Thin `AssocItem`
This PR removes a few fields from `AssocItem` that should be easily computed using other queries.
This simplifies some of the metadata decoding.
Add tests for raw-dylib with vectorcall, and fix vectorcall code generation
* Adds tests for using `raw-dylib` (#58713) with `vectorcall`.
* Fixed code generation for `vectorcall` (parameters have to be marked with `InReg`, just like `fastcall`).
* Enabled running the `raw-dylib` `fastcall` tests when using MSVC (since I had to add support in the test for running MSVC-only tests since GCC doesn't support `vectorcall`).
Rollup of 8 pull requests
Successful merges:
- #99340 (Fix ICE in Definitions::create_def)
- #99629 (Improve `cannot move out of` error message)
- #99864 (bootstrap: don't emit warn about duplicated deps with same/different features if some of sets actually empty)
- #99911 (Remove some uses of `guess_head_span`)
- #99976 (Make Rustdoc exit with correct error code when scraping examples from invalid files)
- #100003 (Improve size assertions.)
- #100012 (Avoid `Ty` to `String` conversions)
- #100020 (better error when python is not found in x - issue #99648)
Failed merges:
- #99994 (Replace `guess_head_span` with `opt_span`)
r? `@ghost`
`@rustbot` modify labels: rollup
Improve size assertions.
- For any file with four or more size assertions, move them into a
separate module (as is already done for `hir.rs`).
- Add some more for AST nodes and THIR nodes.
- Put the `hir.rs` ones in alphabetical order.
r? `@lqd`
Fix ICE in Definitions::create_def
`Debug` implementation for `LocalDefId` uses global `Definitions`. Normally it’s ok, but we can’t do it while holding a mutable reference to `Definitions`, since it causes ICE or deadlock (depending on whether `parallel_compiler` is enabled).
This PR effectively copies the `Debug` implementation into the problematic method. I don’t particularly love this solution (since it creates code duplication), but I don’t see any other options.
This issue was discovered when running `rustdoc` with `RUSTDOC_LOG=trace` on the following file:
```rust
pub struct SomeStruct;
fn asdf() {
impl SomeStruct {
pub fn qwop(&self) {
println!("hidden function");
}
}
}
```
I’m not sure how to create a test for this behavior.
Limit symbols exported from proc macros
Only `__rustc_proc_macro_decls_*__` and `rust_metadata_*` need to be
exported for proc macros to work. All other symbols only increase binary
size and have the potential to conflict with symbols from the host
compiler.
Fixes https://github.com/rust-lang/rust/issues/99909Fixes#59998
cc `@eddyb`
Rollup of 7 pull requests
Successful merges:
- #99519 (Remove implicit names and values from `--cfg` in `--check-cfg`)
- #99620 (`-Z location-detail`: provide option to disable all location details)
- #99932 (Fix unwinding on certain platforms when debug assertions are enabled)
- #99973 (Layout things)
- #99980 (Remove more Clean trait implementations)
- #99984 (Fix compat.rs for `cfg(miri)`)
- #99986 (Add wrap suggestions for record variants)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
- For any file with four or more size assertions, move them into a
separate module (as is already done for `hir.rs`).
- Add some more for AST nodes and THIR nodes.
- Put the `hir.rs` ones in alphabetical order.
From 72 bytes to 12 bytes (on x86-64).
There are two parts to this:
- Changing various source code offsets from 64-bit to 32-bit. This is
not a problem because the rest of rustc also uses 32-bit source code
offsets. This means `Token` is no longer `Copy` but this causes no
problems.
- Removing the `RawStrError` from `LiteralKind`. Raw string literal
invalidity is now indicated by a `None` value within
`RawStr`/`RawByteStr`, and the new `validate_raw_str` function can be
used to re-lex an invalid raw string literal to get the `RawStrError`.
There is one very small change in behaviour. Previously, if a raw string
literal matched both the `InvalidStarter` and `TooManyHashes` cases,
the latter would override the former. This has now changed, because
`raw_double_quoted_string` now uses `?` and so returns immediately upon
detecting the `InvalidStarter` case. I think this is a slight
improvement to report the earlier-detected error, and it explains the
change in the `test_too_many_hashes` test.
