array/sarray: add move assignment operator

array/sarray.hpp

@@ -3,13 +3,15 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  *
- * Copyright 2017 Danny Robson <danny@nerdcruft.net>
+ * Copyright 2017-2019 Danny Robson <danny@nerdcruft.net>
  */
 
 #pragma once
 
 #include "../view.hpp"
 
+#include "../iterator/zip.hpp"
+
 #include <cstdlib>
 #include <stdexcept>
 
@@ -67,6 +69,23 @@ namespace cruft {
             sarray (std::begin (_data), std::end (_data))
         { ; }
 
+
+        //---------------------------------------------------------------------
+        sarray& operator= (sarray &&rhs) noexcept (std::is_nothrow_move_constructible_v<T>)
+        {
+            // Destroy the currently held objects.
+            for (auto &obj: *this)
+                obj.~T ();
+
+            // Move-construct the new objects
+            for (auto [idx, obj]: cruft::iterator::izip (rhs))
+                new (&m_data.objects[idx]) T (std::move (obj));
+            m_size = rhs.m_size;
+
+            return *this;
+        }
+
+
         //---------------------------------------------------------------------
         ~sarray ()
         {