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Suggestion for incorrect repr use #61286

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estebank opened this issue May 28, 2019 · 0 comments
Open

Suggestion for incorrect repr use #61286

estebank opened this issue May 28, 2019 · 0 comments
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A-diagnostics Area: Messages for errors, warnings, and lints A-suggestion-diagnostics Area: Suggestions generated by the compiler applied by `cargo fix`. C-enhancement Category: An issue proposing an enhancement or a PR with one. D-papercut Diagnostics: An error or lint that needs small tweaks. P-low Low priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@estebank
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estebank commented May 28, 2019 •
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When encountering #[repr = "C"], suggest #[repr(C)] instead of the current #[repr(C, packed, ...)]. We need to detect specific cases like writing #[repr("packed")], where we should suggest #[repr(packed)], as otherwise provide a list of all the valid reprs.

(Follow up to #61140)
@estebank estebank added C-enhancement Category: An issue proposing an enhancement or a PR with one. A-diagnostics Area: Messages for errors, warnings, and lints P-low Low priority A-suggestion-diagnostics Area: Suggestions generated by the compiler applied by `cargo fix`. labels May 28, 2019
@estebank estebank added the D-papercut Diagnostics: An error or lint that needs small tweaks. label Oct 5, 2019
@PotHix PotHix mentioned this issue Nov 8, 2019
Merged
PotHix added a commit to PotHix/rust that referenced this issue Nov 8, 2019
@PotHix
Suggest #[repr(C)] instead of #[repr(C, packed, ...)]
3fa8692 
The code was previously suggesting `#[repr(C, packed, ...)]` for
incorrect uses of `repr` (e.g. `#[repr = "C"]`). This change suggests
the usage of `#[repr(C)]` instead.

r? @estebank

ref rust-lang#61286
bors added a commit that referenced this issue Nov 19, 2019
@bors
Auto merge of #66206 - PotHix:master, r=estebank
2cad8bb 
Suggest `#[repr(C)]` instead of `#[repr(C, packed, ...)]`

The code was previously suggesting `#[repr(C, packed, ...)]` for incorrect uses of `repr` (e.g. `#[repr = "C"]`). This change suggests the usage of `#[repr(C)]` instead.

r? @estebank

Ref: #61286.
@estebank estebank added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Jan 21, 2020
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A-diagnostics Area: Messages for errors, warnings, and lints A-suggestion-diagnostics Area: Suggestions generated by the compiler applied by `cargo fix`. C-enhancement Category: An issue proposing an enhancement or a PR with one. D-papercut Diagnostics: An error or lint that needs small tweaks. P-low Low priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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