================
@@ -858,6 +859,27 @@ class PackDeductionScope {
Info.PendingDeducedPacks[Pack.Index] = Pack.Outer;
}
+ // Return the size of the saved packs if all of them has the same size.
+ std::optional<unsigned> getSavedPackSizeIfAllEqual() const {
+ if (Packs.size() == 0 ||
+ Packs[0].Saved.getKind() != clang::TemplateArgument::Pack)
+ return {};
+ unsigned PackSize = Packs[0].Saved.pack_size();
+
+ if (std::all_of(Packs.begin() + 1, Packs.end(), [&PackSize](auto P) {
----------------
erichkeane wrote:
```suggestion
if (std::all_of(Packs.begin() + 1, Packs.end(), [&PackSize](const auto &P) {
```
https://github.com/llvm/llvm-project/pull/79371
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