From 9d7a4839b9c016cf1dc055881fd9cca66bc8500b Mon Sep 17 00:00:00 2001
From: Werner Henze <w.henze@avm.de>
Date: Fri, 16 Feb 2018 23:05:44 +0100
Subject: [PATCH] #621 on MSVC use copy_n with
 stdext::make_checked_array_iterator

---
 include/gsl/gsl_algorithm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/gsl/gsl_algorithm b/include/gsl/gsl_algorithm
index 710792f..2913a81 100644
--- a/include/gsl/gsl_algorithm
+++ b/include/gsl/gsl_algorithm
@@ -25,6 +25,7 @@
 #include <type_traits> // for is_assignable
 
 #ifdef _MSC_VER
+#include <iterator>    // for stdext::make_checked_array_iterator
 #pragma warning(push)
 
 // turn off some warnings that are noisy about our Expects statements
@@ -51,7 +52,11 @@ void copy(span<SrcElementType, SrcExtent> src, span<DestElementType, DestExtent>
                   "Source range is longer than target range");
 
     Expects(dest.size() >= src.size());
+#ifdef _MSC_VER
+    std::copy_n(src.data(), src.size(), stdext::make_checked_array_iterator(dest.data(), dest.size()));
+#else
     std::copy_n(src.data(), src.size(), dest.data());
+#endif
 }
 
 } // namespace gsl