operator = and copy constructor for ranked_symbol

alib2data/src/common/ranked_symbol.hpp

@@ -35,6 +35,26 @@ public:
 	 */
 	explicit ranked_symbol ( SymbolType symbol, RankType rank );
+	/**
+	 * Default copy constructor
+	 */
+	ranked_symbol ( const ranked_symbol & ) = default;
+
+	/**
+	 * Default move constructor
+	 */
+	ranked_symbol ( ranked_symbol && ) = default;
+
+	/**
+	 * Default copy operator of assignment
+	 */
+	ranked_symbol & operator = ( const ranked_symbol & ) = default;
+
+	/**
+	 * Default move operator of assignment
+	 */
+	ranked_symbol & operator = ( ranked_symbol && ) = default;
+
 	/**
 	 * @return name of the symbol
 	 */