[PATCH] D106030: [Clang] add support for error+warning fn attrs

[Nick Desaulniers via Phabricator via cfe-commits]

nickdesaulniers added inline comments.


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Comment at: clang/lib/Sema/SemaDecl.cpp:3368
+      Diag(Old->getLocation(), diag::note_previous_declaration);
+      New->dropAttr<InternalLinkageAttr>();
+    }
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Should be dropping `ErrorAttr`.


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Comment at: clang/test/Sema/attr-error.c:26
+
+__attribute__((error("foo"), warning("foo"))) // expected-error {{'warning' and 'error' attributes are not compatible}}
+int
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aaron.ballman wrote:
> Can you also add a test for:
> ```
> __attribute__((error("foo"))) int bad5(void); // expected-note {{conflicting attribute is here}}
> __attribute__((warning("foo"))) int bad5(void); // expected-error {{'warning' and 'error' attributes are not compatible}}
> ```
Ah, that exposes the case you discussed above:
> I think you need to follow the attribute merge pattern used in SemaDecl.cpp.

So I did a relatively larger refactor to support that. Doing so required me to make this an InheritableAttr. PTAL


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  https://reviews.llvm.org/D106030/new/

https://reviews.llvm.org/D106030