namespace GiNaC {
-/** This class acts as a wildcard for subs(), match() and has(). An integer
- * label is used to identify different wildcards. */
+/** This class acts as a wildcard for subs(), match(), has() and find(). An
+ * integer label is used to identify different wildcards. */
class wildcard : public basic
{
GINAC_DECLARE_REGISTERED_CLASS(wildcard, basic)
/** Construct wildcard with specified label. */
wildcard(unsigned label);
- // 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 calchash(void) const;
bool match(const ex & pattern, lst & repl_lst) const;
+protected:
+ unsigned calchash(void) const;
+
// non-virtual functions in this class
public:
unsigned get_label(void) const {return label;}
};
-// global functions
-inline const wildcard &ex_to_wildcard(const ex &e)
+// utility functions
+
+/** Specialization of is_exactly_a<wildcard>(obj) for wildcard objects. */
+template<> inline bool is_exactly_a<wildcard>(const basic & obj)
{
- return static_cast<const wildcard &>(*e.bp);
+ return obj.tinfo()==TINFO_wildcard;
}
/** Create a wildcard object with the specified label. */