Univariate Hensel lifting now uses upoly.

[ginac.git] / ginac / basic.h

diff --git a/ginac/basic.h b/ginac/basic.h
index ffc508dbee0dd48ae4b4d6e18b18b96a4f68b1da..51e0e909336f5a6d0791e6b6aae595194fcf1eb0 100644 (file)
--- a/ginac/basic.h
+++ b/ginac/basic.h
@@ -27,6 +27,7 @@
 #include <vector>
 #include <set>
 #include <map>
+#include <typeinfo> // for typeid
 // CINT needs <algorithm> to work properly with <vector>
 #include <algorithm>
 
@@ -108,7 +109,7 @@ class basic : public refcounted
        
        // default constructor, destructor, copy constructor and assignment operator
 protected:
-       basic() : tinfo_key(&tinfo_static), flags(0) {}
+       basic() : flags(0) {}
 
 public:
        /** basic destructor, virtual because class ex will delete objects of
@@ -121,10 +122,6 @@ public:
        const basic & operator=(const basic & other);
 
 protected:
-       /** Constructor with specified tinfo_key (used by derived classes instead
-        *  of the default constructor to avoid assigning tinfo_key twice). */
-       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)
 
@@ -215,7 +212,7 @@ public:
 
        // noncommutativity
        virtual unsigned return_type() const;
-       virtual tinfo_t return_type_tinfo() const;
+       virtual return_type_t return_type_tinfo() const;
 
        // functions for complex expressions
        virtual ex conjugate() const;
@@ -244,6 +241,23 @@ public:
 
        void print_dispatch(const registered_class_info & ri, const print_context & c, unsigned level) const;
 
+       /** Save (serialize) the object into archive node.
+        *
+        * Losely speaking, this method turns an expression into a byte
+        * stream (which can be saved and restored later on, or sent via
+        * network, etc.)
+        */
+       virtual void archive(archive_node& n) const;
+       /** Load (deserialize) the object from an archive node.
+        *
+        *  @note This method is essentially a constructor. However,
+        *  constructors can't be virtual. So, if unarchiving routines
+        *  are implemented as constructors one would need to define such
+        *  a constructor in every class, even if all it does is simply
+        *  calling constructor of a superclass.
+        */
+       virtual void read_archive(const archive_node& n, lst& syms); // no const
+
        ex subs_one_level(const exmap & m, unsigned options) const;
        ex diff(const symbol & s, unsigned nth = 1) const;
        int compare(const basic & other) const;
@@ -265,8 +279,6 @@ public:
                }
        }
 
-       tinfo_t tinfo() const {return tinfo_key;}
-
        /** Set some status_flags. */
        const basic & setflag(unsigned f) const {flags |= f; return *this;}
 
@@ -282,7 +294,6 @@ protected:
        
        // member variables
 protected:
-       tinfo_t tinfo_key;                  ///< type info
        mutable unsigned flags;             ///< of type status_flags
        mutable unsigned hashvalue;         ///< hash value
 };
@@ -306,7 +317,7 @@ inline bool is_a(const basic &obj)
 template <class T>
 inline bool is_exactly_a(const basic & obj)
 {
-       return obj.tinfo() == &T::tinfo_static;
+       return typeid(T) == typeid(obj);
 }
 
 } // namespace GiNaC