Before:
```
= note: this link partially resolves to the struct `S`
= note: no `fmt` in `S`
```
After:
```
= note: the struct `S` has no field or associated item named `fmt`
```
Look at this beauty:
```rust
error: unresolved link to `S::h`
--> intra-link-errors.rs:51:6
|
51 | /// [type@S::h]
| ^^^^^^^^^ help: to link to the associated function, use its disambiguator: `S::h()`
|
= note: this link resolves to the associated function `h`, which is not in the type namespace
```
Move jointness censoring to proc_macro
Proc-macro API currently exposes jointness in `Punct` tokens. That is,
`+` in `+one` is **non** joint.
Our lexer produces jointness info for all tokens, so we need to censor
it *somewhere*
Previously we did this in a lexer, but it makes more sense to do this
in a proc-macro server.
r? @petrochenkov
inliner: Check for codegen fn attributes compatibility
* Check for target features compatibility
* Check for no_sanitize attribute compatibility
Fixes#76259.
Fix intra-doc links on pub re-exports
Partial fix for https://github.com/rust-lang/rust/issues/76073 - This removes the incorrect error, but doesn't show the documentation anywhere.
r? @GuillaumeGomez
Remove disambiguators from intra doc link text
Closes https://github.com/rust-lang/rust/issues/65354.
r? @Manishearth
The commits are mostly atomic, but there might be some mix between them here and there. I recommend reading 'refactor ItemLink' and 'refactor RenderedLink' on their own though, lots of churn without any logic changes.
Refactor byteorder to std in rustc_middle
Use std::io::{Read, Write} and {to, from}_{le, be}_bytes methods in
order to remove byteorder from librustc_middle's dependency graph.
Add a regression test for issue-72793
Adds a regression test for #72793, which is fixed by #75443. Note that this won't close the issue as the snippet still shows ICE with `-Zmir-opt-level=2`. But it makes sense to add a test anyway.
do not apply DerefMut on union field
This implements the part of [RFC 2514](https://github.com/rust-lang/rfcs/blob/master/text/2514-union-initialization-and-drop.md) about `DerefMut`. Unlike described in the RFC, we only apply this warning specifically when doing `DerefMut` of a `ManuallyDrop` field; that is really the case we are worried about here.
@matthewjasper suggested I patch `convert_place_derefs_to_mutable` and `convert_place_op_to_mutable` for this, but I could not find anything to do in `convert_place_op_to_mutable` and this is sufficient to make the test pass. However, maybe there are some other cases this misses? I have no familiarity with this code.
This is a breaking change *in theory*, if someone used `ManuallyDrop<T>` in a union field and relied on automatic `DerefMut`. But on stable this means `T: Copy`, so the `ManuallyDrop` is rather pointless.
Cc https://github.com/rust-lang/rust/issues/55149
Upgrade Chalk to 0.21
Two commits here. First commit actually does the upgrade. Second commit has some changes to make more tests in compare-mode=chalk pass.
The `PlaceholdersCollector` and `RegionsSubstitutor` bits are bit a hacky, but only insomuch as `ParamsSubstitutor` is. These won't be needed eventually.
r? @nikomatsakis
BTreeMap: introduce marker::ValMut and reserve Mut for unique access
The mutable BTreeMap iterators (apart from `DrainFilter`) are double-ended, meaning they have to rely on a front and a back handle that each represent a reference into the tree. Reserve a type category `marker::ValMut` for them, so that we guarantee that they cannot reach operations on handles with borrow type `marker::Mut`and that these operations can assume unique access to the tree.
Including #75195, benchmarks report no genuine change:
```
benchcmp old new --threshold 5
name old ns/iter new ns/iter diff ns/iter diff % speedup
btree::map::iter_100 3,333 3,023 -310 -9.30% x 1.10
btree::map::range_unbounded_vs_iter 36,624 31,569 -5,055 -13.80% x 1.16
```
r? @Mark-Simulacrum
Respect `-Z proc-macro-backtrace` flag for panics inside libproc_macro
Fixes#76270
Previously, any panic occuring during a call to a libproc_macro method
(e.g. calling `Ident::new` with an invalid identifier) would always
cause an ICE message to be printed.
Disable zlib in LLVM on Haiku
PR #72696 enabled the option LLVM_ENABLE_ZLIB for the LLVM builds. Like NetBSD and aarch64-apple-darwin (see PR #75500), the LLVM build system not explicitly linking to libz on these platforms cause issues. For Haiku, this meant the runtime loader complaining about undefined symbols..
- Preserve suffixes when displaying
- Rename test file to match `intra-link*`
- Remove unnecessary .clone()s
- Improve comments and naming
- Fix more bugs and add tests
- Escape intra-doc link example in public documentation
Tools, tests, and experimenting with MIR-derived coverage counters
Leverages the new mir_dump output file in HTML+CSS (from #76074) to visualize coverage code regions
and the MIR features that they came from (including overlapping spans).
See example below.
The `run-make-fulldeps/instrument-coverage` test has been refactored to maximize test coverage and reduce code duplication. The new tests support testing with and without `-Clink-dead-code`, so Rust coverage can be tested on MSVC (which, currently, only works with `link-dead-code` _disabled_).
New tests validate coverage region generation and coverage reports with multiple counters per function. Starting with a simple `if-else` branch tests, coverage tests for each additional syntax type can be added by simply dropping in a new Rust sample program.
Includes a basic, MIR-block-based implementation of coverage injection,
available via `-Zexperimental-coverage`. This implementation has known
flaws and omissions, but is simple enough to validate the new tools and
tests.
The existing `-Zinstrument-coverage` option currently enables
function-level coverage only, which at least appears to generate
accurate coverage reports at that level.
Experimental coverage is not accurate at this time. When branch coverage
works as intended, the `-Zexperimental-coverage` option should be
removed.
This PR replaces the bulk of PR #75828, with the remaining parts of
that PR distributed among other separate and indentpent PRs.
This PR depends on two of those other PRs: #76002, #76003 and #76074
Rust compiler MCP rust-lang/compiler-team#278
Relevant issue: #34701 - Implement support for LLVMs code coverage
instrumentation
r? @tmandry
FYI: @wesleywiser
