* Interface to GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2002 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
constant(const std::string & initname, evalffunctype efun = 0, const std::string & texname = std::string());
constant(const std::string & initname, const numeric & initnumber, const std::string & texname = std::string());
- // functions overriding virtual functions from bases classes
+ // functions overriding virtual functions from base classes
public:
void print(const print_context & c, unsigned level = 0) const;
- int degree(const ex & s) const;
- int ldegree(const ex & s) const;
- ex coeff(const ex & s, int n = 1) const;
ex evalf(int level = 0) const;
protected:
ex derivative(const symbol & s) const;
extern const constant Euler;
// utility functions
-inline const constant &ex_to_constant(const ex &e)
+
+/** Specialization of is_exactly_a<constant>(obj) for constant objects. */
+template<> inline bool is_exactly_a<constant>(const basic & obj)
{
- return static_cast<const constant &>(*e.bp);
+ return obj.tinfo()==TINFO_constant;
}
} // namespace GiNaC