From a102f15e7a98a810df4ff4c6bd479bb21deed9f5 Mon Sep 17 00:00:00 2001
From: Ulrich Dorsch <ulrichdorsch+github@proton.me>
Date: Wed, 3 Dec 2025 20:54:17 +0100
Subject: [PATCH] Fix T.65: retrieve copy_trait tag in code example (#2291)

For the tag dispatch to work it is vital to actually use copy_trait's tag.
---
 CppCoreGuidelines.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index bbe0e68..473b7d9 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -18461,7 +18461,7 @@ This is a simplified version of `std::copy` (ignoring the possibility of non-con
     template<class Iter>
     Out copy(Iter first, Iter last, Iter out)
     {
-        using tag_type = typename copy_trait<std::iter_value_t<Iter>>;
+        using tag_type = typename copy_trait<std::iter_value_t<Iter>>::tag;
         return copy_helper(first, last, out, tag_type{})
     }