[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:

Ok, makes sense.  I am SOMEWHAT remembering that at the time we assumed that >0 meant ==1 at the time, and 'getInnermost' wasn't actually in existence at the time.  So either it was typed confusingly in the 1st place, or things have changed in the meantime.  Either way, probably  bitrot here.

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