Handle rustc_const_stable attribute in library feature collector
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1 changed files with 7 additions and 4 deletions
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@ -29,10 +29,11 @@ impl<'tcx> LibFeatureCollector<'tcx> {
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}
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fn extract(&self, attr: &Attribute) -> Option<(Symbol, Option<Symbol>, Span)> {
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let stab_attrs = [sym::stable, sym::unstable, sym::rustc_const_unstable];
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let stab_attrs =
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[sym::stable, sym::unstable, sym::rustc_const_stable, sym::rustc_const_unstable];
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// Find a stability attribute (i.e., `#[stable (..)]`, `#[unstable (..)]`,
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// `#[rustc_const_unstable (..)]`).
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// Find a stability attribute: one of #[stable(…)], #[unstable(…)],
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// #[rustc_const_stable(…)], or #[rustc_const_unstable(…)].
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if let Some(stab_attr) = stab_attrs.iter().find(|stab_attr| attr.has_name(**stab_attr)) {
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let meta_kind = attr.meta_kind();
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if let Some(MetaItemKind::List(ref metas)) = meta_kind {
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@ -52,7 +53,9 @@ impl<'tcx> LibFeatureCollector<'tcx> {
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// This additional check for stability is to make sure we
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// don't emit additional, irrelevant errors for malformed
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// attributes.
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if *stab_attr != sym::stable || since.is_some() {
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let is_unstable =
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matches!(*stab_attr, sym::unstable | sym::rustc_const_unstable);
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if since.is_some() || is_unstable {
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return Some((feature, since, attr.span));
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}
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}
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