moved some common code to the 'tensor' class

[ginac.git] / ginac / tensor.h

diff --git a/ginac/tensor.h b/ginac/tensor.h
index d3b27b6074c665fa4d4b82d1d59b7bacbc4fb2f8..9b19dc187587e99f7cd2787018df64277a215d20 100644 (file)
--- a/ginac/tensor.h
+++ b/ginac/tensor.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's special tensors. */
 
 /*
- *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -37,11 +37,18 @@ class tensor : public basic
 
        // other constructors
 protected:
-       tensor(unsigned ti);
+       tensor(unsigned ti) : inherited(ti) {}
 
        // functions overriding virtual functions from base classes
 protected:
        unsigned return_type(void) const { return return_types::noncommutative_composite; }
+
+       // non-virtual functions in this class
+public:
+       /** Replace dummy index in contracted-with object by the contracting
+        *  object's second index (used internally for delta and metric tensor
+        *  contractions. */
+       bool replace_contr_index(exvector::iterator self, exvector::iterator other) const;
 };