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use let chains in hir, lint, mir

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This commit is contained in:
Kivooeo
2025-07-26 06:21:54 +05:00
parent 43725ed819
commit bae38bad78
24 changed files with 278 additions and 307 deletions
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48
compiler/rustc_lint/src/builtin.rs
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@@ -2446,16 +2446,16 @@ impl<'tcx> LateLintPass<'tcx> for InvalidValue {
/// Determine if this expression is a "dangerous initialization".
fn is_dangerous_init(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> Option<InitKind> {
if let hir::ExprKind::Call(path_expr, args) = expr.kind {
if let hir::ExprKind::Call(path_expr, args) = expr.kind
// Find calls to `mem::{uninitialized,zeroed}` methods.
if let hir::ExprKind::Path(ref qpath) = path_expr.kind {
let def_id = cx.qpath_res(qpath, path_expr.hir_id).opt_def_id()?;
match cx.tcx.get_diagnostic_name(def_id) {
Some(sym::mem_zeroed) => return Some(InitKind::Zeroed),
Some(sym::mem_uninitialized) => return Some(InitKind::Uninit),
Some(sym::transmute) if is_zero(&args[0]) => return Some(InitKind::Zeroed),
_ => {}
}
&& let hir::ExprKind::Path(ref qpath) = path_expr.kind
{
let def_id = cx.qpath_res(qpath, path_expr.hir_id).opt_def_id()?;
match cx.tcx.get_diagnostic_name(def_id) {
Some(sym::mem_zeroed) => return Some(InitKind::Zeroed),
Some(sym::mem_uninitialized) => return Some(InitKind::Uninit),
Some(sym::transmute) if is_zero(&args[0]) => return Some(InitKind::Zeroed),
_ => {}
}
} else if let hir::ExprKind::MethodCall(_, receiver, ..) = expr.kind {
// Find problematic calls to `MaybeUninit::assume_init`.
@@ -2463,14 +2463,14 @@ impl<'tcx> LateLintPass<'tcx> for InvalidValue {
if cx.tcx.is_diagnostic_item(sym::assume_init, def_id) {
// This is a call to *some* method named `assume_init`.
// See if the `self` parameter is one of the dangerous constructors.
if let hir::ExprKind::Call(path_expr, _) = receiver.kind {
if let hir::ExprKind::Path(ref qpath) = path_expr.kind {
let def_id = cx.qpath_res(qpath, path_expr.hir_id).opt_def_id()?;
match cx.tcx.get_diagnostic_name(def_id) {
Some(sym::maybe_uninit_zeroed) => return Some(InitKind::Zeroed),
Some(sym::maybe_uninit_uninit) => return Some(InitKind::Uninit),
_ => {}
}
if let hir::ExprKind::Call(path_expr, _) = receiver.kind
&& let hir::ExprKind::Path(ref qpath) = path_expr.kind
{
let def_id = cx.qpath_res(qpath, path_expr.hir_id).opt_def_id()?;
match cx.tcx.get_diagnostic_name(def_id) {
Some(sym::maybe_uninit_zeroed) => return Some(InitKind::Zeroed),
Some(sym::maybe_uninit_uninit) => return Some(InitKind::Uninit),
_ => {}
}
}
}
@@ -2724,13 +2724,13 @@ impl<'tcx> LateLintPass<'tcx> for DerefNullPtr {
}
// check for call to `core::ptr::null` or `core::ptr::null_mut`
hir::ExprKind::Call(path, _) => {
if let hir::ExprKind::Path(ref qpath) = path.kind {
if let Some(def_id) = cx.qpath_res(qpath, path.hir_id).opt_def_id() {
return matches!(
cx.tcx.get_diagnostic_name(def_id),
Some(sym::ptr_null | sym::ptr_null_mut)
);
}
if let hir::ExprKind::Path(ref qpath) = path.kind
&& let Some(def_id) = cx.qpath_res(qpath, path.hir_id).opt_def_id()
{
return matches!(
cx.tcx.get_diagnostic_name(def_id),
Some(sym::ptr_null | sym::ptr_null_mut)
);
}
}
_ => {}