Add lint transmute_undefined_repr
#8398
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r? @llogiq (rust-highfive has picked a reviewer for you, use r? to override) |
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Feb 6, 2022
| fn check_expr(&mut self, cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) { | ||
| if_chain! { | ||
| if let ExprKind::Call(path_expr, args) = e.kind; | ||
| if let ExprKind::Call(path_expr, [arg]) = e.kind; |
| &format!("transmute from a `{}` to a `{}`", from_ty, to_ty), | ||
| |diag| { | ||
| let mut expr = &args[0]; | ||
| let mut expr = arg; |
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You could take mut arg and inline this.
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Just one very small nit, otherwise this looks fine. Great work, as always. |
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Thank you! @bors r+ |
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📌 Commit 68993b1 has been approved by |
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☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test |
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Partially implements #3999 and #546
This doesn't consider
enums at all right now as those are going to be a pain to deal with. This also allows#[repr(Rust)]structs with only one non-zero sized fields. I think those are technically undefined when transmuted.changelog: Add lint
transmute_undefined_repr