25 lines
838 B
Rust
25 lines
838 B
Rust
use clippy_utils::diagnostics::span_lint;
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use clippy_utils::is_path_diagnostic_item;
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use clippy_utils::ty::is_uninit_value_valid_for_ty;
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use rustc_hir as hir;
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use rustc_lint::LateContext;
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use rustc_span::sym;
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use super::UNINIT_ASSUMED_INIT;
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/// lint for `MaybeUninit::uninit().assume_init()` (we already have the latter)
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pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) {
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if let hir::ExprKind::Call(callee, args) = recv.kind
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&& args.is_empty()
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&& is_path_diagnostic_item(cx, callee, sym::maybe_uninit_uninit)
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&& !is_uninit_value_valid_for_ty(cx, cx.typeck_results().expr_ty_adjusted(expr))
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{
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span_lint(
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cx,
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UNINIT_ASSUMED_INIT,
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expr.span,
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"this call for this type may be undefined behavior",
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);
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}
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}
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