*
* Interface to GiNaC's symbolic exponentiation (basis^exponent). */
-#ifndef _POWER_H_
-#define _POWER_H_
+/*
+ * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __GINAC_POWER_H__
+#define __GINAC_POWER_H__
+
+#include "basic.h"
+#include "ex.h"
+
+namespace GiNaC {
-class power;
class numeric;
class add;
* representing exponentiation. */
class power : public basic
{
- friend class mul;
-
+ GINAC_DECLARE_REGISTERED_CLASS(power, basic)
+
+ friend class mul;
+
// member functions
-
- // default constructor, destructor, copy constructor assignment operator and helpers
-public:
- power();
- ~power();
- power(power const & other);
- power const & operator=(power const & other);
-protected:
- void copy(power const & other);
- void destroy(bool call_parent);
-
- // other constructors
+
+ // other ctors
public:
- power(ex const & lh, ex const & rh);
- power(ex const & lh, numeric const & rh);
-
- // functions overriding virtual functions from bases classes
+ power(const ex & lh, const ex & rh);
+ power(const ex & lh, const numeric & rh);
+
+ // functions overriding virtual functions from bases classes
public:
- basic * duplicate() const;
- void printraw(ostream & os) const;
- void printtree(ostream & os, unsigned indent) const;
- void print(ostream & os, unsigned upper_precedence=0) const;
- void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const;
- bool info(unsigned inf) const;
- int nops() const;
- ex & let_op(int const i);
- int degree(symbol const & s) const;
- int ldegree(symbol const & s) const;
- ex coeff(symbol const & s, int const n=1) const;
- ex eval(int level=0) const;
- ex evalf(int level=0) const;
- ex diff(symbol const & s) const;
- ex series(symbol const & s, ex const & point, int order) const;
- ex subs(lst const & ls, lst const & lr) const;
- ex normal(lst &sym_lst, lst &repl_lst, int level=0) const;
- ex simplify_ncmul(exvector const & v) const;
+ void print(const print_context & c, unsigned level = 0) const;
+ unsigned precedence(void) const {return 60;}
+ bool info(unsigned inf) const;
+ unsigned nops() const;
+ ex & let_op(int i);
+ ex map(map_func f) const;
+ int degree(const ex & s) const;
+ int ldegree(const ex & s) const;
+ ex coeff(const ex & s, int n = 1) const;
+ ex eval(int level=0) const;
+ ex evalf(int level=0) const;
+ ex evalm(void) const;
+ ex series(const relational & s, int order, unsigned options = 0) const;
+ ex subs(const lst & ls, const lst & lr, bool no_pattern = false) const;
+ ex normal(lst &sym_lst, lst &repl_lst, int level = 0) const;
+ ex to_rational(lst &repl_lst) const;
+ exvector get_free_indices(void) const;
+ ex simplify_ncmul(const exvector & v) const;
protected:
- int compare_same_type(basic const & other) const;
- unsigned return_type(void) const;
- unsigned return_type_tinfo(void) const;
- ex expand(unsigned options=0) const;
-
- // new virtual functions which can be overridden by derived classes
- // none
-
- // non-virtual functions in this class
+ ex derivative(const symbol & s) const;
+ unsigned return_type(void) const;
+ unsigned return_type_tinfo(void) const;
+ ex expand(unsigned options = 0) const;
+
+ // new virtual functions which can be overridden by derived classes
+ // none
+
+ // non-virtual functions in this class
protected:
- ex expand_add(add const & a, int const n) const;
- ex expand_add_2(add const & a) const;
- ex expand_mul(mul const & m, numeric const & n) const;
- //ex expand_commutative_3(ex const & basis, numeric const & exponent,
- // unsigned options) const;
- // ex expand_noncommutative(ex const & basis, numeric const & exponent, unsigned options) const;
-
+ ex expand_add(const add & a, int n) const;
+ ex expand_add_2(const add & a) const;
+ ex expand_mul(const mul & m, const numeric & n) const;
+ //ex expand_commutative_3(const ex & basis, const numeric & exponent,
+ // unsigned options) const;
+ //ex expand_noncommutative(const ex & basis, const numeric & exponent, unsigned options) const;
+
// member variables
-
+
protected:
- ex basis;
- ex exponent;
- static unsigned precedence;
+ ex basis;
+ ex exponent;
};
-// global constants
-
-extern const power some_power;
-extern type_info const & typeid_power;
-
-#define ex_to_power(X) static_cast<power const &>(*(X).bp)
+// utility functions
+inline const power &ex_to_power(const ex &e)
+{
+ return static_cast<const power &>(*e.bp);
+}
// wrapper functions
*
* @param b the basis expression
* @param e the exponent expression */
-inline ex pow(ex const & b, ex const & e)
-{ return power(b,e); }
+inline ex pow(const ex & b, const ex & e)
+{
+ return power(b, e);
+}
-/** Square root expression. Returns a power-object with exponent 1/2 as a new
- * expression. */
-inline ex sqrt(ex const & a)
-{ return power(a,exHALF()); }
+/** Square root expression. Returns a power-object with exponent 1/2. */
+ex sqrt(const ex & a);
-#endif // ndef _POWER_H_
+} // namespace GiNaC
+#endif // ndef __GINAC_POWER_H__
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