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https://github.com/rust-lang/rust-clippy
synced 2024-11-23 05:03:21 +00:00
Fix box_default
behaviour with empty vec![]
coming from macro arg
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parent
7af811b6c4
commit
23d533264f
3 changed files with 33 additions and 5 deletions
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@ -45,7 +45,7 @@ impl LateLintPass<'_> for BoxDefault {
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&& let ExprKind::Path(QPath::TypeRelative(ty, seg)) = box_new.kind
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&& let ExprKind::Call(arg_path, ..) = arg.kind
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&& !in_external_macro(cx.sess(), expr.span)
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&& (expr.span.eq_ctxt(arg.span) || is_vec_expn(cx, arg))
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&& (expr.span.eq_ctxt(arg.span) || is_local_vec_expn(cx, arg, expr))
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&& seg.ident.name == sym::new
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&& path_def_id(cx, ty).map_or(false, |id| Some(id) == cx.tcx.lang_items().owned_box())
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&& is_default_equivalent(cx, arg)
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@ -81,10 +81,10 @@ fn is_plain_default(cx: &LateContext<'_>, arg_path: &Expr<'_>) -> bool {
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}
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}
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fn is_vec_expn(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
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macro_backtrace(expr.span)
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.next()
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.map_or(false, |call| cx.tcx.is_diagnostic_item(sym::vec_macro, call.def_id))
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fn is_local_vec_expn(cx: &LateContext<'_>, expr: &Expr<'_>, ref_expr: &Expr<'_>) -> bool {
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macro_backtrace(expr.span).next().map_or(false, |call| {
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cx.tcx.is_diagnostic_item(sym::vec_macro, call.def_id) && call.span.eq_ctxt(ref_expr.span)
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})
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}
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#[derive(Default)]
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@ -90,3 +90,17 @@ fn issue_10381() {
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assert!(maybe_get_bar(2).is_some());
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}
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#[allow(unused)]
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fn issue_11868() {
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fn foo(_: &mut Vec<usize>) {}
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macro_rules! bar {
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($baz:expr) => {
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Box::leak(Box::new($baz))
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};
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}
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foo(bar!(vec![]));
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foo(bar!(vec![1]));
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}
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@ -90,3 +90,17 @@ fn issue_10381() {
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assert!(maybe_get_bar(2).is_some());
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}
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#[allow(unused)]
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fn issue_11868() {
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fn foo(_: &mut Vec<usize>) {}
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macro_rules! bar {
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($baz:expr) => {
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Box::leak(Box::new($baz))
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};
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}
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foo(bar!(vec![]));
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foo(bar!(vec![1]));
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}
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