+ // other constructors
+public:
+ /** Construct index with given value, dimension, variance and dot.
+ *
+ * @param v Value of index (numeric or symbolic)
+ * @param dim Dimension of index space (numeric or symbolic)
+ * @param covariant Make covariant index (default is contravariant)
+ * @param dotted Make covariant dotted (default is undotted)
+ * @return newly constructed index */
+ spinidx(const ex & v, const ex & dim = 2, bool covariant = false, bool dotted = false);
+
+ // functions overriding virtual functions from base classes
+public:
+ bool is_dummy_pair_same_type(const basic & other) const;
+ // complex conjugation
+ ex conjugate() const { return toggle_dot(); }
+ void archive(archive_node& n) const;
+ void read_archive(const archive_node& n, lst& syms);
+protected:
+ bool match_same_type(const basic & other) const;
+
+ // non-virtual functions in this class
+public:
+ /** Check whether the index is dotted. */
+ bool is_dotted() const {return dotted;}
+
+ /** Check whether the index is not dotted. */
+ bool is_undotted() const {return !dotted;}
+
+ /** Make a new index with the same value and variance but the opposite
+ * dottedness. */
+ ex toggle_dot() const;
+
+ /** Make a new index with the same value but opposite variance and
+ * dottedness. */
+ ex toggle_variance_dot() const;
+
+protected:
+ void do_print(const print_context & c, unsigned level) const;
+ void do_print_latex(const print_latex & c, unsigned level) const;
+ void do_print_tree(const print_tree & c, unsigned level) const;
+
+ // member variables
+protected:
+ bool dotted;
+};
+GINAC_DECLARE_UNARCHIVER(spinidx);
+
+
+// utility functions