Move our paths over to diagnostic items #5393

Manishearth · 2020-03-30T18:02:34Z

Currently we have a ton of hardcoded paths for stdlib types.

Rustc has a way of tagging types for diagnostics via a "diagnostic item" API (rust-lang/rust#60966). We should go through rustc and tag most of these diagnostic items, and replace the hardcoded paths with hardcoded diagnostic item names instead. We can still keep the path framework around for rapid prototyping, but have a comment recommending people switch to diagnostic items whenever possible.

flip1995 · 2020-03-30T18:33:21Z

Marking it as tracking issue and pinning it, since this is probably done in multiple steps.

Make use of more diagnostic items This makes use of some (not all) already existing diagnostic items. Specifically: * 79982a2: `core::mem::uninitialized`, `core::mem::zeroed`, `alloc::sync::Arc`, `alloc::sync::Rc` * 83874d0: `Option` and `Result` cc #5393 changelog: none

@Manishearth

…nishearth More diagnostic items for Clippy usage This adds a couple of more diagnostic items to be used in Clippy. I chose these particular ones because they were the types which we seem to check for the most in Clippy. I'm not sure if the `cfg_attr(not(test))` is needed, but it was also used for `Vec` and a few other types. cc rust-lang/rust-clippy#5393 r? @Manishearth

In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 rust-lang#5393

Use more diagnostic items In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 #5393 --- changelog: none

In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 rust-lang#5393

Use more diagnostic items In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 #5393 --- changelog: none

In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 rust-lang#5393

…=matthiaskrgr Add derive_ord_xor_partial_ord lint Fix #1621 Some remarks: This PR follows the example of the analogous derive_hash_xor_partial_eq lint where possible. I initially tried using the `match_path` function to identify `Ord` implementation like the derive_hash_xor_partial_eq lint currently does, for `Hash` implementations but that didn't work. Specifically, the structs at the top level were getting paths that matched `&["$crate", "cmp", "Ord"]` instead of `&["std", "cmp", "Ord"]`. While trying to figure out what to do instead I saw the comment at the top of [clippy_lints/src/utils/paths.rs](https://github.com/rust-lang/rust-clippy/blob/f5d429cd762423901f946abd800dc2cd91366ccf/clippy_lints/src/utils/paths.rs#L5) that mentioned [this issue](#5393) and suggested to use diagnostic items instead of hardcoded paths whenever possible. I looked for a way to identify `Ord` implementations with diagnostic items, but (possibly because this was the first time I had heard of diagnostic items,) I was unable to find one. Eventually I tried using `get_trait_def_id` and comparing `DefId` values directly and that seems to work as expected. Maybe there's a better approach however? changelog: new lint: derive_ord_xor_partial_ord

…ord-lint, r=matthiaskrgr Add derive_ord_xor_partial_ord lint Fix rust-lang#1621 Some remarks: This PR follows the example of the analogous derive_hash_xor_partial_eq lint where possible. I initially tried using the `match_path` function to identify `Ord` implementation like the derive_hash_xor_partial_eq lint currently does, for `Hash` implementations but that didn't work. Specifically, the structs at the top level were getting paths that matched `&["$crate", "cmp", "Ord"]` instead of `&["std", "cmp", "Ord"]`. While trying to figure out what to do instead I saw the comment at the top of [clippy_lints/src/utils/paths.rs](https://github.com/rust-lang/rust-clippy/blob/f5d429cd762423901f946abd800dc2cd91366ccf/clippy_lints/src/utils/paths.rs#L5) that mentioned [this issue](rust-lang#5393) and suggested to use diagnostic items instead of hardcoded paths whenever possible. I looked for a way to identify `Ord` implementations with diagnostic items, but (possibly because this was the first time I had heard of diagnostic items,) I was unable to find one. Eventually I tried using `get_trait_def_id` and comparing `DefId` values directly and that seems to work as expected. Maybe there's a better approach however? changelog: new lint: derive_ord_xor_partial_ord

tesuji · 2020-09-15T10:19:26Z

Could we use lang_items if possible ?

For example: begin_panic has lang_items but no diagnostic item.
https://github.com/rust-lang/rust/blob/c1589cc819ba7cf289c3ccbab30c215f0a6ba7d7/library/std/src/panicking.rs#L491-L499

flip1995 · 2020-09-15T11:57:03Z

If there is a LangItem we should use it. But this issue is rather about adding #[rustc_diagnostic_item(..)] in rustc and then use it in Clippy. We can do this easier now that Clippy is a subtree in rustc.

migrate paths to newly-added diagnostic items This gets rid of the following paths: * OS_STRING * TO_OWNED * TO_STRING Removes some usages of: * PATH_BUF Per #5393 also removes unneeded `is_ty_param_path` from `clippy_lints::types` and relocates `is_ty_param_lang_item` and `is_ty_param_diagnostic_item` to `clippy_utils`. changelog: none

