[clang] [llvm] [Clang] restrict use of attribute names reserved by the C++ standard (PR #106036)

[Oleksandr T. via llvm-commits]

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+// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -fsyntax-only -verify -pedantic %s -DTEST1
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -fsyntax-only -verify -pedantic %s -DTEST2
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -fsyntax-only -verify -pedantic %s -DTEST3
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -fsyntax-only -verify -pedantic %s -DTEST4
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a-tarasyuk wrote:

I've added `DefaultIgnore` for this diagnostic, to follow the behavior like `macro name is a reserved identifier` does. Is it ok?

https://github.com/llvm/llvm-project/pull/106036