new lint: vec_resize_to_zero #5637
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phansch
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☔ The latest upstream changes (presumably #5651) made this pull request unmergeable. Please resolve the merge conflicts. |
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This looks good btw, just needs to be rebased and have a CI run that doesn't fall over. cc @flip1995 |
flip1995
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May 27, 2020
| if let ExprKind::Lit(Spanned { node: LitKind::Int(0, _), .. }) = args[1].kind; | ||
| if let ExprKind::Lit(Spanned { node: LitKind::Int(..), .. }) = args[2].kind; | ||
| then { | ||
| span_lint(cx, VEC_RESIZE_TO_ZERO, expr.span, "this empties the vector. It could be an argument inversion mistake. If not, call `clear()` instead."); |
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I would suggest to split up the message and suggestion:
Suggested change
| span_lint(cx, VEC_RESIZE_TO_ZERO, expr.span, "this empties the vector. It could be an argument inversion mistake. If not, call `clear()` instead."); | |
| span_lint_and_then( | |
| cx, | |
| VEC_RESIZE_TO_ZERO, | |
| expr.span, | |
| "emptying a vector with `resize`", | |
| |db| { | |
| db.help("the arguments may be inverted..."); | |
| db.span_suggestion( | |
| resize_span, | |
| "...or you can use `clear` to empty the vector", | |
| "clear()", | |
| Applicability::MaybeIncorrect, | |
| ); | |
| }, | |
| ); |
Note, that you also have to get the span of the method call as resize_span for the suggestion to work.
yaahc
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tnielens
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Should this lint move to the |
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I think having this in its own module is fine. The methods module is more about methods (chaining) in general, while this is more about arguments to a specific method. |
flip1995
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@bors r=yaahc,flip1995 |
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📌 Commit 5faab87 has been approved by |
bors
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May 31, 2020
…ip1995 new lint: vec_resize_to_zero implements #5444 changelog: new lint vec_resize_to_zero
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@bors retry (yeeting to rollup) |
bors
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May 2, 2024
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
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implements #5444
changelog: new lint vec_resize_to_zero