Suggest `.into()` when all other coercion suggestions fail
Also removes some bogus suggestions because we now short-circuit when offering coercion suggestions(instead of, for example, suggesting every one that could possibly apply)
Fixes#102415
Only export `__tls_*` on wasm32-unknown-unknown.
From talking with `@abrown,` we aren't planning to have hosts call these `__tls_*` functions; instead, TLS initialization will be handled transparently within libc. Consequently, these functions don't need to be exported.
Leave them exported on wasm32-unknown-unknown though, as wasm-bindgen does call them.
panic-on-uninit: adjust checks to 0x01-filling
Now that `mem::uninitiailized` actually fills memory with `0x01` (https://github.com/rust-lang/rust/pull/99182), we can make it panic in a few less cases without risking a lot more UB -- which hopefully slightly improves compatibility with some old code, and which might increase the chance that we can check inside arrays in the future.
We detect almost all of these with our lint, so authors of such code should still be warned -- but if this happens deep inside a dependency, the panic can be quite interruptive, so it might be better not to do it when there is no risk of LLVM UB. Therefore, adjust the `might_permit_raw_init` logic to care primarily about LLVM UB. To my knowledge, it actually covers all cases of LLVM UB now.
Fixes https://github.com/rust-lang/rust/issues/66151
Cc ``@5225225``
resolve error when attempting to link a universal library on macOS
Previously attempting to link universal libraries into libraries (but not binaries) would produce an error that "File too small to be an archive". This works around this by invoking `lipo -thin` to extract a library for the target platform when passed a univeral library.
Fixes#55235
It's worth acknowledging that this implementation is kind of a horrible hack. Unfortunately I don't know how to do anything better, hopefully this PR will be a jumping off point.
rustdoc: remove no-op CSS `.code-header { display: block }`
Since 76a3b609d0 converted code headers to real headers, `display: block` is now the default.
Slightly improve no return for returning function error
Fixes#100607
The rationale is that absolute beginners will be slightly confused as to why certain lines of code in a function does not require a semicolon. (I have actually witness a beginner having this confusion). Hence, a slight rationale is added "to return this value", which signals to the user that after removing said semicolon the value is returned resolving that error.
However, if this is not desirable, I welcome any other suggestions. Thanks.
Add `AsFd` implementations for stdio lock types on WASI.
This mirrors the implementations on Unix platforms, and also mirrors the existing `AsRawFd` impls.
This is similar to #100892, but is for the `*Lock` types.
Rollup of 6 pull requests
Successful merges:
- #102241 (Package `rust-docs-json` into nightly components (take 3))
- #102488 (Check generic argument compatibility when projecting assoc ty)
- #102647 (Only allow ~const bounds for traits with #[const_trait])
- #102648 (Add test for #102605)
- #102651 (It's not about types or consts, but the lack of regions)
- #102653 (resolve instance: missing value to `delay_span_bug`)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
It's not about types or consts, but the lack of regions
pulled out of https://github.com/rust-lang/rust/pull/101900 which adds a fourth kind of non-lifetime generic parameter, and the naming of these methods would get ridiculous.
Package `rust-docs-json` into nightly components (take 3)
`dist` creates a `rust-docs-json.tar.xz` tarfile. But build-manifest expected it to be named `rust-docs-json-preview.tar.xz`. Change build-manifest to allow the name without the `-preview` suffix.
I haven't actually tested this :( build-manifest is a pain to run locally.
Previously attempting to link universal libraries into libraries (but not binaries) would produce an error that "File too small to be an archive". This works around this by using `object` to extract a library for the target platform when passed a univeral library.
Fixes#55235
Lint against nested opaque types that don't satisfy associated type bounds
See the test failures for examples of places where this lint would fire.
r? `@oli-obk`
Don't ICE when trying to copy unsized value in const prop
When we have a trivially false where-clause predicate like `Self: Sized` where `Self = dyn Trait`, we sometimes don't throw an error during typeck for an illegal operation such as copying an unsized type.
