added missing minimal_dim() from 1.1 branch

[ginac.git] / ginac / idx.h

diff --git a/ginac/idx.h b/ginac/idx.h
index fd1ed47ddaac0e02427c276b028d839c953a6066..3811a4efe400123bc1d0f63303b87ec36ef3fc7b 100644 (file)
--- a/ginac/idx.h
+++ b/ginac/idx.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's indices. */
 
 /*
- *  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
@@ -85,6 +85,13 @@ public:
        /** Check whether the dimension is symbolic. */
        bool is_dim_symbolic(void) const {return !is_exactly_a<numeric>(dim);}
 
+       /** Make a new index with the same value but a different dimension. */
+       ex replace_dim(const ex & new_dim) const;
+
+       /** Return the minimum of the dimensions of this and another index.
+        *  If this is undecidable, throw an exception. */
+       ex minimal_dim(const idx & other) const;
+
 protected:
        ex value; /**< Expression that constitutes the index (numeric or symbolic name) */
        ex dim;   /**< Dimension of space (can be symbolic or numeric) */
@@ -184,27 +191,6 @@ protected:
 
 // utility functions
 
-/** Return the idx object handled by an ex.  Deprecated: use ex_to<idx>().
- *  This is unsafe: you need to check the type first. */
-inline const idx &ex_to_idx(const ex & e)
-{
-       return static_cast<const idx &>(*e.bp);
-}
-
-/** Return the varidx object handled by an ex.  Deprecated: use ex_to<varidx>().
- *  This is unsafe: you need to check the type first. */
-inline const varidx &ex_to_varidx(const ex & e)
-{
-       return static_cast<const varidx &>(*e.bp);
-}
-
-/** Return the spinidx object handled by an ex.  Deprecated: use ex_to<spinidx>().
- *  This is unsafe: you need to check the type first. */
-inline const spinidx &ex_to_spinidx(const ex & e)
-{
-       return static_cast<const spinidx &>(*e.bp);
-}
-
 /** Specialization of is_exactly_a<idx>(obj) for idx objects. */
 template<> inline bool is_exactly_a<idx>(const basic & obj)
 {
@@ -277,6 +263,11 @@ inline unsigned count_free_indices(const exvector & v)
        return free_indices.size();
 }
 
+/** Return the minimum of two index dimensions. If this is undecidable,
+ *  throw an exception. Numeric dimensions are always considered "smaller"
+ *  than symbolic dimensions. */
+ex minimal_dim(const ex & dim1, const ex & dim2);
+
 } // namespace GiNaC
 
 #endif // ndef __GINAC_IDX_H__