Additional transformations for mul and power [Sheplyakov].

[ginac.git] / ginac / tensor.cpp

diff --git a/ginac/tensor.cpp b/ginac/tensor.cpp
index 5b43e65a350de329daaaafcb2f33ee822bbc48cd..3de3a959043b22d3ac35897f904624462c98d7cd 100644 (file)
--- a/ginac/tensor.cpp
+++ b/ginac/tensor.cpp
@@ -3,7 +3,7 @@
  *  Implementation of GiNaC's special tensors. */
 
 /*
- *  GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2007 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
@@ -141,6 +141,22 @@ DEFAULT_COMPARE(tensdelta)
 DEFAULT_COMPARE(tensmetric)
 DEFAULT_COMPARE(spinmetric)
 
+bool tensdelta::info(unsigned inf) const
+{
+       if(inf == info_flags::real)
+               return true;
+
+       return false;
+}
+
+bool tensmetric::info(unsigned inf) const
+{
+       if(inf == info_flags::real)
+               return true;
+
+       return false;
+}
+
 int minkmetric::compare_same_type(const basic & other) const
 {
        GINAC_ASSERT(is_a<minkmetric>(other));
@@ -152,6 +168,14 @@ int minkmetric::compare_same_type(const basic & other) const
                return inherited::compare_same_type(other);
 }
 
+bool minkmetric::info(unsigned inf) const
+{
+       if(inf == info_flags::real)
+               return true;
+
+       return false;
+}
+
 int tensepsilon::compare_same_type(const basic & other) const
 {
        GINAC_ASSERT(is_a<tensepsilon>(other));
@@ -165,6 +189,22 @@ int tensepsilon::compare_same_type(const basic & other) const
                return inherited::compare_same_type(other);
 }
 
+bool tensepsilon::info(unsigned inf) const
+{
+       if(inf == info_flags::real)
+               return true;
+
+       return false;
+}
+
+bool spinmetric::info(unsigned inf) const
+{
+       if(inf == info_flags::real)
+               return true;
+
+       return false;
+}
+
 DEFAULT_PRINT_LATEX(tensdelta, "delta", "\\delta")
 DEFAULT_PRINT(tensmetric, "g")
 DEFAULT_PRINT_LATEX(minkmetric, "eta", "\\eta")
@@ -355,6 +395,8 @@ bool tensor::replace_contr_index(exvector::iterator self, exvector::iterator oth
 again:
        if (self_idx->is_symbolic()) {
                for (size_t i=1; i<other->nops(); i++) {
+                       if (! is_a<idx>(other->op(i)))
+                               continue;
                        const idx &other_idx = ex_to<idx>(other->op(i));
                        if (is_dummy_pair(*self_idx, other_idx)) {