* Add Pearu's patch canonicalizing class relational, augmented by missing

[ginac.git] / ginac / relational.h

diff --git a/ginac/relational.h b/ginac/relational.h
index c3b223b5eb0f494f722ffc25f20a10ce72de5431..8f2263e64b4e220e34bf906b59306ce5a2165502 100644 (file)
--- a/ginac/relational.h
+++ b/ginac/relational.h
@@ -49,7 +49,7 @@ public:
 public:
        relational(const ex & lhs, const ex & rhs, operators oper=equal);
        
-       // 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 20;}
@@ -57,12 +57,14 @@ public:
        unsigned nops() const;
        ex & let_op(int i);
        ex eval(int level=0) const;
-       ex evalf(int level=0) const;
-       ex normal(lst &sym_lst, lst &repl_lst, int level=0) const;
        ex simplify_ncmul(const exvector & v) const;
+
 protected:
+       bool match_same_type(const basic & other) const;
        unsigned return_type(void) const;
        unsigned return_type_tinfo(void) const;
+       bool is_equal_same_type(const basic & other) const;
+       unsigned calchash(void) const;
 
        // new virtual functions which can be overridden by derived classes
 public:
@@ -82,9 +84,11 @@ protected:
 };
 
 // utility functions
-inline const relational &ex_to_relational(const ex &e)
+
+/** Specialization of is_exactly_a<relational>(obj) for relational objects. */
+template<> inline bool is_exactly_a<relational>(const basic & obj)
 {
-       return static_cast<const relational &>(*e.bp);
+       return obj.tinfo()==TINFO_relational;
 }
 
 } // namespace GiNaC