[clang] [clang-tools-extra] [Clang] Add a builtin that deduplicate types into a pack (PR #106730)

[Ilya Biryukov via cfe-commits]

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@@ -1914,7 +1914,8 @@ Decl *TemplateDeclInstantiator::VisitFriendDecl(FriendDecl *D) {
         UnsignedOrNone NumExpansions = std::nullopt;
         if (SemaRef.CheckParameterPacksForExpansion(
                 D->getEllipsisLoc(), D->getSourceRange(), Unexpanded,
-                TemplateArgs, ShouldExpand, RetainExpansion, NumExpansions))
+                TemplateArgs, true, ShouldExpand, RetainExpansion,
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ilya-biryukov wrote:

Done.

https://github.com/llvm/llvm-project/pull/106730