- The default implementations of evalf(), diff(), normal() and expand() use

[ginac.git] / ginac / idx.h

diff --git a/ginac/idx.h b/ginac/idx.h
index 79b9209995db7439f1c0b43db231194338506366..1c7bb9c240346868767dbbaad54b357293664f4b 100644 (file)
--- a/ginac/idx.h
+++ b/ginac/idx.h
@@ -51,9 +51,13 @@ public:
        bool info(unsigned inf) const;
        unsigned nops() const;
        ex & let_op(int i);
+       ex evalf(int level = 0) const;
        bool match(const ex & pattern, lst & repl_lst) const;
        ex subs(const lst & ls, const lst & lr, bool no_pattern = false) const;
 
+protected:
+       ex derivative(const symbol & s) const;
+
        // new virtual functions in this class
 public:
        /** Check whether the index forms a dummy index pair with another index