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Add check for doc alias on associated const in trait impls

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This commit is contained in:
Guillaume Gomez 2020-08-24 20:20:03 +02:00
parent 6c44bcc4ff
commit 6e43ff5cea
1 changed files with 11 additions and 1 deletions
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12
compiler/rustc_passes/src/check_attr.rs
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@ -250,13 +250,23 @@ impl CheckAttrVisitor<'tcx> {
None
}
}
Target::AssocConst => {
let parent_hir_id = self.tcx.hir().get_parent_item(hir_id);
let containing_item = self.tcx.hir().expect_item(parent_hir_id);
// We can't link to trait impl's consts.
let err = "associated constant in trait implementation block";
match containing_item.kind {
ItemKind::Impl { of_trait: Some(_), .. } => Some(err),
_ => None,
}
}
_ => None,
} {
self.tcx
.sess
.struct_span_err(
meta.span(),
&format!("`#[doc(alias = \"...\")]` isn't allowed on {}", err,),
&format!("`#[doc(alias = \"...\")]` isn't allowed on {}", err),
)
.emit();
}