- replaced the Derivative() function by a more resonable fderivative class;

[ginac.git] / ginac / symbol.cpp

diff --git a/ginac/symbol.cpp b/ginac/symbol.cpp
index ba0cccd1004b20754a2def09bfa47bd3904ded44..f5fd4a090b0df1f1ab66440b730d31b520104ada 100644 (file)
--- a/ginac/symbol.cpp
+++ b/ginac/symbol.cpp
@@ -28,6 +28,7 @@
 #include "print.h"
 #include "archive.h"
 #include "debugmsg.h"
+#include "tostring.h"
 #include "utils.h"
 
 namespace GiNaC {
@@ -137,7 +138,7 @@ void symbol::archive(archive_node &n) const
 }
 
 //////////
-// functions overriding virtual functions from bases classes
+// functions overriding virtual functions from base classes
 //////////
 
 // public
@@ -242,16 +243,6 @@ bool symbol::is_equal_same_type(const basic & other) const
        return serial==o->serial;
 }
 
-unsigned symbol::return_type(void) const
-{
-       return return_types::commutative;
-}
-   
-unsigned symbol::return_type_tinfo(void) const
-{
-       return tinfo_key;
-}
-
 unsigned symbol::calchash(void) const
 {
        // this is where the schoolbook method