add missing include (#1126)

The header file uses `std::declval`, so it needs to `#include <utility>`.
microsoft · Jul 4, 2023 · 167c77d · 167c77d
1 parent 87e2140
commit 167c77d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git 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