Added methods for taking real and imaginary parts.

[ginac.git] / ginac / basic.h

diff --git a/ginac/basic.h b/ginac/basic.h
index 9f88d7b88946ec65a2f37add7a3cf393752803db..b08ad6693472859ccf1645abf889f1558b3f37d2 100644 (file)
--- a/ginac/basic.h
+++ b/ginac/basic.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's ABC. */
 
 /*
- *  GiNaC Copyright (C) 1999-2004 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2006 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
@@ -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_BASIC_H__
@@ -30,7 +30,6 @@
 #include <algorithm>
 
 #include "flags.h"
-#include "tinfos.h"
 #include "ptr.h"
 #include "assertion.h"
 #include "registrar.h"
@@ -48,7 +47,6 @@ class print_context;
 typedef std::vector<ex> exvector;
 typedef std::map<ex, ex, ex_is_less> exmap;
 
-
 // Define this to enable some statistical output for comparisons and hashing
 #undef GINAC_COMPARE_STATISTICS
 
@@ -83,6 +81,7 @@ extern compare_statistics_t compare_statistics;
 
 /** Function object for map(). */
 struct map_function {
+       virtual ~map_function() {}
        typedef const ex & argument_type;
        typedef ex result_type;
        virtual ex operator()(const ex & e) = 0;
@@ -107,7 +106,7 @@ class basic : public refcounted
        
        // default constructor, destructor, copy constructor and assignment operator
 protected:
-       basic() : tinfo_key(TINFO_basic), flags(0) {}
+       basic() : tinfo_key(&tinfo_static), flags(0) {}
 
 public:
        /** basic destructor, virtual because class ex will delete objects of
@@ -122,7 +121,7 @@ public:
 protected:
        /** Constructor with specified tinfo_key (used by derived classes instead
         *  of the default constructor to avoid assigning tinfo_key twice). */
-       basic(unsigned ti) : tinfo_key(ti), flags(0) {}
+       basic(tinfo_t ti) : tinfo_key(ti), flags(0) {}
        
        // new virtual functions which can be overridden by derived classes
 public: // only const functions please (may break reference counting)
@@ -161,7 +160,7 @@ public:
        virtual ex & operator[](size_t i);
 
        // pattern matching
-       virtual bool has(const ex & other) const;
+       virtual bool has(const ex & other, unsigned options = 0) const;
        virtual bool match(const ex & pattern, lst & repl_lst) const;
 protected:
        virtual bool match_same_type(const basic & other) const;
@@ -181,6 +180,7 @@ public:
        }
 
        // degree/coeff
+       virtual bool is_polynomial(const ex & var) const;
        virtual int degree(const ex & s) const;
        virtual int ldegree(const ex & s) const;
        virtual ex coeff(const ex & s, int n = 1) const;
@@ -213,10 +213,12 @@ public:
 
        // noncommutativity
        virtual unsigned return_type() const;
-       virtual unsigned return_type_tinfo() const;
+       virtual tinfo_t return_type_tinfo() const;
 
-       // complex conjugation
+       // functions for complex expressions
        virtual ex conjugate() const;
+       virtual ex real_part() const;
+       virtual ex imag_part() const;
 
        // functions that should be called from class ex only
 protected:
@@ -261,7 +263,7 @@ public:
                }
        }
 
-       unsigned tinfo() const {return tinfo_key;}
+       tinfo_t tinfo() const {return tinfo_key;}
 
        /** Set some status_flags. */
        const basic & setflag(unsigned f) const {flags |= f; return *this;}
@@ -278,7 +280,7 @@ protected:
        
        // member variables
 protected:
-       unsigned tinfo_key;                 ///< typeinfo
+       tinfo_t tinfo_key;                  ///< type info
        mutable unsigned flags;             ///< of type status_flags
        mutable unsigned hashvalue;         ///< hash value
 };
@@ -298,13 +300,11 @@ inline bool is_a(const basic &obj)
        return dynamic_cast<const T *>(&obj) != 0;
 }
 
-/** Check if obj is a T, not including base classes.  This one is just an
- *  inefficient default.  It should in all time-critical cases be overridden
- *  by template specializations that use the TINFO_* constants directly. */
+/** Check if obj is a T, not including base classes. */
 template <class T>
-inline bool is_exactly_a(const basic &obj)
+inline bool is_exactly_a(const basic & obj)
 {
-       return obj.tinfo() == T::get_class_info_static().options.get_id();
+       return obj.tinfo() == &T::tinfo_static;
 }
 
 } // namespace GiNaC