[clang] [Clang] Add [[clang::diagnose_specializations]] (PR #101469)

[Aaron Ballman via cfe-commits]

================
@@ -0,0 +1,48 @@
+// RUN: %clang_cc1 %s -verify
+
+#if !__has_cpp_attribute(clang::diagnose_specializations)
+#  error
+#endif
+
+struct [[clang::diagnose_specializations]] S {}; // expected-warning {{'diagnose_specializations' attribute only applies to class templates}}
----------------
AaronBallman wrote:

doesn't it also apply to variable templates?

https://github.com/llvm/llvm-project/pull/101469