… r=compiler-errors Add diagnostic item for `std::iter::Enumerate` This adds a diagnostic item for `std::iter::Enumerate`. The change will be used by the clippy `unused_enumerate_index` lint to move away from type paths to using diagnostic items. see: rust-lang/rust-clippy#5393

Rollup merge of rust-lang#124308 - CBSpeir:diagnostic-item-enumerate, r=compiler-errors Add diagnostic item for `std::iter::Enumerate` This adds a diagnostic item for `std::iter::Enumerate`. The change will be used by the clippy `unused_enumerate_index` lint to move away from type paths to using diagnostic items. see: rust-lang/rust-clippy#5393

…er-errors Add diagnostic item for `std::iter::Enumerate` This adds a diagnostic item for `std::iter::Enumerate`. The change will be used by the clippy `unused_enumerate_index` lint to move away from type paths to using diagnostic items. see: rust-lang/rust-clippy#5393

…method, r=scottmcm Add diagnostic item for `std::iter::Iterator::enumerate` Adds a diagnostic item for the `std::iter:Iterator::enumerate` trait method. This change, along with PR rust-lang#124308, will be used by the clippy `unused_enumerate_index` lint to move away from paths to using diagnostic items. see: rust-lang/rust-clippy#5393

Rollup merge of rust-lang#124542 - CBSpeir:diagnostic-item-enumerate-method, r=scottmcm Add diagnostic item for `std::iter::Iterator::enumerate` Adds a diagnostic item for the `std::iter:Iterator::enumerate` trait method. This change, along with PR rust-lang#124308, will be used by the clippy `unused_enumerate_index` lint to move away from paths to using diagnostic items. see: rust-lang/rust-clippy#5393

Remove `dead_code` paths The following paths are `dead_code` and can be removed: ### `clippy_utils::paths::VEC_RESIZE` * Introduced when `vec_resize_to_zero` lint added in PR #5637 * No longer used after commit 8acc4d2 ### `clippy_utils::paths::SLICE_GET` * Introduced when `get_first` lint added in PR #8882 * No longer used after commit a8d80d5 ### `clippy_utils::paths::STR_BYTES` * Introduced when `bytes_count_to_len` lint added in PR #8711 * No longer used after commit ba6a459 When the lints were moved into the `Methods` lint pass, they switched from using paths to diagnostic items. However, the paths were never removed. This occurred in PR #8957. This relates to issue #5393 changelog: none

…hs, r=compiler-errors [Clippy] Swap `manual_retain` to use diagnostic items instead of paths Part of rust-lang/rust-clippy#5393, just a chore.

Rollup merge of rust-lang#130522 - GnomedDev:clippy-manual-retain-paths, r=compiler-errors [Clippy] Swap `manual_retain` to use diagnostic items instead of paths Part of rust-lang/rust-clippy#5393, just a chore.

…ompiler-errors [Clippy] Get rid of most `std` `match_def_path` usage, swap to diagnostic items. Part of rust-lang/rust-clippy#5393. This was going to remove all `std` paths, but `SeekFrom` has issues being cleanly replaced with a diagnostic item as the paths are for variants, which currently cannot be diagnostic items. This also, as a last step, categories the paths to help with future path removals.

Rollup merge of rust-lang#130553 - GnomedDev:remove-clippy-paths, r=compiler-errors [Clippy] Get rid of most `std` `match_def_path` usage, swap to diagnostic items. Part of rust-lang/rust-clippy#5393. This was going to remove all `std` paths, but `SeekFrom` has issues being cleanly replaced with a diagnostic item as the paths are for variants, which currently cannot be diagnostic items. This also, as a last step, categories the paths to help with future path removals.

clarfonthey · 2025-01-27T02:53:55Z

Just commenting here that the issue description links the old path to paths.rs, which does not exist on the latest commit.

Comparing:

xFrednet · 2025-01-27T08:14:16Z

Good catch, I've updated the description. Thank you!

…=compiler-errors add last std diagnostic items for clippy Part of rust-lang/rust-clippy#5393. Add diagnostic item attributes to the items in `std` and `core` where clippy currently uses hardcoded paths (https://github.com/rust-lang/rust-clippy/blob/master/clippy_utils/src/paths.rs).

Rollup merge of rust-lang#137214 - cyrgani:clippy_diagnostic_items, r=compiler-errors add last std diagnostic items for clippy Part of rust-lang/rust-clippy#5393. Add diagnostic item attributes to the items in `std` and `core` where clippy currently uses hardcoded paths (https://github.com/rust-lang/rust-clippy/blob/master/clippy_utils/src/paths.rs).

…-errors add last std diagnostic items for clippy Part of rust-lang/rust-clippy#5393. Add diagnostic item attributes to the items in `std` and `core` where clippy currently uses hardcoded paths (https://github.com/rust-lang/rust-clippy/blob/master/clippy_utils/src/paths.rs).

…=compiler-errors add last std diagnostic items for clippy Part of rust-lang/rust-clippy#5393. Add diagnostic item attributes to the items in `std` and `core` where clippy currently uses hardcoded paths (https://github.com/rust-lang/rust-clippy/blob/master/clippy_utils/src/paths.rs).

