Don't linting `as_conversions` in proc macros
Don't linting `as_conversions` if code was generated by procedural macro.
This PR fixes https://github.com/rust-lang/rust-clippy/issues/9657
I implemented the fix changing the lint code to be a `LateLintPass` in order to be able to use the `is_from_proc_macro` out of the box. If the reviwer thinks that it would be better to do the other way (implementing `WithSearchPat`) just let me know. I might need some help in implementing it for the `ustc_ast::ast::Expr`
changelog: [`as_conversions`] avoiding warnings in macro-generated code
new lint: `large_stack_frames`
This implements a lint that looks for functions that use a lot of stack space.
It uses the MIR because conveniently every temporary gets its own local and I think it maps best to stack space used in a function.
It's probably going to be quite inaccurate in release builds, but at least for debug builds where opts are less aggressive on LLVM's side I think this is accurate "enough".
(This does not work for generic functions yet. Not sure if I should try to get it working in this PR or if it could land without it for now and be added in a followup PR.)
I also put it under the nursery category because this probably needs more work...
changelog: new lint: [`large_stack_frames`]
New lint [`min_ident_chars`]
Closes#10915
This also implements `WithSearchPat` for `Ident`, as I was going to rewrite this as a late lint to optionally ignore fields and/or generics but this was more complex than anticipated
changelog: New lint [`min_ident_chars`]
[#10916](https://github.com/rust-lang/rust-clippy/pull/10916)
Extend `explicit_iter_loop` and `explicit_into_iter_loop`
fixes#1518
Some included cleanups
* Split `for_loop` test into different files for each lint (partially).
* Move handling of some `into_iter` cases from `explicit_into_iter`.
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changelog: Enhancement: [`explicit_iter_loop`]: Now also handles types that implement `IntoIterator`.
[#10416](https://github.com/rust-lang/rust-clippy/pull/10416)
changelog: Sugg: [`explicit_into_iter_loop`]: The suggestion now works on mutable references.
[#10416](https://github.com/rust-lang/rust-clippy/pull/10416)
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Add `needless_if` lint
first off: Sorry about the large diff. Seems a ton of tests do this (understandably so).
this is basically everything I wanted in #10868, while it doesn't lint *all* unnecessary empty blocks, it lints needless if statements; which are basically the crux of the issue (for me) anyway. I've committed code that includes this far too many times 😅 hopefully clippy can help me out soon
closes#10868
changelog: New lint [`needless_if`]
