- clarify comment about counterintuitive sorting for Laplace.

[ginac.git] / ginac / add.h

diff --git a/ginac/add.h b/ginac/add.h
index 1e036627c68c8d39bbc37c25e944490c827e7e2c..7400056859347e02a0413cc343ffd82445f4328e 100644 (file)
--- a/ginac/add.h
+++ b/ginac/add.h
@@ -44,7 +44,7 @@ public:
        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;}
@@ -53,6 +53,7 @@ public:
        int ldegree(const ex & s) const;
        ex coeff(const ex & s, int n=1) const;
        ex eval(int level=0) const;
+       ex evalm(void) const;
        ex series(const relational & r, int order, unsigned options = 0) const;
        ex normal(lst &sym_lst, lst &repl_lst, int level=0) const;
        numeric integer_content(void) const;
@@ -77,9 +78,11 @@ protected:
 };
 
 // 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