- carried on with felonious plot about making ex::bp private.

[ginac.git] / ginac / mul.h

diff --git a/ginac/mul.h b/ginac/mul.h
index 2808db99addaf9312ad29a9a6d5b06ce9f484193..23e0e1f3e60845d914631ec9be0d53a4ae72e82b 100644 (file)
--- a/ginac/mul.h
+++ b/ginac/mul.h
@@ -45,7 +45,7 @@ public:
        mul(epvector * vp, const ex & oc);
        mul(const ex & lh, const ex & mh, const ex & rh);
        
-       // 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 50;}
@@ -90,11 +90,20 @@ protected:
 };
 
 // utility functions
+
+/** Return the mul object handled by an ex.  Deprecated: use ex_to<mul>().
+ *  This is unsafe: you need to check the type first. */
 inline const mul &ex_to_mul(const ex &e)
 {
        return static_cast<const mul &>(*e.bp);
 }
 
+/** Specialization of is_exactly_a<mul>(obj) for mul objects. */
+template<> inline bool is_exactly_a<mul>(const basic & obj)
+{
+       return obj.tinfo()==TINFO_mul;
+}
+
 } // namespace GiNaC
 
 #endif // ndef __GINAC_MUL_H__