Make it possible to override info() for functions.

[ginac.git] / ginac / flags.h

diff --git a/ginac/flags.h b/ginac/flags.h
index ef6767060e05103cd9d3f34a8bd29fde8ab09b61..3d398cf18619c6d0f5489c319ce48622b72591d3 100644 (file)
--- a/ginac/flags.h
+++ b/ginac/flags.h
@@ -3,7 +3,7 @@
  *  Collection of all flags used through the GiNaC framework. */
 
 /*
- *  GiNaC Copyright (C) 1999-2008 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2011 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
@@ -20,8 +20,8 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#ifndef __GINAC_FLAGS_H__
-#define __GINAC_FLAGS_H__
+#ifndef GINAC_FLAGS_H
+#define GINAC_FLAGS_H
 
 namespace GiNaC {
 
@@ -196,7 +196,10 @@ public:
                hash_calculated = 0x0008, ///< .calchash() has already done its job
                not_shareable   = 0x0010, ///< don't share instances of this object between different expressions unless explicitly asked to (used by ex::compare())
                has_indices     = 0x0020,
-               has_no_indices  = 0x0040  // ! (has_indices || has_no_indices) means "don't know"
+               has_no_indices  = 0x0040, // ! (has_indices || has_no_indices) means "don't know"
+               is_positive     = 0x0080,
+               is_negative     = 0x0100,
+               purely_indefinite = 0x0200  // If set in a mul, then it does not contains any terms with determined signs, used in power::expand()
        };
 };
 
@@ -204,7 +207,7 @@ public:
 class info_flags {
 public:
        enum {
-               // answered by class numeric and symbols/constants in particular domains
+               // answered by class numeric, add, mul, function and symbols/constants in particular domains
                numeric,
                real,
                rational,
@@ -256,7 +259,10 @@ public:
                idx,
 
                // answered by classes numeric, symbol, add, mul, power
-               expanded
+               expanded,
+
+               // is meaningful for mul only
+               indefinite
        };
 };
 
@@ -281,6 +287,15 @@ public:
        };
 };
 
+/** Flags to control the polynomial factorization. */
+class factor_options {
+public:
+       enum {
+               polynomial = 0x0000, ///< factor only expressions that are polynomials
+               all        = 0x0001  ///< factor all polynomial subexpressions
+       };
+};
+
 } // namespace GiNaC
 
-#endif // ndef __GINAC_FLAGS_H__
+#endif // ndef GINAC_FLAGS_H