also updated some error messages
removed the code manually checking for `receiver_ty: Deref<Target=self_ty>`, in favour of using autoderef but only doing one iteration. This will cause error messages to be more consistent. Before, a "mismatched method receiver" error would be emitted when `receiver_ty` was valid except for a lifetime parameter, but only when `feature(arbitrary_self_types)` was enabled, and without the feature flag the error would be "uncoercible receiver". Now it emits "mismatched method receiver" in both cases.
This lets you write methods using `self: Rc<Self>`, `self: Arc<Self>`, `self: Pin<&mut Self>`, `self: Pin<Box<Self>`, and other combinations involving `Pin` and another stdlib receiver type, without needing the `arbitrary_self_types`. Other user-created receiver types can be used, but they still require the feature flag to use.
This is implemented by introducing a new trait, `Receiver`, which the method receiver's type must implement if the `arbitrary_self_types` feature is not enabled. To keep composed receiver types such as `&Arc<Self>` unstable, the receiver type is also required to implement `Deref<Target=Self>` when the feature flag is not enabled.
This lets you use `self: Rc<Self>` and `self: Arc<Self>` in stable Rust, which was not allowed previously. It was agreed that they would be stabilized in #55786. `self: Pin<&Self>` and other pinned receiver types do not require the `arbitrary_self_types` feature, but they cannot be used on stable because `Pin` still requires the `pin` feature.
trigger unsized coercions keyed on Sized bounds
This PR causes unsized coercions to not be disabled by `$0: Unsize<dyn
Object>` coercion obligations when we have an `$0: Sized` obligation somewhere.
This should be mostly backwards-compatible, because in these cases not doing the unsize coercion should have caused the `$0: Sized` obligation to fail.
Note that `X: Unsize<dyn Object>` obligations can't fail *as obligations* if `X: Sized` holds, so this still maintains some version of monotonicity (I think that an unsized coercion can't be converted to no coercion by unifying type variables).
Fixes#49593 (unblocking never_type).
r? @eddyb
cc @nikomatsakis
This is done by adding a new `IsJoint` field to `TokenStream::Tree`,
which simplifies a lot of `match` statements. And likewise for
`CursorKind`.
The commit also adds a new method `TokenTree:stream()` which can replace
a choice between `.into()` and `.joint()`.
This commit moves jemalloc to just the rustc binary rather than the
rustc_driver shared library, enusring that it's only used for binaries
that opt-in to it like rustc rather than other binaries using
librustc_driver like rustdoc/rls/etc. This will hopefully address #56980
Rollup of 15 pull requests
Successful merges:
- #56363 (Defactored Bytes::read)
- #56663 (Remove lifetime from Resolver)
- #56689 (add a lint group for lints emitted by rustdoc)
- #56772 (fix issue 54153 by not testing issue-18804 on Windows nor OS X.)
- #56820 (format-related tweaks)
- #56881 (Implement Eq, PartialEq and Hash for atomic::Ordering)
- #56907 (Fix grammar in compiler error for array iterators)
- #56908 (rustc: Don't ICE on usage of two new target features)
- #56910 (Do not point at delim spans for complete correct blocks)
- #56913 (Enable stack probes for UEFI images)
- #56918 (Profiler: simplify total_duration, improve readability)
- #56931 (Update release notes for Rust 1.31.1)
- #56947 (Add targets thumbv7neon-linux-androideabi and thumbv7neon-unknown-linux-gnueabihf)
- #56948 (Update LLVM submodule)
- #56959 (Fix mobile menu rendering collision with tooltip.)
Failed merges:
- #56914 (Ignore ui/target-feature-gate on sparc, sparc64, powerpc, powerpc64 and powerpc64le)
r? @ghost
Add targets thumbv7neon-linux-androideabi and thumbv7neon-unknown-linux-gnueabihf
These two targets enable both thumb-mode and NEON for ARMv7 CPUs.
This another attempt at #49902, which cannot be reopened. Between that PR and this one, some subrepos with C code whose build systems were failing went away.
Enable stack probes for UEFI images
When building UEFI images, we don't link to any CRT libraries so we need to provide a stack probe. Without `__rust_probestack`, the linker looks for `__chkstk` and fails to link if there is a function with large local variables.
r? @alexcrichton
Fix grammar in compiler error for array iterators
This fixes a small grammatical mistake in the message the compiler gives when attempting to iterate directly over an array `arr` without calling `arr.iter()` or borrowing `&arr`.
add a lint group for lints emitted by rustdoc
As rustdoc adds more lints that it specifically manages, it would be nice to be able to lump them all together. This gives us a new group just for that.
I deliberately didn't include `missing_docs` because this is kind of a stepping stone for moving our lints into tool lints (i.e. `#![warn(rustdoc::private_doc_tests)]`), since all of these are specifically emitted by rustdoc. If we want to move `missing_docs` out of the compiler, that's also an option, but it would create a surprising change of behavior.
I also took the chance to rewrite the lint descriptions of these lints to better match the style of the other lints. `>_>`
Defactored Bytes::read
Removed unneeded refactoring of read_one_byte, which removed the unneeded dynamic dispatch (`dyn Read`) used by that function.
This function is only used in one place in the entire Rust codebase; there doesn't seem to be a reason for it to exist (and there especially doesn't seem to be a reason for it to use dynamic dispatch)
