From 2e4ed0ff1c6df1a01584af23c7fc765e4356a969 Mon Sep 17 00:00:00 2001
From: Ulrich Dorsch <ulrichdorsch+github@proton.me>
Date: Mon, 6 Oct 2025 08:56:56 +0200
Subject: [PATCH] Fix T.65: retrieve copy_trait tag in code example

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 5ea72070c..ef1930036 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{})
     }