The commit also removes a couple of comments that refer to #77629 and
say that the size of these types don't affect performance. These
comments are wrong, though the performance effect is small.
Currently we skip deriving `PartialEq::ne` for C-like (fieldless) enums
and empty structs, thus reyling on the default `ne`. This behaviour is
unnecessarily conservative, because the `PartialEq` docs say this:
> Implementations must ensure that eq and ne are consistent with each other:
>
> `a != b` if and only if `!(a == b)` (ensured by the default
> implementation).
This means that the default implementation (`!(a == b)`) is always good
enough. So this commit changes things such that `ne` is never derived.
The motivation for this change is that not deriving `ne` reduces compile
times and binary sizes.
Observable behaviour may change if a user has defined a type `A` with an
inconsistent `PartialEq` and then defines a type `B` that contains an
`A` and also derives `PartialEq`. Such code is already buggy and
preserving bug-for-bug compatibility isn't necessary.
Two side-effects of the change:
- There is only one error message produced for types where `PartialEq`
cannot be derived, instead of two.
- For coverage reports, some warnings about generated `ne` methods not
being executed have disappeared.
Both side-effects seem fine, and possibly preferable.
Fix cloning from a BitSet with a different domain size
The previous implementation incorrectly assumed that the
number of words in a bit set is equal to the domain size.
The new implementation delegates to `Vec::clone_from` which
is specialized for `Copy` elements.
Fixes#99006.
Add wrap suggestions for record variants
This PR adds a suggestions to wrap an expression in a record struct/variant when encountering mismatched types, similarly to a suggestion to wrap expression in a tuple struct that was added before.
An example:
```rust
struct B {
f: u8,
}
enum E {
A(u32),
B { f: u8 },
}
fn main() {
let _: B = 1;
let _: E = 1;
}
```
```text
error[E0308]: mismatched types
--> ./t.rs:11:16
|
11 | let _: B = 1;
| - ^ expected struct `B`, found integer
| |
| expected due to this
|
help: try wrapping the expression in `B`
|
11 | let _: B = B { f: 1 };
| ++++++ +
error[E0308]: mismatched types
--> ./t.rs:12:16
|
12 | let _: E = 1;
| - ^ expected enum `E`, found integer
| |
| expected due to this
|
help: try wrapping the expression in a variant of `E`
|
12 | let _: E = E::A(1);
| +++++ +
12 | let _: E = E::B { f: 1 };
| +++++++++ +
```
r? `@compiler-errors`
Layout things
These two commits are pretty independent, but didn't seem worth doing individual PRs for:
- Always check that size is a multiple of align, even without debug assertions
- Change Layout debug printing to put `variants` last, since it often huge and not usually the part we are most interested in
Cc `@eddyb`
`-Z location-detail`: provide option to disable all location details
As reported [here](https://github.com/rust-lang/rust/pull/89920#issuecomment-1190598924), when I first implemented the `-Z location-detail` flag there was a bug, where passing an empty list was not correctly supported, and instead rejected by the compiler. This PR fixes that such that passing an empty list results in no location details being tracked, as originally specified in https://github.com/rust-lang/rfcs/pull/2091 .
This PR also adds a test case to verify that this option continues to work as intended.
Remove implicit names and values from `--cfg` in `--check-cfg`
This PR remove the implicit names and values from `--cfg` in `--check-cfg` because the behavior is quite surprising but also because it's really easy to inadvertently really on the implicitness and when the `--cfg` is not set anymore to have an unexpected warning from an unexpected condition that pass with the implicitness.
This change in behavior will also enable us to warn when an unexpected `--cfg` is passed, ex: the user wrote `--cfg=unstabl` instead of `--cfg=unstable`. The implementation of the warning will be done in a follow-up PR.
cc `@petrochenkov`
Suggest removing a semicolon and boxing the expressions for if-else
`InferCtxt::suggest_remove_semi_or_return_binding` was not working well, so I fixed it and added a ui test.