This, unfortunately, cannot be made into an error (at least not without some migration -- see #95611 for example), but we should at least not ICE, since this function will never actually be reachable from main, for example.
r? `@RalfJung` since I think you added these assertions? but feel free to reassign.
Fixes#102553
Fix in-place collection leak when remaining element destructor panic
Fixes#101628
cc `@the8472`
I went for the drop guard route, placing it immediately before the `forget_allocation_drop_remaining` call and after the comment, as to signal they are closely related.
I also updated the test to check for the leak, though the only change really needed was removing the leak clean up for miri since now that's no longer leaked.
Implement `Ready::into_inner()`
Tracking issue: #101196.
This implements a method to unwrap the value inside a `Ready` outside an async context.
See https://docs.rs/futures/0.3.24/futures/future/struct.Ready.html#method.into_inner for previous work.
This was discussed in [Zulip beforehand](https://rust-lang.zulipchat.com/#narrow/stream/219381-t-libs/topic/.60Ready.3A.3Ainto_inner.28.29.60):
> An example I'm hitting right now:
I have a cross-platform library that provides a functions that returns a `Future`. The only reason why it returns a `Future` is because the WASM platform requires it, but the native doesn't, to make a cross-platform API that is equal for all I just return a `Ready` on the native targets.
>
> Now I would like to expose native-only functions that aren't async, that users can use to avoid having to deal with async when they are targeting native. With `into_inner` that's easily solvable now.
>
> I want to point out that some internal restructuring could be used to solve that problem too, but in this case it's not that simple, the library uses internal traits that return the `Future` already and playing around with that would introduce unnecessary `cfg` in a lot more places. So it is really only a quality-of-life feature.
Move layout_of and friends from rustc_middle to rustc_ty_utils
Breaks up the very large module that is `rustc_middle::ty::layout` by fork-lifting some queries into `rustc_ty_utils::{abi, layout}`.
This does set back `rustc_ty_utils` to having untranslatable diagnostics. I'd like to leave this as a separate task.
Rollup of 7 pull requests
Successful merges:
- #102441 (Suggest unwrap_or_else when a closure is given)
- #102547 (Migrate CSS theme for search results)
- #102567 (Delay evaluating lint primary message until after it would be suppressed)
- #102624 (rustdoc: remove font family CSS on `.rustdoc-toggle summary::before`)
- #102628 (Change the parameter name of From::from to `value`)
- #102637 (Ignore fuchsia on two compiler tests)
- #102639 (Improve spans when splitting multi-char operator tokens for proc macros.)
Failed merges:
- #102496 (Suggest `.into()` when all other coercion suggestions fail)
r? `@ghost`
`@rustbot` modify labels: rollup
Improve spans when splitting multi-char operator tokens for proc macros.
When a two-char (or three-char) operator token is split into single-char operator tokens before being passed to a proc macro, the single-char tokens are given the original span of length two (or three). This PR gives them more accurate spans.
r? `@Aaron1011`
cc `@petrochenkov`
Change the parameter name of From::from to `value`
The `From` trait is currently defined as:
```rust
pub trait From<T>: Sized {
fn from(_: T) -> Self;
}
```
The name of the argument is `_`. I am proposing to change it to `value`, ie.
```rust
pub trait From<T>: Sized {
fn from(value: T) -> Self;
}
```
This would be more consistent with the `TryFrom`, which looks like this:
```rust
pub trait TryFrom<T>: Sized {
type Error;
fn try_from(value: T) -> Result<Self, Self::Error>;
}
```
The reason for this proposal is twofold:
1. Consistency with the rest of the standard library. The `TryFrom` trait uses `value`, and no `From` implementation uses the default name (as it is quite useless).
2. When generating trait implementations with rust-analyzer/IntelliJ, the parameter name is copied, and it always has to be changed.
Optionally, another name like `x` could be used. I only propose `value` for consistency with `TryFrom`.
Changing parameter names is not a breaking change.
Note: this was originally posted as an internals thread [here](https://internals.rust-lang.org/t/change-the-argument-name-of-from-from/17480)
