From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Kasting <pkasting@chromium.org>
Date: Wed, 23 Oct 2024 09:38:17 -0700
Subject: Fix compiler failure on older Clang.

On crrev.com/c/5774729 someone reported that omitting `typename` in a
few places caused an error for them. This should be allowed in C++20,
but apparently was not accepted by (what the author believes is)
Clang 15. I don't know whether V8 officially supports this version.

Since it's harmless to explicitly add the `typename` here, go ahead and
do so to make life less painful.

Bug: none
Change-Id: I97a125a6ac9fa21fa15723888ca00790cc4fb4ee
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5957255
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/main@{#96791}

diff --git a/include/v8-internal.h b/include/v8-internal.h
index a13db2bd74ad4b412cf8bd067c7b25c2acb1bcb8..99099fb1bb617014365b1ba3eaf4bd99d6eb6d4b 100644
--- a/include/v8-internal.h
+++ b/include/v8-internal.h
@@ -1430,7 +1430,7 @@ struct MaybeDefineIteratorConcept {};
 template <typename Iterator>
 struct MaybeDefineIteratorConcept<
     Iterator, std::enable_if_t<kHaveIteratorConcept<Iterator>>> {
-  using iterator_concept = Iterator::iterator_concept;
+  using iterator_concept = typename Iterator::iterator_concept;
 };
 // Otherwise fall back to `std::iterator_traits<Iterator>` if possible.
 template <typename Iterator>
@@ -1443,7 +1443,8 @@ struct MaybeDefineIteratorConcept<
   // TODO(pkasting): Add this unconditionally after dropping support for old
   // libstdc++ versions.
 #if __has_include(<ranges>)
-  using iterator_concept = std::iterator_traits<Iterator>::iterator_concept;
+  using iterator_concept =
+      typename std::iterator_traits<Iterator>::iterator_concept;
 #endif
 };