Add inline assembly support for m68k
I believe this should be correct, to the extent I understand the logic around inline assembly. M68k is fairly straightforward here, other than having separate address registers.
cleanup our region error API
- require `TypeErrCtxt` to always result in an error, closing #108810
- move `resolve_regions_and_report_errors` to the `ObligationCtxt`
- call `process_registered_region_obligations` in `resolve_regions`
- move `resolve_regions` into the `outlives` submodule
- add `#[must_use]` to functions returning lists of errors
r? types
Erase lifetimes above `ty::INNERMOST` when probing ambiguous types
Turns out that `TyCtxt::replace_escaping_bound_vars_uncached` only erases bound vars exactly at `ty::INNERMOST`, and not everything above. This regresses the suggestions for non-lifetime binders, but oh well, I don't really care about those.
Fixes#110052
I'm surprised the compiler doesn't warn about these. It appears having
an `impl` on a struct is enough to avoid a warning about it never being
constructed.
Preserve argument indexes when inlining MIR
We store argument indexes on VarDebugInfo. Unlike the previous method of relying on the variable index to know whether a variable is an argument, this survives MIR inlining.
We also no longer check if var.source_info.scope is the outermost scope. When a function gets inlined, the arguments to the inner function will no longer be in the outermost scope. What we care about though is whether they were in the outermost scope prior to inlining, which we know by whether we assigned an argument index.
Fixes#83217
I considered using `Option<NonZeroU16>` instead of `Option<u16>` to store the index. I didn't because `TypeFoldable` isn't implemented for `NonZeroU16` and because it looks like due to padding, it currently wouldn't make any difference. But I indexed from 1 anyway because (a) it'll make it easier if later it becomes worthwhile to use a `NonZeroU16` and because the arguments were previously indexed from 1, so it made for a smaller change.
This is my first PR on rust-lang/rust, so apologies if I've gotten anything not quite right.
Do not use ImplDerivedObligationCause for inherent impl method error reporting
We were constructing a `TraitRef` out of impl substs, for an *inherent* impl that has no corresponding trait. Instead of doing that, let's construct a meaningful obligation cause code, and instead adjust the error reporting machinery to handle that correctly.
Fixes#110131
cc #106702, which introduced this regression
fix: ensure bad `#[test]` invocs retain correct AST
Fixes#109816
Ensures that a `StmtKind::Item` doesn't get converted into a plain `Item` (causing the ICE from the linked issue) Also unifies the error path a bit.
Replace rustdoc-ui/{c,z}-help tests with a stable run-make test
This make rustdoc resilient to changes in the debugging options while still testing that it matches rustc.
Fixes https://github.com/rust-lang/rust/issues/109391.
Rollup of 8 pull requests
Successful merges:
- #110153 (Fix typos in compiler)
- #110165 (rustdoc: use CSS `overscroll-behavior` instead of JavaScript)
- #110175 (Symbol cleanups)
- #110203 (Remove `..` from return type notation)
- #110205 (rustdoc: make settings radio and checks thicker, less contrast)
- #110222 (Improve the error message when forwarding a matched fragment to another macro)
- #110237 (Split out a separate feature gate for impl trait in associated types)
- #110241 (tidy: Issue an error when UI test limits are too high)
Failed merges:
- #110218 (Remove `ToRegionVid`)
r? `@ghost`
`@rustbot` modify labels: rollup
Split out a separate feature gate for impl trait in associated types
in https://github.com/rust-lang/rust/issues/107645 it was decided that we'll take a new route for type alias impl trait. The exact route isn't clear yet, so while I'm working on implementing some of these proposed changes (e.g. in https://github.com/rust-lang/rust/pull/110010) to be able to experiment with them, I will also work on stabilizing another sugar version first: impl trait in associated types. Similarly I'll look into creating feature gates for impl trait in const/static types.
This PR does nothing but split the feature gate, so that you need to enable a different feature gate for
```rust
impl Trait for Type {
type Assoc = impl SomeTrait;
}
```
than what you need for `type Foo = impl SomeTrait;`
Improve the error message when forwarding a matched fragment to another macro
Adds a link to [Forwarding a matched fragment](https://doc.rust-lang.org/nightly/reference/macros-by-example.html#forwarding-a-matched-fragment) section of the Rust Reference, and suggests a possible fix (using `:tt` instead in the macro definition).
Also removes typos from the original message, it should be `:lifetime` instead of `$lifetime`.
## Motivation
When trying to write a macro which uses a literal in the matcher from the outer macro, like the following one, using a fragment specified that isn't one of `:ident`, `:lifetime`, or `:tt` currently results in a hard to understand message.
```rs
macro_rules! make_t_for_all_tokens {
($($name:literal as $variant:expr,)*) => {
macro_rules! t {
$(
($name) => {
$variant
};
)*
}
};
}
make_t_for_all_tokens! {
"fn" as Token::Fn,
"return" as Token::Return,
"let" as Token::Let,
}
// This creates
//
// macro_rules! t {
// ("fn") => {
// Token::Fn
// };
// ("return") => {
// Token::Return
// };
// ("let") => {
// Token::Let
// };
// }
t!["fn"];
```
### Before
```
error: no rules expected the token `"fn"`
--> src/main.rs:103:10
|
32 | macro_rules! t {
| -------------- when calling this macro
...
103 | t!["fn"];
| ^^^^ no rules expected this token in macro call
|
note: while trying to match `"fn"`
--> src/main.rs:34:6
|
34 | ($name) => {
| ^^^^^
...
58 | / make_t_for_all_tokens! {
59 | | "fn" as Token::Fn,
60 | | "return" as Token::Return,
61 | | "let" as Token::Let,
62 | | }
| |_- in this macro invocation
= note: captured metavariables except for `$tt`, `$ident` and `$lifetime` cannot be compared to other tokens
= note: this error originates in the macro `make_t_for_all_tokens` (in Nightly builds, run with -Z macro-backtrace for more info)
```
### After
```
error: no rules expected the token `"fn"`
--> src/main.rs:103:10
|
32 | macro_rules! t {
| -------------- when calling this macro
...
103 | t!["fn"];
| ^^^^ no rules expected this token in macro call
|
note: while trying to match `"fn"`
--> src/main.rs:34:6
|
34 | ($name) => {
| ^^^^^
...
58 | / make_t_for_all_tokens! {
59 | | "fn" as Token::Fn,
60 | | "return" as Token::Return,
61 | | "let" as Token::Let,
62 | | }
| |_- in this macro invocation
= note: captured metavariables except for `:tt`, `:ident` and `:lifetime` cannot be compared to other tokens
= note: see https://doc.rust-lang.org/nightly/reference/macros-by-example.html#forwarding-a-matched-fragment for more information
= help: try using `:tt` instead in the macro definition
= note: this error originates in the macro `make_t_for_all_tokens` (in Nightly builds, run with -Z macro-backtrace for more info)
```
## Unresolved questions
- Preferrably the suggestion should be attached to the `$name:literal` part of the outer macro, instead of being in the notes section at the end. But I'm not familiar with how the compiler works at all, and I have no idea how to approach this kind of solution.
- `@Nilstrieb` raised a question that the suggestion of adding `:tt` isn't accurate when there's more than `tt` being matched, for example when the input is an `item`.
Remove `..` from return type notation
`@nikomatsakis` and I decided that using `..` in the return-type notation syntax is probably overkill.
r? `@eholk` since you reviewed the last one
Since this is piggybacking now totally off of a pre-existing syntax (parenthesized generics), let me know if you need any explanation of the logic here, since it's a bit more complicated now.
