- virtual basic * duplicate() const;
- virtual void print(ostream & os,unsigned upper_precedence=0) const;
- virtual void printraw(ostream & os) const;
- virtual void printtree(ostream & os, unsigned indent) const;
- virtual void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
- virtual void dbgprint(void) const;
- virtual void dbgprinttree(void) const;
- virtual bool info(unsigned inf) const;
- virtual unsigned nops() const;
- virtual ex op(int i) const;
- virtual ex & let_op(int i);
- virtual ex operator[](const ex & index) const;
- virtual ex operator[](int i) const;
- virtual bool has(const ex & other) const;
- virtual int degree(const symbol & s) const;
- virtual int ldegree(const symbol & s) const;
- virtual ex coeff(const symbol & s, int n=1) const;
- virtual ex collect(const symbol & s) const;
- virtual ex eval(int level=0) const;
- virtual ex evalf(int level=0) const;
- virtual ex diff(const symbol & s) const;
- virtual ex series(const symbol & s, const ex & point, int order) const;
- virtual ex subs(const lst & ls, const lst & lr) const;
- virtual ex normal(lst &sym_lst, lst &repl_lst, int level=0) const;
- virtual numeric integer_content(void) const;
- virtual ex smod(const numeric &xi) const;
- virtual numeric max_coefficient(void) const;
- virtual exvector get_indices(void) const;
- virtual ex simplify_ncmul(const exvector & v) const;
-protected: // non-const functions should be called from class ex only
- virtual int compare_same_type(const basic & other) const;
- virtual bool is_equal_same_type(const basic & other) const;
- virtual unsigned return_type(void) const;
- virtual unsigned return_type_tinfo(void) const;
- virtual unsigned calchash(void) const;
- virtual ex expand(unsigned options=0) const;
-
- // non-virtual functions in this class
+
+ /** Create a clone of this object on the heap. One can think of this as
+ * simulating a virtual copy constructor which is needed for instance by
+ * the refcounted construction of an ex from a basic. */
+ virtual basic * duplicate() const { return new basic(*this); }
+
+ // evaluation
+ virtual ex eval(int level = 0) const;
+ virtual ex evalf(int level = 0) const;
+ virtual ex evalm() const;
+protected:
+ virtual ex eval_ncmul(const exvector & v) const;