[clang] [Clang] add user-level sizeless attribute (PR #71894)

[William Moses via cfe-commits]

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@@ -2400,7 +2402,66 @@ bool Type::isWebAssemblyTableType() const {
   return false;
 }
 
-bool Type::isSizelessType() const { return isSizelessBuiltinType(); }
+bool Type::isSizelessType() const {
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wsmoses wrote:

isIncompleteType has a recursive descent open to suggestions and/or renaming it though.

https://github.com/llvm/llvm-project/pull/71894