[clang] [clang] Revise relnote for int->enum conversion. (PR #145755)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Eli Friedman (efriedma-quic)

<details>
<summary>Changes</summary>

Include more specifics from recent discussion on #<!-- -->143034.

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Full diff: https://github.com/llvm/llvm-project/pull/145755.diff


1 Files Affected:

- (modified) clang/docs/ReleaseNotes.rst (+4-3) 


``````````diff
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index e1fe22393eebb..c81beb62d3f09 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -66,9 +66,10 @@ C++ Specific Potentially Breaking Changes
 - A workaround for libstdc++4.7 has been removed. Note that 4.8.3 remains the oldest
   supported libstdc++ version.
 - Added ``!nonnull/!align`` metadata to load of references for better codegen.
-- Checking for int->enum conversions in constant expressions is more strict;
-  in particular, ``const E x = (E)-1;`` is not treated as a constant if it's
-  out of range. This impacts old versions of Boost.  (#GH143034)
+- Checking for integer to enum conversions in constant expressions is more
+  strict; in particular, ``const E x = (E)-1;`` is not treated as a constant
+  if it's out of range. The Boost numeric_conversion library is impacted by
+  this; it was fixed in Boost 1.81. (#GH143034)
 
 ABI Changes in This Version
 ---------------------------

``````````

</details>


https://github.com/llvm/llvm-project/pull/145755