Allow, optionally, indices to be substituted by things that are not indices.

[ginac.git] / ginac / flags.h

diff --git a/ginac/flags.h b/ginac/flags.h
index af4144eefd3a983c727fe926899d57ac7fc9f614..8ef1c0ac07e03a72f8482a431b886543b3bbfc1a 100644 (file)
--- a/ginac/flags.h
+++ b/ginac/flags.h
@@ -17,7 +17,7 @@
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
 #ifndef __GINAC_FLAGS_H__
@@ -34,6 +34,14 @@ public:
        };
 };
 
+/** Flags to control the behavior of has(). */
+class has_options {
+public:
+       enum {
+               algebraic = 0x0001,              ///< enable algebraic matching
+       };
+};
+
 /** Flags to control the behavior of subs(). */
 class subs_options {
 public:
@@ -42,8 +50,13 @@ public:
                subs_no_pattern = 0x0001, // for backwards compatibility
                algebraic = 0x0002,              ///< enable algebraic substitutions
                subs_algebraic = 0x0002,  // for backwards compatibility
-        pattern_is_product = 0x0004,     ///< used internally by expairseq::subschildren()
-        pattern_is_not_product = 0x0008  ///< used internally by expairseq::subschildren()
+               pattern_is_product = 0x0004,     ///< used internally by expairseq::subschildren()
+               pattern_is_not_product = 0x0008, ///< used internally by expairseq::subschildren()
+               no_index_renaming = 0x0010,
+               // To indicate that we want to substitue an index by something that is
+               // is not an index. Without this flag the index value would be
+               // substituted in that case.
+               really_subs_idx = 0x0020
        };
 };
 
@@ -52,7 +65,8 @@ class domain {
 public:
        enum {
                complex,
-               real
+               real,
+               positive
        };
 };
 
@@ -187,7 +201,7 @@ public:
 class info_flags {
 public:
        enum {
-               // answered by class numeric
+               // answered by class numeric and symbols/constants in particular domains
                numeric,
                real,
                rational,