implicit `Option`-returning doctests
This distinguishes `Option` and `Result`-returning doctests with implicit `main` method, where the former tests must end with `Some(())`.
Open question: Does this need a feature gate?
r? @GuillaumeGomez
Box::into_vec: use Box::into_raw instead of mem::forget
`Box::into_raw` does, in one step, turn the `Box` into a raw ptr and avoid deallocation. Seems cleaner than separating the two.
Also, `mem::forget` gets the `Box` with a `noalias` argument, but it is not actually correct that this is an exclusive pointer. So a stricter version of Stacked Borrows would complain here. (I can't actually make Stacked Borrows that strict yet though due to other issues.)
Fix linkage diagnostic so it doesn't ICE for external crates
Fix linkage diagnostic so it doesn't ICE for external crates
(As a drive-by improvement, improved the diagnostic to indicate *why* `*const T` or `*mut T` is required.)
Fix#59548Fix#61232
Emit error when trying to use PGO in conjunction with unwinding on Windows.
This PR makes `rustc` emit an error when trying use PGO in conjunction with `-Cpanic=unwind` on Windows, isn't supported by LLVM yet. The error messages points to https://github.com/rust-lang/rust/issues/61002, which documents this known limitation.
ci: Attempt to skip a full rustc compile on dist*
Currently when we're preparing cross-compiled compilers it can take
quite some time because we have to build the compiler itself three
different times. The first is the normal bootstrap, the second is a
second build for the build platform, and the third is the actual target
architecture compiler. The second compiler was historically built
exclusively for procedural macros, and long ago we didn't actually need
it.
This commit tries out avoiding that second compiled compiler, meaning we
only compile rustc for the build platform only once. Some local testing
shows that this is promising, but bors is of course the ultimate test!
Warn on bare_trait_objects by default
The `bare_trait_objects` lint is set to `warn` by default.
Most ui tests have been updated to use `dyn` to avoid creating noise in stderr files.
r? @Centril
cc #54910
strip synstructure consts from compiler docs
Fixes#60150.
Unfortunately this PR depends on the use of the deprecated `--passes` flag in bootstrap to keep the `--strip-hidden` pass while still documenting private items. I've opened #60884 to track stabilization of a new flag that encapsulates this behavior.
r? @QuietMisdreavus
do not print panic message on doctest failures
This PR cleans up rustdoc test output by silently unwinding on failure instead of using `panic!`. It also improves the clarity and consistency of the output on test failure, and adds test cases for failure modes that were previously untested.
This commit fixes a ICE where struct constructors were resulting in an
ICE with const generics. Previously, a `match` in `type_of` did not have
an arm for the `DefKind::Ctor` resolutions and therefore would assume
that the type did not have generics.
Remove LLVM instruction stats and other (obsolete) codegen stats.
Both `-Z count_llvm_insns` and `-Z codegen-stats` are removed, as (AFAIK) they have been of little use in the last few years, especially after the transition to MIR->LLVM codegen.
Other than for the LLVM instruction counts, `-Z codegen-stats` has long been obsoleted anyway.
r? @nagisa cc @rust-lang/compiler
librustc_errors: Move annotation collection to own impl
Extracted from work on #59346. This moves the annotation collection to
the `FileWithAnnotatedLines` impl to allow easier re-use in a separate
EmitterWriter. Even without that new EmitterWriter present, I think it makes
sense to have this as an associated function.
Weak::into_raw
Hello
This is my first shot at #60728. I'd like to consult it a bit before moving further.
The biggest question I have is if this API makes sense. My motivation for it is to be able to store the `Weak` in `AtomicPtr`. For that I don't actually need for the pointer to point to the `T`, any pointer (maybe casted to `usize`) would be good enough, but this mirrors what `Arc` does and could be useful for other things too (like comparing if Arc and Weak point to the same thing without playing with the counts), while some opaque pointer wouldn't.
Some secondary questions, if this is deemed desirable are:
* The weak pointer may be dangling if it is created by `Weak::new()`. It would make sense to treat this as NULL, but that is incompatible with `T: ?Sized` ‒ both `new()` and `ptr::null()` are available only for sized types. The current implementation is therefore also available only for sized `T`s. It would be possible to allow `?Sized` if the API would be `fn into_raw(self) -> Option<NonNull<T>>` and `fn from_raw(NonNull<T>)`, but that's different API than `Arc` has. What would be preferred?
* There's a FIXME in my code about what I suspect could be UB. Is it really UB & how to get the pointer correctly? Is manual offsetting of the pointer the only way?
* Am I missing some other necessary thing around the feature gates and such?
* Is the documentation understandable? I know writing docs is not my strongest skill :-|.
Thinks I'd like to do as part of the PR, but are not yet done:
* Turn the referenced issue into tracking issue for the feature flag.
* Once the `sync::Weak` is considered reasonable, I'd do the equivalent for `rc::Weak`.
* This might call for few more tests than what is currently part of the documentation.
Implement nth_back for RChunks(Exact)(Mut)
Part of #54054.
These implementations may not be optimal because of the use of `self.len()`, but it's quite cheap and simplifies the code a lot.
There's quite some duplication going on here, I wouldn't mind cleaning this up later. A good next step would probably be to add private `split_off_up_to`/`split_off_from` helper methods for slices since their behavior is commonly useful throughout the `Chunks` types.
r? @scottmcm
Add Step::sub_usize
Required for #54054.
I'm aware that the `Step` trait needs a rework, but this still seems like a reasonable addition?
This currently doesn't compile because Chalk contains a type that implement this trait, and this is a breaking change. How can that be fixed?
Implement `iter::Sum` and `iter::Product` for `Option`
This is similar to the existing implementation for `Result`. It will take each item into the accumulator unless a `None` is returned.
I based a lot of this on #38580. From that discussion it didn't seem like this addition would be too controversial or difficult. One thing I still don't understand is picking the values for the `stable` attribute. This is my first non-documentation PR for rust so I am open to any feedback on improvements.
Rollup of 9 pull requests
Successful merges:
- #60742 (Allow const parameters in array sizes to be unified)
- #60756 (Add better tests for hidden lifetimes in impl trait)
- #60928 (Changes the type `mir::Mir` into `mir::Body`)
- #61024 (tests: Centralize proc macros commonly used for testing)
- #61157 (BufReader: In Seek impl, remove extra discard_buffer call)
- #61195 (Special-case `.llvm` in mangler)
- #61202 (Print PermissionExt::mode() in octal in Documentation Examples)
- #61259 (Mailmap fixes)
- #61273 (mention that MaybeUninit is a bit like Option)
Failed merges:
r? @ghost
Print PermissionExt::mode() in octal in Documentation Examples
Printing the file permission mode on unix systems in decimal feels unintuitive. Printing it in octal gives the expected form of e.g. `664`.
tests: Centralize proc macros commonly used for testing
Many proc macros in `ui\proc-macro\auxiliary` were doing same things.
(I added a fair share of those myself.)
Now commonly used macros (empty, identity, etc) are collected in one place - `ui\proc-macro\auxiliary\test-macros.rs`.
Changes the type `mir::Mir` into `mir::Body`
Fixes part 1 of #60229 (previously attempted in #60242).
I stumbled upon the issue and it seems that the previous attempt at solving it was not merged. This is a second try more up-to-date.
The commit should have changed comments as well.
At the time of writting, it passes the tidy and check tool.