Manishearth added E-medium Call for participation: Medium difficulty level problem and requires some initial experience. C-an-interesting-project Category: Interesting projects, that usually are more involved design/code wise. labels Mar 30, 2020

flip1995 added the C-tracking-issue Category: Tracking Issue label Mar 30, 2020

flip1995 pinned this issue Mar 30, 2020

phansch mentioned this issue Apr 10, 2020

Make use of more diagnostic items #5449

Merged

phansch mentioned this issue Apr 22, 2020

More diagnostic items for Clippy usage rust-lang/rust#71414

Merged

phansch added a commit to phansch/rust-clippy that referenced this issue Apr 23, 2020

More diagnostic items

c3acaf3

In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 rust-lang#5393

phansch mentioned this issue Apr 23, 2020

Use more diagnostic items #5509

Merged

bors added a commit that referenced this issue Apr 23, 2020

Auto merge of #5509 - phansch:more-diagnostic-items2, r=matthiaskrgr

855395b

Use more diagnostic items In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 #5393 --- changelog: none

bors added a commit that referenced this issue Apr 23, 2020

Auto merge of #5509 - phansch:more-diagnostic-items2, r=matthiaskrgr

1b7ed5c

Use more diagnostic items In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 #5393 --- changelog: none

phansch added a commit to phansch/rust-clippy that referenced this issue Apr 26, 2020

More diagnostic items

0480ff8

In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 rust-lang#5393

bors added a commit that referenced this issue Apr 26, 2020

Auto merge of #5509 - phansch:more-diagnostic-items2, r=<try>

ae0576a

Use more diagnostic items In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 #5393 --- changelog: none

bors added a commit that referenced this issue Apr 26, 2020

Auto merge of #5509 - phansch:more-diagnostic-items2, r=<try>

90a9e88

Use more diagnostic items In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 #5393 --- changelog: none

bors added a commit that referenced this issue Apr 26, 2020

Auto merge of #5509 - phansch:more-diagnostic-items2, r=matthiaskrgr

5c12f2b

Use more diagnostic items In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 #5393 --- changelog: none

ThibsG pushed a commit to ThibsG/rust-clippy that referenced this issue May 2, 2020

More diagnostic items

69dad2d

In particular for: * `VecDeque` * `String` * `Mutex` * `HashMap` * `HashSet` cc rust-lang/rust#71414 rust-lang#5393

esamudera mentioned this issue Jun 9, 2020

New lint: suggest ptr::read instead of mem::replace(..., uninitialized()) #5695

Merged

Ryan1729 mentioned this issue Jul 27, 2020

Add derive_ord_xor_partial_ord lint #5848

Merged

boxdot mentioned this issue Nov 23, 2020

Add invalid null pointer usage lint. #6192

Closed

anall mentioned this issue Feb 27, 2021

migrate paths to newly-added diagnostic items #6807

Merged

Y-Nak mentioned this issue Mar 12, 2021

Use sym::Iterator instead of paths::ITERATOR #6891

Merged

xFrednet mentioned this issue Jan 14, 2023

Get the ItemId based on a given ast-path rust-marker/marker#93

Closed

CBSpeir mentioned this issue Apr 23, 2024

Add diagnostic item for std::iter::Enumerate rust-lang/rust#124308

Merged

This was referenced Apr 29, 2024

Add diagnostic item for std::iter::Iterator::enumerate rust-lang/rust#124542

Merged

Remove dead_code paths #12743

Merged

This was referenced Sep 18, 2024

[Clippy] Swap manual_retain to use diagnostic items instead of paths rust-lang/rust#130522

Merged

[Clippy] Swap map_entry to use diagnostic items instead of paths rust-lang/rust#130523

Closed

GnomedDev mentioned this issue Sep 19, 2024

[Clippy] Get rid of most std match_def_path usage, swap to diagnostic items. rust-lang/rust#130553

Merged

cyrgani mentioned this issue Feb 18, 2025

add last std diagnostic items for clippy rust-lang/rust#137214

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Move our paths over to diagnostic items #5393

Move our paths over to diagnostic items #5393

Manishearth commented Mar 30, 2020 •

edited by xFrednet

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flip1995 commented Mar 30, 2020

tesuji commented Sep 15, 2020 •

edited

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flip1995 commented Sep 15, 2020

clarfonthey commented Jan 27, 2025

xFrednet commented Jan 27, 2025

Move our paths over to diagnostic items #5393

Move our paths over to diagnostic items #5393

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Manishearth commented Mar 30, 2020 • edited by xFrednet Loading

flip1995 commented Mar 30, 2020

tesuji commented Sep 15, 2020 • edited Loading

flip1995 commented Sep 15, 2020

clarfonthey commented Jan 27, 2025

xFrednet commented Jan 27, 2025

Manishearth commented Mar 30, 2020 •

edited by xFrednet

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tesuji commented Sep 15, 2020 •

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