary>
This PR adds a new simpler and more explicit syntax for check-cfg. It consist of two new form:
- `exhaustive(names, values)`
- `configure(name, "value1", "value2", ... "valueN")`
The preview forms `names(...)` and `values(...)` have implicit meaning that are not strait-forward. In particular `values(foo)`&`values(bar)` and `names(foo, bar)` are not equivalent which has created [some confusions](https://github.com/rust-lang/rust/pull/98080).
Also the `names()` and `values()` form are not clear either and again created some confusions where peoples believed that `values()`&`values(foo)` could be reduced to just `values(foo)`.
To fix that the two new forms are made to be explicit and simpler. See the table of correspondence:
- `names()` -> `exhaustive(names)`
- `values()` -> `exhaustive(values)`
- `names(foo)` -> `exhaustive(names)`&`configure(foo)`
- `values(foo)` -> `configure(foo)`
- `values(feat, "foo", "bar")` -> `configure(feat, "foo", "bar")`
- `values(foo)`&`values(bar)` -> `configure(foo, bar)`
- `names()`&`values()`&`values(my_cfg)` -> `exhaustive(names, values)`&`configure(my_cfg)`
Another benefits of the new syntax is that it allow for further options (like conditional checking for --cfg, currently always on) without syntax change.
The two previous forms are deprecated and will be removed once cargo and beta rustc have the necessary support.
</details>
This PR is the first part of the implementation of [MCP636 - Simplify and improve explicitness of the check-cfg syntax](https://github.com/rust-lang/compiler-team/issues/636).
## New `cfg` form
It introduces the new [`cfg` form](https://github.com/rust-lang/compiler-team/issues/636) and deprecate the other two:
```
rustc --check-cfg 'cfg(name1, ..., nameN, values("value1", "value2", ... "valueN"))'
```
## Default built-in names and values
It also changes the default for the built-in names and values checking.
- Built-in values checking would always be activated as long as a `--check-cfg` argument is present
- Built-in names checking would always be activated as long as a `--check-cfg` argument is present **unless** if any `cfg(any())` arg is passed
~~**Note: depends on https://github.com/rust-lang/rust/pull/111068 but is reviewable (last two commits)!**~~
Resolve https://github.com/rust-lang/compiler-team/issues/636
r? `@petrochenkov`
It's defined in `rustc_data_structures` but is only used in
`rustc_type_ir`. The code is shorter and easier to read if we remove
this layer of abstraction and just do the things directly where they are
needed.
docs: add Rust logo to more compiler crates
c6e6ecb1af added it to some of the compiler's crates, but avoided adding it to all of them to reduce bit-rot. This commit adds to more.
r? `@GuillaumeGomez`
Use tidy to enforce alphabetical dependency ordering
I get annoyed when dependencies in `Cargo.toml` files are not in alphabetical order. The [style guide](https://github.com/rust-lang/rust/blob/master/src/doc/style-guide/src/cargo.md) agrees with me.
There are ongoing efforts to provide linting/formatting of `Cargo.toml` files, e.g. https://github.com/rust-lang/rustfmt/pull/5240, https://crates.io/crates/cargo-toml-lint, and https://github.com/TimonPost/cargo-toml-format. But it's far from clear what's the right approach.
So this PR does something very simple: it uses the order checking already present in tidy. This allows incremental application of ordering, starting right now, and avoiding the need for any kind of all-at-once conversion.
If we do end up using some more comprehensive `Cargo.toml` linting/formatting solution in the future, the `tidy-alphabetical` lines will be easy to remove.
r? `@wesleywiser`
Fix a performance regression in obligation deduplication.
Commit 8378487 from #114611 changed the location of an obligation deduplication step in `opt_normalize_projection_type`. This meant that deduplication stopped happening on one path where it was still necessary, causing a couple of drastic performance regressions.
This commit moves the deduplication back to the old location. The good news is that #114611 had four commits and 8378487 was of minimal importance, so the perf benefits from that PR remain.
Fixes#116780, #116797.
r? `@compiler-errors`
Commit 8378487 from #114611 changed the location of an obligation
deduplication step in `opt_normalize_projection_type`. This meant that
deduplication stopped happening on one path where it was still
necessary, causing a couple of drastic performance regressions.
This commit moves the deduplication back to the old location. The good
news is that #114611 had four commits and 8378487 was of minimal
importance, so the perf benefits from that PR remain.
Fixes#116780, #116797.
Preserve unicode escapes in format string literals when pretty-printing AST
Fixes#116799
Thanks to `@Nilstrieb` for the pointer to the correct location, that was really helpful for someone unfamiliar with the codebase.
Make `rustc_onunimplemented` export path agnostic
This makes it so that all the matchers that match against paths use the definition path instead of the export path. This removes all duplication around `std`/`alloc`/`core`.
