diff options
| -rw-r--r-- | compiler/rustc_passes/src/stability.rs | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/compiler/rustc_passes/src/stability.rs b/compiler/rustc_passes/src/stability.rs index 4ca52f405fb..24972b5cc6a 100644 --- a/compiler/rustc_passes/src/stability.rs +++ b/compiler/rustc_passes/src/stability.rs @@ -368,6 +368,21 @@ impl<'tcx> MissingStabilityAnnotations<'tcx> { self.tcx.sess.span_err(span, &format!("{} has missing stability attribute", descr)); } } + + fn check_missing_const_stability(&self, hir_id: HirId, span: Span) { + let stab_map = self.tcx.stability(); + let stab = stab_map.local_stability(hir_id); + if stab.map_or(false, |stab| stab.level.is_stable()) { + let const_stab = stab_map.local_const_stability(hir_id); + if const_stab.is_none() { + self.tcx.sess.span_err( + span, + "`#[stable]` const functions must also be either \ + `#[rustc_const_stable]` or `#[rustc_const_unstable]`", + ); + } + } + } } impl<'tcx> Visitor<'tcx> for MissingStabilityAnnotations<'tcx> { @@ -378,14 +393,23 @@ impl<'tcx> Visitor<'tcx> for MissingStabilityAnnotations<'tcx> { } fn visit_item(&mut self, i: &'tcx Item<'tcx>) { - match i.kind { - // Inherent impls and foreign modules serve only as containers for other items, - // they don't have their own stability. They still can be annotated as unstable - // and propagate this unstability to children, but this annotation is completely - // optional. They inherit stability from their parents when unannotated. - hir::ItemKind::Impl { of_trait: None, .. } | hir::ItemKind::ForeignMod(..) => {} + // Inherent impls and foreign modules serve only as containers for other items, + // they don't have their own stability. They still can be annotated as unstable + // and propagate this unstability to children, but this annotation is completely + // optional. They inherit stability from their parents when unannotated. + if !matches!( + i.kind, + hir::ItemKind::Impl { of_trait: None, .. } | hir::ItemKind::ForeignMod(..) + ) { + self.check_missing_stability(i.hir_id, i.span); + } - _ => self.check_missing_stability(i.hir_id, i.span), + // Ensure `const fn` that are `stable` have one of `rustc_const_unstable` or + // `rustc_const_stable`. + if self.tcx.features().staged_api + && matches!(&i.kind, hir::ItemKind::Fn(sig, ..) if sig.header.is_const()) + { + self.check_missing_const_stability(i.hir_id, i.span); } intravisit::walk_item(self, i) |