A better return_type_tinfo() mechanism.

[ginac.git] / ginac / indexed.h

diff --git a/ginac/indexed.h b/ginac/indexed.h
index 8f2779ffbf34b59be5a4c73a249fcf3a10273175..82a45c3441b4e8390b5624e72e2ca49446bad780 100644 (file)
--- a/ginac/indexed.h
+++ b/ginac/indexed.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's indexed expressions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2005 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2008 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
@@ -147,6 +147,8 @@ public:
        unsigned precedence() const {return 55;}
        bool info(unsigned inf) const;
        ex eval(int level = 0) const;
+       ex real_part() const;
+       ex imag_part() const;
        exvector get_free_indices() const;
 
 protected:
@@ -154,7 +156,7 @@ protected:
        ex thiscontainer(const exvector & v) const;
        ex thiscontainer(std::auto_ptr<exvector> vp) const;
        unsigned return_type() const;
-       unsigned return_type_tinfo() const { return op(0).return_type_tinfo(); }
+       return_type_t return_type_tinfo() const { return op(0).return_type_tinfo(); }
        ex expand(unsigned options = 0) const;
 
        // new virtual functions which can be overridden by derived classes
@@ -245,15 +247,13 @@ protected:
 
 // utility functions
 
-/** Specialization of is_exactly_a<indexed>(obj) for indexed objects. */
-template<> inline bool is_exactly_a<indexed>(const basic & obj)
-{
-       return obj.tinfo()==TINFO_indexed;
-}
-
 /** Returns all dummy indices from the expression */
 exvector get_all_dummy_indices(const ex & e);
 
+/** More reliable version of the form. The former assumes that e is an
+  * expanded epxression. */
+exvector get_all_dummy_indices_safely(const ex & e);
+
 /** Returns b with all dummy indices, which are listed in va, renamed 
  *  if modify_va is set to TRUE all dummy indices of b will be appended to va */
 ex rename_dummy_indices_uniquely(exvector & va, const ex & b, bool modify_va = false);
@@ -270,7 +270,7 @@ lst rename_dummy_indices_uniquely(const exvector & va, const exvector & vb);
 
 /** This function returns the given expression with expanded sums
  *  for all dummy index summations, where the dimensionality of 
- *  the dummy index is numeric.
+ *  the dummy index is a nonnegative integer.
  *  Optionally all indices with a variance will be substituted by 
  *  indices with the corresponding numeric values without variance.
  *