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legacy_numeric_constants: Check HIR tree first.

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This commit is contained in:
Jason Newcomb 2024-06-12 22:50:13 -04:00
parent 03036c11b3
commit 5ae33c7699
1 changed files with 19 additions and 27 deletions
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46
clippy_lints/src/legacy_numeric_constants.rs
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@ -48,15 +48,11 @@ pub fn new(msrv: Msrv) -> Self {
impl<'tcx> LateLintPass<'tcx> for LegacyNumericConstants {
fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) {
let Self { msrv } = self;
if !msrv.meets(NUMERIC_ASSOCIATED_CONSTANTS) || in_external_macro(cx.sess(), item.span) {
return;
}
// Integer modules are "TBD" deprecated, and the contents are too,
// so lint on the `use` statement directly.
if let ItemKind::Use(path, kind @ (UseKind::Single | UseKind::Glob)) = item.kind
&& self.msrv.meets(NUMERIC_ASSOCIATED_CONSTANTS)
&& !in_external_macro(cx.sess(), item.span)
&& let Some(def_id) = path.res[0].opt_def_id()
{
let module = if is_integer_module(cx, def_id) {
@ -103,12 +99,7 @@ fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'tcx>) {
}
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx rustc_hir::Expr<'tcx>) {
let Self { msrv } = self;
if !msrv.meets(NUMERIC_ASSOCIATED_CONSTANTS) || in_external_macro(cx.sess(), expr.span) {
return;
}
let ExprKind::Path(qpath) = expr.kind else {
let ExprKind::Path(qpath) = &expr.kind else {
return;
};
@ -129,10 +120,10 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx rustc_hir::Expr<'tc
)
// `<integer>::xxx_value` check
} else if let QPath::TypeRelative(_, last_segment) = qpath
&& let Some(def_id) = cx.qpath_res(&qpath, expr.hir_id).opt_def_id()
&& is_integer_method(cx, def_id)
&& let Some(def_id) = cx.qpath_res(qpath, expr.hir_id).opt_def_id()
&& let Some(par_expr) = get_parent_expr(cx, expr)
&& let ExprKind::Call(_, _) = par_expr.kind
&& let ExprKind::Call(_, []) = par_expr.kind
&& is_integer_method(cx, def_id)
{
let name = last_segment.ident.name.as_str();
@ -145,19 +136,20 @@ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx rustc_hir::Expr<'tc
return;
};
if is_from_proc_macro(cx, expr) {
return;
if self.msrv.meets(NUMERIC_ASSOCIATED_CONSTANTS)
&& !in_external_macro(cx.sess(), expr.span)
&& !is_from_proc_macro(cx, expr)
{
span_lint_hir_and_then(cx, LEGACY_NUMERIC_CONSTANTS, expr.hir_id, span, msg, |diag| {
diag.span_suggestion_with_style(
span,
"use the associated constant instead",
sugg,
Applicability::MaybeIncorrect,
SuggestionStyle::ShowAlways,
);
});
}
span_lint_hir_and_then(cx, LEGACY_NUMERIC_CONSTANTS, expr.hir_id, span, msg, |diag| {
diag.span_suggestion_with_style(
span,
"use the associated constant instead",
sugg,
Applicability::MaybeIncorrect,
SuggestionStyle::ShowAlways,
);
});
}
extract_msrv_attr!(LateContext);