Adds copy and assignment operators for Dictionary

src/Collections/Dictionary.hpp

@@ -26,6 +26,16 @@ namespace ArbUt {
         /// @brief Initialises a dictionary from an initializer_list.
         Dictionary(const std::initializer_list<std::pair<const KeyT, ValueT>>& l)
             : _map(new std::unordered_map<KeyT, ValueT>(l)) {}
+        /// @brief Copy operator
+        Dictionary(const Dictionary& other) noexcept : _map(other._map) {}
+        /// @brief Assignment operator
+        Dictionary& operator=(const Dictionary& other) noexcept {
+            if (this == &other || _map == other._map) {
+                return *this;
+            }
+            _map = other._map;
+            return *this;
+        }
 
         /// @brief Removes all items from the dictionary.
         inline void Clear() noexcept { _map->clear(); }