[clang] [Clang][C++23] Implement P1774R8: Portable assumptions (PR #81014)

[Erich Keane via cfe-commits]

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@@ -4528,6 +4528,54 @@ static bool IsBuiltInOrStandardCXX11Attribute(IdentifierInfo *AttrName,
   }
 }
 
+/// Parse the argument to C++23's [[assume()]] attribute.
+bool Parser::ParseAssumeAttributeArg(ParsedAttributes &Attrs,
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erichkeane wrote:

Hopefully someone more familiar with the parsing will come by, my familiarity here is limited.

https://github.com/llvm/llvm-project/pull/81014