Currently for these two errors we go to the effort of switching to a
standard JSON emitter, for no obvious reason, and unlike any other
errors. This behaviour was added for `pretty-json` in #45737, and then
`human-annotate-rs` copied it some time later when it was added.
This commit changes things to just using the requested emitter, which is
simpler and consistent with other errors.
Old output:
```
$ rustc --error-format pretty-json
{"$message_type":"diagnostic","message":"`--error-format=pretty-json` is unstable","code":null,"level":"error","spans":[],"children":[],"rendered":"error: `--error-format=pretty-json` is unstable\n\n"}
$ rustc --error-format human-annotate-rs
{"$message_type":"diagnostic","message":"`--error-format=human-annotate-rs` is unstable","code":null,"level":"error","spans":[],"children":[],"rendered":"error: `--error-format=human-annotate-rs` is unstable\n\n"}
```
New output:
```
$ rustc --error-format pretty-json
{
"$message_type": "diagnostic",
"message": "`--error-format=pretty-json` is unstable",
"code": null,
"level": "error",
"spans": [],
"children": [],
"rendered": "error: `--error-format=pretty-json` is unstable\n\n"
}
$ rustc --error-format human-annotate-rs
error: `--error-format=human-annotate-rs` is unstable
```
This draws a clear distinction between the fields/methods that are needed by
initial span extraction and preprocessing, and those that are needed by the
main "refinement" loop.
Reorder check_item_type diagnostics so they occur next to the corresponding `check_well_formed` diagnostics
The first commit is just a cleanup.
The second commit moves most checks from `check_mod_item_types` into `check_well_formed`, invoking the checks in lockstep per-item instead of iterating over all items twice.
Reevaluate `body.should_skip()` after updating the MIR phase to ensure
that injected MIR is processed correctly.
Update a few custom MIR tests that were ill-formed for the injected
phase.
Rollup of 10 pull requests
Successful merges:
- #118521 (Enable address sanitizer for MSVC targets using INFERASANLIBS linker flag)
- #119026 (std::net::bind using -1 for openbsd which in turn sets it to somaxconn.)
- #119195 (Make named_asm_labels lint not trigger on unicode and trigger on format args)
- #119204 (macro_rules: Less hacky heuristic for using `tt` metavariable spans)
- #119362 (Make `derive(Trait)` suggestion more accurate)
- #119397 (Recover parentheses in range patterns)
- #119417 (Uplift some miscellaneous coroutine-specific machinery into `check_closure`)
- #119539 (Fix typos)
- #119540 (Don't synthesize host effect args inside trait object types)
- #119555 (Add codegen test for RVO on MaybeUninit)
r? `@ghost`
`@rustbot` modify labels: rollup
Make offset_of field parsing use metavariable which handles any spacing
As discussed at and around comments https://github.com/rust-lang/rust/issues/106655#issuecomment-1793485081 and https://github.com/rust-lang/rust/issues/106655#issuecomment-1793774183, the current arguments to offset_of do not accept all the whitespace combinations: `0. 1.1.1` and `0.1.1. 1` are currently treated specially in `tests/ui/offset-of/offset-of-tuple-nested.rs`.
They also do not allow [forwarding individual fields as in](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=444cdf0ec02b99e8fd5fd8d8ecb312ca)
```rust
macro_rules! off {
($a:expr) => {
offset_of!(m::S, 0. $a)
}
}
```
This PR replaces the macro arguments with `($Container:ty, $($fields:expr)+ $(,)?)` which does allow any arrangement of whitespace that I could come up with and the forwarding of fields example above.
This also allows for array indexing in the future, which I think is the last future extension to the syntax suggested in the offset_of RFC.
Tracking issue for offset_of: #106655
``@rustbot`` label F-offset_of
``@est31``
Support reg_addr register class in s390x inline assembly
In s390x, `r0` cannot be used as an address register (it is evaluated as zero in an address context).
