[clang] [clang] Warn [[clang::lifetimebound]] misusages on types (PR #118281)

[Maksim Ivanov via cfe-commits]

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@@ -8612,7 +8612,11 @@ static void HandleLifetimeBoundAttr(TypeProcessingState &State,
     CurType = State.getAttributedType(
         createSimpleAttr<LifetimeBoundAttr>(State.getSema().Context, Attr),
         CurType, CurType);
+    return;
   }
+  State.getSema().Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type_str)
+      << Attr << Attr.isRegularKeywordAttribute()
+      << "parameters and implicit object parameters";
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emaxx-google wrote:

Sure! Let me create a follow-up PR, since that'll be a work for a different (although very similar) attribute.

https://github.com/llvm/llvm-project/pull/118281