- prepared for 1.0.13 release

[ginac.git] / ginac / tensor.h

diff --git a/ginac/tensor.h b/ginac/tensor.h
index e30a91a4dcf41ec84070f7ceeb0fca6b5f9fe949..a9cc67ed1f3bd8651e59619f44b4c554b73186b2 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) 1999-2003 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;
 };
 
 
@@ -139,13 +146,6 @@ private:
 
 // utility functions
 
-/** Return the tensor object handled by an ex.  Deprecated: use ex_to<tensor>().
- *  This is unsafe: you need to check the type first. */
-inline const tensor &ex_to_tensor(const ex &e)
-{
-       return static_cast<const tensor &>(*e.bp);
-}
-
 /** Create a delta tensor with specified indices. The indices must be of class
  *  idx or a subclass. The delta tensor is always symmetric and its trace is
  *  the dimension of the index space.
@@ -213,18 +213,6 @@ ex epsilon_tensor(const ex & i1, const ex & i2, const ex & i3);
  *  @return newly constructed epsilon tensor */
 ex lorentz_eps(const ex & i1, const ex & i2, const ex & i3, const ex & i4, bool pos_sig = false);
 
-/** Create an epsilon tensor in a 4-dimensional projection of a D-dimensional
- *  Minkowski space. It vanishes whenever one of the indices is not in the
- *  set {0, 1, 2, 3}.
- *
- *  @param i1 First index
- *  @param i2 Second index
- *  @param i3 Third index
- *  @param i4 Fourth index
- *  @param pos_sig Whether the signature of the metric is positive
- *  @return newly constructed epsilon tensor */
-ex eps0123(const ex & i1, const ex & i2, const ex & i3, const ex & i4, bool pos_sig = false);
-
 } // namespace GiNaC
 
 #endif // ndef __GINAC_TENSOR_H__