[clang] [Clang][Sema] Refactor collection of multi-level template argument lists (PR #106585)

[Erich Keane via cfe-commits]

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@@ -585,8 +585,8 @@ static bool CheckConstraintSatisfaction(
 
   ArrayRef<TemplateArgument> TemplateArgs =
       TemplateArgsLists.getNumSubstitutedLevels() > 0
-          ? TemplateArgsLists.getOutermost()
-          : ArrayRef<TemplateArgument> {};
+          ? TemplateArgsLists.getInnermost()
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erichkeane wrote:

This looks strange, can you explain what is going on here?

https://github.com/llvm/llvm-project/pull/106585