[clang] [clang] Allow attributes on first constructor argument in pre-C++11 (PR #157300)

[Yanzuo Liu via cfe-commits]

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@@ -324,6 +324,8 @@ Bug Fixes to Attribute Support
   is skipped, such as error recovery and code completion. (#GH153551)
 - Using ``[[gnu::cleanup(some_func)]]`` where some_func is annotated with
   ``[[gnu::error("some error")]]`` now correctly triggers an error. (#GH146520)
+- Stop rejecting C++11-style attributes on the first argument of constructors in older
+  standards. (#GH156809).
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zwuis wrote:

This can be moved to "Bug Fixes to C++ Support" subsection.

https://github.com/llvm/llvm-project/pull/157300