This is not necessarily optimal because we now depend on internal implementation details like `core::ops::control_flow::ControlFlow`, which is not very nice and probably not acceptable for a stable `on_unimplemented`.
An alternative would be to just string-replace normalize away `alloc`/`core` to `std` as a special case, keeping the export paths but making it so that we're still fully standard library flavor agnostic.
Looking at the diff, I'm starting to think that some simple string replacement would go a long way towards fixing the problem of duplication while keeping export paths...
What do you prefer?
Also `@weiznich` for your thoughts about the stable version.
r? compiler-errors
Fix implied outlives check for GAT in RPITIT
We enforce certain `Self: 'lt` bounds for GATs to save space for more sophisticated implied bounds, but those currently operate on the HIR. Code was easily reworked to operate on def-ids so that we can properly let these suggestions propagate through synthetic associated types like RPITITs and AFITs.
r? `@jackh726` or `@aliemjay`
Fixes#116789
coverage: Several small cleanups in `spans`
While investigating the details of coverage span processing, I noticed several opportunities to make the code simpler and clearer.
---
`@rustbot` label +A-code-coverage
Also add a few methods to instantiate instances and get an instance
definition.
We're still missing support to actually monomorphize the instance body.
This makes it so that all the matchers that match against paths use the
definition path instead of the export path. This removes all duplication
around `std`/`alloc`/`core`.
This is not necessarily optimal because we now depend on internal
implementation details like `core::ops::control_flow::ControlFlow`,
which is not very nice and probably not acceptable for a stable
`on_unimplemented`.
An alternative would be to just string-replace normalize away
`alloc`/`core` to `std` as a special case, keeping the export paths but
making it so that we're still fully standard library flavor agnostic.
Remove `DefiningAnchor::Bubble` from opaque wf check
Set the defining anchor to `DefiningAnchor::Bind(parent_def_id)` where `parent_def_id` is the first parent def-id that isn't an opaque.
This "fixes" some of the nested-return-type wf tests. If we *do* want these to be hard-errors for TAITs, we should probably make those error separately from this check (i.e. via some check like the code in the `OPAQUE_HIDDEN_INFERRED_BOUND` lint). The fact that some of these tests fail but not all of them seems kinda coincidental.
r? oli-obk
Suggest trait bounds for used associated type on type param
Fix#101351.
When an associated type on a type parameter is used, and the type parameter isn't constrained by the correct trait, suggest the appropriate trait bound:
```
error[E0220]: associated type `Associated` not found for `T`
--> file.rs:6:15
|
6 | field: T::Associated,
| ^^^^^^^^^^ there is a similarly named associated type `Associated` in the trait `Foo`
|
help: consider restricting type parameter `T`
|
5 | struct Generic<T: Foo> {
| +++++
```
When an associated type on a type parameter has a typo, suggest fixing
it:
```
error[E0220]: associated type `Baa` not found for `T`
--> $DIR/issue-55673.rs:9:8
|
LL | T::Baa: std::fmt::Debug,
| ^^^ there is a similarly named associated type `Bar` in the trait `Foo`
|
help: change the associated type name to use `Bar` from `Foo`
|
LL | T::Bar: std::fmt::Debug,
| ~~~
```
Add `Config::hash_untracked_state` callback
For context, I'm looking to use [late module passes](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_lint/context/struct.LintStore.html#structfield.late_module_passes) in Clippy which unlike regular late passes run incrementally per module
However we have a config file which can change between runs, we need changes to that to invalidate the `lint_mod` query. This PR adds a side channel for us to hash some extra state into `Options` in order to do that
This does not make any changes to Clippy, I plan to do that in a PR to the Clippy repo along with some other required changes
An alternative implementation would be to add a new query to track this state and override the `lint_mod` query in Clippy to first call that
cc `@rust-lang/clippy`
don't UB on dangling ptr deref, instead check inbounds on projections
This implements https://github.com/rust-lang/reference/pull/1387 in Miri. See that PR for what the change is about.
Detecting dangling references in `let x = &...;` is now done by validity checking only, so some tests need to have validity checking enabled. There is no longer inherently a "nodangle" check in evaluating the expression `&*ptr` (aside from the aliasing model).
r? `@oli-obk`
Based on:
- https://github.com/rust-lang/reference/pull/1387
- https://github.com/rust-lang/rust/pull/115524
interpret: clean up AllocBytes
Fixes https://github.com/rust-lang/miri/issues/2836
Nothing has moved here in half a year, so let's just remove these unused stubs -- they need a proper re-design anyway.
r? `@oli-obk`
Interacting with `basic_coverage_blocks` directly makes it easier to satisfy
the borrow checker when mutating `pending_dups` while reading other fields.
