Refactor query forcing
The control flow in those functions was very complex, with several layers of continuations.
I tried to simplify the implementation, while keeping essentially the same logic.
Now, all code paths go through `try_execute_query` for the actual query execution.
Communication with the `dep_graph` and the live caches are the only difference between query getting/ensuring/forcing.
The order of the `where` bounds on auto trait impls changed because
rustdoc currently sorts auto trait `where` bounds based on the `Debug`
output for the bound. Now that the bounds have an actual `Res`, they are
being unintentionally sorted by their `DefId` rather than their path.
So, I had to update a test for the change in ordering of the rendered
bounds.
Rollup of 10 pull requests
Successful merges:
- #87904 (Reword description of automatic impls of `Unsize`.)
- #88147 (Fix non-capturing closure return type coercion)
- #88209 (Improve error message when _ is used for in/inout asm operands)
- #88668 (Change more x64 size checks to not apply to x32.)
- #88733 (Fix ICE for functions with more than 65535 arguments)
- #88757 (Suggest wapping expr in parentheses on invalid unary negation)
- #88779 (Use more accurate spans for "unused delimiter" lint)
- #88830 (Add help for E0463)
- #88849 (don't clone types that are Copy (clippy::clone_on_copy))
- #88850 (don't convert types into identical types)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Fix ICE for functions with more than 65535 arguments
This pull request fixes#88577 by changing the `param_idx` field in the `Param` variant of `WellFormedLoc` from `u16` to `u32`, thus allowing for more than 65,535 arguments in a function. Note that I also added a regression test, but needed to add `// ignore-tidy-filelength` because the test is more than 8000 lines long.
Change more x64 size checks to not apply to x32.
Commit 95e096d6 changed a bunch of size checks already, but more have
been added, so this fixes the new ones the same way: the various size
checks that are conditional on target_arch = "x86_64" were not intended
to apply to x86_64-unknown-linux-gnux32, so add
target_pointer_width = "64" to the conditions.
Fix non-capturing closure return type coercion
Fixes#88097. For the example given there:
```rust
fn peculiar() -> impl Fn(u8) -> u8 {
return |x| x + 1
}
```
which incorrectly reports an error, I noticed something weird in the debug log:
```
DEBUG rustc_typeck::check::coercion coercion::try_find_coercion_lub([closure@test.rs:2:12: 2:21], [closure@test.rs:2:12: 2:21], exprs=1 exprs)
```
Apparently, `try_find_coercion_lub()` thinks that the LUB for two closure types always has to be a function pointer (which explains the `expected closure, found fn pointer` error in #88097). There is one corner case where that isn't true, though — namely, when the two closure types are equal, in which case the trivial LUB is the type itself. This PR fixes this by inserting an explicit check for type equality in `try_find_coercion_lub()`.
Reword description of automatic impls of `Unsize`.
The existing documentation felt a little unhelpfully concise, so this change tries to improve it by using longer sentences, each of which specifies which kinds of types it applies to as early as possible. In particular, the third item starts with “Structs ...” instead of saying “Foo is a struct” later.
Also, the previous list items “Only the last field has a type involving `T`” and “`T` is not part of the type of any other fields” are, as far as I see, redundant with each other, so I removed the latter.
I have no particular knowledge of `Unsize`; I have attempted to leave the meaning entirely unchanged but may have missed a nuance.
Markdown preview of the edited documentation:
> All implementations of `Unsize` are provided automatically by the compiler.
> Those implementations are:
>
> - Arrays `[T; N]` implement `Unsize<[T]>`.
> - Types implementing a trait `Trait` also implement `Unsize<dyn Trait>`.
> - Structs `Foo<..., T, ...>` implement `Unsize<Foo<..., U, ...>>` if all of these conditions
> are met:
> - `T: Unsize<U>`.
> - Only the last field of `Foo` has a type involving `T`.
> - `Bar<T>: Unsize<Bar<U>>`, where `Bar<T>` stands for the actual type of that last field.
rustc: use more correct span data in for loop desugaring
Fixes#82462
Before:
help: consider adding semicolon after the expression so its temporaries are dropped sooner, before the local variables declared by the block are dropped
|
LL | for x in DroppingSlice(&*v).iter(); {
| +
After:
help: consider adding semicolon after the expression so its temporaries are dropped sooner, before the local variables declared by the block are dropped
|
LL | };
| +
This seems like a reasonable fix: since the desugared "expr_drop_temps_mut" contains the entire desugared loop construct, its span should contain the entire loop construct as well.
Now that we encode spans relative to the items, the item's own span is
never actually hashed as part of the HIR.
In consequence, we explicitly include it in the crate hash to avoid
missing cross-crate invalidations.
