Rollup of 10 pull requests #122417
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Rollup of 10 pull requests #122417
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Before, the SwitchInt cases were computed in two passes: if the first pass accepted e.g. 0..=5 and then 1, the second pass would not accept 0..=5 anymore because 1 would be listed in the SwitchInt options. Now there's a single pass, so if we sort 0..=5 we must take care to not sort a subsequent 1.
Right now this is just `self.fields.len()` but that'll change in the next commit. `arity` will be useful for the `Debug` impl.
Breaks type metadata identifiers tests into smaller set of tests/files.
This new nightly-only flag can be used to toggle fine-grained flags that control the details of coverage instrumentation. Currently the only supported flag value is `branch` (or `no-branch`), which is a placeholder for upcoming support for branch coverage. Other flag values can be added in the future, to prototype proposed new behaviour, or to enable special non-default behaviour.
pattern analysis: Store field indices in `DeconstructedPat` to avoid virtual wildcards
For a pattern like `Struct { field3: true, .. }`, in pattern analysis we represent it as `Struct { field1: _, field2: _, field3: true, field4: _ }`. This PR makes it so we store `Struct { field3: true, .. }` instead. This means we never have to create fake `_` patterns during lowering.
r? `@compiler-errors`
…on, r=matthewjasper match lowering: don't collect test alternatives ahead of time I'm very happy with this one. Before this, when sorting candidates into the possible test branches, we manually computed `usize` indices to determine in which branch each candidate goes. To make this work we had a first pass that collected the possible alternatives we'd have to deal with, and a second pass that actually sorts the candidates. In this PR, I replace `usize` indices with a dedicated enum. This makes `sort_candidates` easier to follow, and we don't need the first pass anymore. r? `@matthewjasper`
…celinval Add `intrinsic_name` to get plain intrinsic name Add an `intrinsic_name` API to retrieve the plain intrinsic name. The plain name does not include type arguments (as `trimmed_name` does), which is more convenient to match with intrinsic symbols.
…hercote coverage: Remove or migrate all unstable values of `-Cinstrument-coverage` (This PR was substantially overhauled from its original version, which migrated all of the existing unstable values intact.) This PR takes the three nightly-only values that are currently accepted by `-Cinstrument-coverage`, completely removes two of them (`except-unused-functions` and `except-unused-generics`), and migrates the third (`branch`) over to a newly-introduced unstable flag `-Zcoverage-options`. I have a few motivations for wanting to do this: - It's unclear whether anyone actually uses the `except-unused-*` values, so this serves as an opportunity to either remove them, or prompt existing users to object to their removal. - After rust-lang#117199, the stable values of `-Cinstrument-coverage` treat it as a boolean-valued flag, so having nightly-only extra values feels out-of-place. - Nightly-only values also require extra ad-hoc code to make sure they aren't accidentally exposed to stable users. - The new system allows multiple different settings to be toggled independently, which isn't possible in the current single-value system. - The new system makes it easier to introduce new behaviour behind an unstable toggle, and then gather nightly-user feedback before possibly making it the default behaviour for all users. - The new system also gives us a convenient place to put relatively-narrow options that won't ever be the default, but that nightly users might still want access to. - It's likely that we will eventually want to give stable users more fine-grained control over coverage instrumentation. The new flag serves as a prototype of what that stable UI might eventually look like. The `branch` option is a placeholder that currently does nothing. It will be used by rust-lang#122322 to opt into branch coverage instrumentation. --- I see `-Zcoverage-options` as something that will exist more-or-less indefinitely, though individual sub-options might come and go as appropriate. I think there will always be some demand for nightly-only toggles, so I don't see `-Zcoverage-options` itself ever being stable, though we might eventually stabilize something similar to it.
…ttmcm Use `min_exhaustive_patterns` in core & std [`min_exhaustive_patterns`](rust-lang#119612) provides a subset of the functionality of [`exhaustive_patterns`](rust-lang#51085) which is likely to be stabilized much earlier than the full feature. The subset covers all the compiler and std use cases. `compiler/` [already uses it](rust-lang@9dd6eda); this PR switches `std` over.
…ompiler-errors Don't Create `ParamCandidate` When Obligation Contains Errors Fixes rust-lang#121941 I'm not sure if I understand this correctly but this bug was caused by an error type incorrectly matching against `ParamCandidate`. This was introduced by the changes made in rust-lang#72621 (figured using cargo-bisect-rustc). This PR fixes it by skipping `ParamCandidate` generation when an error type is involved. Also, this is similar to rust-lang#73005 but addresses `ParamCandidate` instead of `ImplCandidate`.
…smaller-files, r=compiler-errors CFI: Break tests into smaller files Breaks type metadata identifiers tests into smaller set of tests/files.
…kh726 Enable PR tracking review assignment for rust-lang/rust This flag enables tracking pull requests review assignment to Rust contributors. The URL pointing to the documentation will become real once rust-lang/rust-forge#729 is merged r? `@jackh726` cc: `@Mark-Simulacrum`
Move `Once` implementations to `sys` Part of rust-lang#117276.
Fix ICE in diagnostics for parenthesized type arguments The second time is the charm 🤞 😁 Fixes rust-lang#122345 r? fmease
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…iaskrgr Rollup of 10 pull requests Successful merges: - rust-lang#121820 (pattern analysis: Store field indices in `DeconstructedPat` to avoid virtual wildcards) - rust-lang#121908 (match lowering: don't collect test alternatives ahead of time) - rust-lang#122203 (Add `intrinsic_name` to get plain intrinsic name) - rust-lang#122226 (coverage: Remove or migrate all unstable values of `-Cinstrument-coverage`) - rust-lang#122255 (Use `min_exhaustive_patterns` in core & std) - rust-lang#122360 ( Don't Create `ParamCandidate` When Obligation Contains Errors ) - rust-lang#122375 (CFI: Break tests into smaller files) - rust-lang#122383 (Enable PR tracking review assignment for rust-lang/rust) - rust-lang#122386 (Move `Once` implementations to `sys`) - rust-lang#122400 (Fix ICE in diagnostics for parenthesized type arguments) r? `@ghost` `@rustbot` modify labels: rollup
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Successful merges:
DeconstructedPatto avoid virtual wildcards #121820 (pattern analysis: Store field indices inDeconstructedPatto avoid virtual wildcards)intrinsic_nameto get plain intrinsic name #122203 (Addintrinsic_nameto get plain intrinsic name)-Cinstrument-coverage#122226 (coverage: Remove or migrate all unstable values of-Cinstrument-coverage)min_exhaustive_patternsin core & std #122255 (Usemin_exhaustive_patternsin core & std)ParamCandidateWhen Obligation Contains Errors #122360 ( Don't CreateParamCandidateWhen Obligation Contains Errors )Onceimplementations tosys#122386 (MoveOnceimplementations tosys)r? @ghost
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