Therefore, currently, in assemblies involving memory accesses, `r0` must be [marked as clobbered](1a1155653a/src/arch/s390x.rs (L58)) or [explicitly used to a non-address](1a1155653a/src/arch/s390x.rs (L135)) or explicitly use an address register to prevent `r0` from being allocated to a register for the address.
This patch adds a register class for allocating general-purpose registers, except `r0`, to make it easier to use address registers. (powerpc already has a register class (reg_nonzero) for a similar purpose.)
This is identical to the `a` constraint in LLVM and GCC:
https://llvm.org/docs/LangRef.html#supported-constraint-code-list
> a: A 32, 64, or 128-bit integer address register (excludes R0, which in an address context evaluates as zero).
https://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html
> a
> Address register (general purpose register except r0)
cc ``@uweigand``
r? ``@Amanieu``
custom mir: make it clear what the return block is
Custom MIR recently got support for specifying the "unwind action", so now there's two things coming after the actual call part of `Call` terminators. That's not very self-explaining so I propose we change the syntax to imitate keyword arguments:
```
Call(popped = Vec::pop(v), ReturnTo(drop), UnwindContinue())
```
Also fix some outdated docs and add some docs to `Call` and `Drop`.
StableCompare 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 `StableOrd` 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`.)
Don't synthesize host effect args inside trait object types
While we were indeed emitting an error for `~const` & `const` trait bounds in trait object types, we were still synthesizing host effect args for them.
Since we don't record the original trait bound modifiers for dyn-Trait in `hir::TyKind::TraitObject` (unlike we do for let's say impl-Trait, `hir::TyKind::OpaqueTy`), AstConv just assumes `ty::BoundConstness::NotConst` in `conv_object_ty_poly_trait_ref` which given `<host> dyn ~const NonConstTrait` resulted in us not realizing that `~const` was used on a non-const trait which lead to a failed assertion in the end.
Instead of updating `hir::TyKind::TraitObject` to track this kind of information, just strip the user-provided constness (similar to #119505).
Fixes#119524.
Uplift some miscellaneous coroutine-specific machinery into `check_closure`
This PR uplifts some of the logic in `check_fn` that is specific to checking coroutines, which always flows through `check_closure`.
This is just some miscellaneous clean up that I've wanted to do, especially because I'm poking around this code to make it work for async closures.
Recover parentheses in range patterns
Before:
```rs
match n {
(0).. => (),
_ => ()
}
```
```
error: expected one of `=>`, `if`, or `|`, found `..`
--> src/lib.rs:3:12
|
3 | (0).. => (),
| ^^ expected one of `=>`, `if`, or `|`
```
After:
```
error: range pattern bounds cannot have parentheses
--> main.rs:3:5
|
3 | (0).. => (),
| ^ ^
|
help: remove these parentheses
|
3 - (0).. => (),
3 + 0.. => (),
|
```
This sets the groundwork for #118625, which will extend the recovery to expressions like `(0 + 1)..` where users may tend to add parentheses to avoid dealing with precedence.
---
```@rustbot``` label +A-parser +A-patterns +A-diagnostics
Make `derive(Trait)` suggestion more accurate
Only suggest `derive(PartialEq)` when both LHS and RHS types are the same, otherwise the suggestion is not useful.
macro_rules: Less hacky heuristic for using `tt` metavariable spans
See the big comment on `fn maybe_use_metavar_location` for a more detailed description.
Make named_asm_labels lint not trigger on unicode and trigger on format args
Someone showed me some cursed code that used format args to create named labels, and rustc wasn't linting on that. Additionally while fixing that, I noticed that Unicode alphabetic characters were being used as part of labels, when they are not actually permitted in labels.
r? ```@Amanieu```
Because it's redundant w.r.t. `Diagnostic::is_lint`, which is present
for every diagnostic level.
`struct_lint_level_impl` was the only place that set the `Error` field
to `true`, and it's also the only place that calls
`Diagnostic::is_lint()` to set the `is_lint` field.
