removed a lot of superfluous const_cast<>()s

[ginac.git] / ginac / power.h

diff --git a/ginac/power.h b/ginac/power.h
index 4d93741f0805f1415156f50e43de5f52407b53af..049d55d520c2b56aebdd6dc2425f6e95b9025fae 100644 (file)
--- a/ginac/power.h
+++ b/ginac/power.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's symbolic exponentiation (basis^exponent). */
 
 /*
- *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ *  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
@@ -26,9 +26,7 @@
 #include "basic.h"
 #include "ex.h"
 
-#ifndef NO_NAMESPACE_GINAC
 namespace GiNaC {
-#endif // ndef NO_NAMESPACE_GINAC
 
 class numeric;
 class add;
@@ -38,49 +36,38 @@ class add;
 class power : public basic
 {
        GINAC_DECLARE_REGISTERED_CLASS(power, basic)
-
+       
        friend class mul;
-
+       
 // member functions
-
-       // default constructor, destructor, copy constructor assignment operator and helpers
-public:
-       power();
-       ~power();
-       power(const power & other);
-       const power & operator=(const power & other);
-protected:
-       void copy(const power & other);
-       void destroy(bool call_parent);
-
-       // other constructors
+       
+       // other ctors
 public:
        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 print(std::ostream & os, unsigned upper_precedence = 0) const;
-       void printraw(std::ostream & os) const;
-       void printtree(std::ostream & os, unsigned indent) const;
-       void printcsrc(std::ostream & os, unsigned type, unsigned upper_precedence = 0) 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);
-       int degree(const symbol & s) const;
-       int ldegree(const symbol & s) const;
-       ex coeff(const symbol & s, int n = 1) const;
+       ex map(map_function & 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) 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:
        ex derivative(const symbol & s) const;
-       int compare_same_type(const basic & other) const;
        unsigned return_type(void) const;
        unsigned return_type_tinfo(void) const;
        ex expand(unsigned options = 0) const;
@@ -96,26 +83,29 @@ protected:
        //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;
 };
 
-// global constants
-
-extern const power some_power;
-extern const std::type_info & typeid_power;
-
 // utility functions
+
+/** Return the power object handled by an ex.  Deprecated: use ex_to<power>().
+ *  This is unsafe: you need to check the type first. */
 inline const power &ex_to_power(const ex &e)
 {
        return static_cast<const power &>(*e.bp);
 }
 
+/** Efficient specialization of is_exactly_a<power>(obj) for power objects. */
+template<> inline bool is_exactly_a<power>(const basic & obj)
+{
+       return obj.tinfo()==TINFO_power;
+}
+
 // wrapper functions
 
 /** Symbolic exponentiation.  Returns a power-object as a new expression.
@@ -123,14 +113,13 @@ inline const power &ex_to_power(const ex &e)
  *  @param b the basis expression
  *  @param e the exponent expression */
 inline ex pow(const ex & b, const ex & e)
-{ return power(b,e); }
+{
+       return power(b, e);
+}
 
-/** Square root expression.  Returns a power-object with exponent 1/2 as a new
- *  expression.  */
+/** Square root expression.  Returns a power-object with exponent 1/2. */
 ex sqrt(const ex & a);
 
-#ifndef NO_NAMESPACE_GINAC
 } // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC
 
 #endif // ndef __GINAC_POWER_H__