Expand FlattenCompat folds
The former `chain`+`chain`+`fold` implementation looked nice from a
functional-programming perspective, but it introduced unnecessary layers
of abstraction on every `flat_map`/`flatten` fold. It's straightforward
to just fold each part in turn, and this makes it look like a simplified
version of the existing `try_fold` implementation.
For the `iter::bench_flat_map*` benchmarks, I get a large improvement in
`bench_flat_map_chain_sum`, from 1,598,473 ns/iter to 499,889 ns/iter,
and the rest are unchanged.
Moves the lint back from pedantic to style group.
The lint default now only warns on names that are completely capitalized, like "WORD"
and only if the name is longer than 2 chars (so that names where each of the letter represents a word are still distinguishable).
For example: FP (false positive) would still be "valid" and not warned about (but EOF would warn).
A "upper_case_acronyms_aggressive: true/false" config option was added that restores the original lint behaviour to warn
on any kind of camel case name that had more than one capital letter following another capital letter.
Remove is_spotlight field from `Trait`
Small PR, only the last commit is relevant here. The rest is coming from #80883 because I need the `TyCtxt` stored inside `Cache`.
The point is to make ItemKind looks as close as possible to the compiler type so that it makes the switch simpler (which is why I make all these "small" PRs).
r? `@jyn514`
Factor out `clippy_utils` crate
As discussed in https://github.com/rust-lang/rust-clippy/pull/6746, this PR factors out `clippy_lints::utils` as its own crate, `clippy_utils` .
This change will allow `clippy_utils` to be used in lints outside of Clippy.
There is no plan to publish this crate on `crates.io` (see https://github.com/rust-lang/rust-clippy/pull/6746#issuecomment-780747522). Dependent crates should obtain it from GitHub.
changelog: Factor out `clippy_utils` so it can be used by external tools (not published)
README: Add subsection on running Clippy as a rustc wrapper
This is useful for projects that do not use cargo.
changelog: README: Add subsection on running Clippy as a rustc wrapper
- Currently style triggers #81183 so we can't add `#[instrument]` to
this function.
- Having docs above the header is more consistent with the rest of the
code base.
Almost all safety comments are of the form `// SAFETY:`,
so normalize the rest and fix a few of them that should
have been a `/// # Safety` section instead.
Furthermore, make `tidy` only allow the uppercase form. While
currently `tidy` only checks `core`, it is a good idea to prevent
`core` from drifting to non-uppercase comments, so that later
we can start checking `alloc` etc. too.
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
It makes it clearer that the `Namespace` is the one requested by the
disambiguator, rather than the actual namespace of the item. It said
that in the docs before, but now you can tell in the code so it reduces
the potential for confusion.
Make the `Query` enum a simple struct.
A lot of code in `rustc_query_system` is generic over it, only to encode an exceptional error case: query cycles.
The delayed computations are now done at cycle detection.
