[libcxx-commits] [libcxx] [libc++][test] `__cpp_lib_within_lifetime` -> `__cpp_lib_is_within_lifetime` (PR #91896)

[Mark de Wever via libcxx-commits]

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@@ -767,6 +767,14 @@ def add_version_header(tc):
             "values": {"c++17": 201603},
             "headers": ["type_traits"],
         },
+        {
+            "name": "__cpp_lib_is_within_lifetime",
+            "values": {
+                "c++26": 202306  # P2641R4 Checking if a union alternative is active
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mordante wrote:

Please update the comment why this name is correct and a link to the SHA1 in the draft repository.
This to avoid the person implementing the paper to undo this fix.

https://github.com/llvm/llvm-project/pull/91896