* Interface to GiNaC's sums of expressions. */
/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2003 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
GINAC_DECLARE_REGISTERED_CLASS(add, expairseq)
friend class mul;
- friend class ncmul;
friend class power;
// other constructors
add(const epvector & v, const ex & oc);
add(epvector * vp, const ex & oc);
- // 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;
unsigned precedence(void) const {return 40;}
};
// utility functions
-inline const add &ex_to_add(const ex &e)
+
+/** Specialization of is_exactly_a<add>(obj) for add objects. */
+template<> inline bool is_exactly_a<add>(const basic & obj)
{
- return static_cast<const add &>(*e.bp);
+ return obj.tinfo()==TINFO_add;
}
} // namespace GiNaC