From 167c77d28ed813b41d7e8936cbe47cc90f9f11ba Mon Sep 17 00:00:00 2001
From: Werner Henze <34543625+beinhaerter@users.noreply.github.com>
Date: Tue, 4 Jul 2023 02:20:50 +0200
Subject: [PATCH] add missing include (#1126)

The header file uses `std::declval`, so it needs to `#include <utility>`.
---
 include/gsl/pointers | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/gsl/pointers b/include/gsl/pointers
index 6f9a193..9f419e0 100644
--- a/include/gsl/pointers
+++ b/include/gsl/pointers
@@ -24,6 +24,7 @@
 #include <memory>       // for shared_ptr, unique_ptr
 #include <system_error> // for hash
 #include <type_traits>  // for enable_if_t, is_convertible, is_assignable
+#include <utility>      // for declval
 
 #if !defined(GSL_NO_IOSTREAMS)
 #include <iosfwd> // for ostream