Added a document about the coding conventions used in GiNaC. Corrections,

[ginac.git] / ginac / basic.h

diff --git a/ginac/basic.h b/ginac/basic.h
index 90e3faffe2cff79ce3d838d85493bc039a683f94..12a958c657ee317ebe32aa9706fd771f84066fad 100644 (file)
--- a/ginac/basic.h
+++ b/ginac/basic.h
@@ -31,6 +31,7 @@
 
 #include "flags.h"
 #include "tinfos.h"
+#include "ptr.h"
 #include "assertion.h"
 #include "registrar.h"
 
@@ -43,7 +44,6 @@ class numeric;
 class relational;
 class archive_node;
 class print_context;
-template <class> class ptr;
 
 typedef std::vector<ex> exvector;
 typedef std::map<ex, ex, ex_is_less> exmap;
@@ -66,25 +66,23 @@ protected:
 };
 
 
-/** This class is the ABC (abstract base class) of GiNaC's class hierarchy.
- *  It is responsible for the reference counting. */
-class basic
+/** This class is the ABC (abstract base class) of GiNaC's class hierarchy. */
+class basic : public refcounted
 {
        GINAC_DECLARE_REGISTERED_CLASS_NO_CTORS(basic, void)
        
        friend class ex;
-       friend class ptr<basic>;
        
        // default constructor, destructor, copy constructor and assignment operator
 protected:
-       basic() : tinfo_key(TINFO_basic), flags(0), refcount(0) {}
+       basic() : tinfo_key(TINFO_basic), flags(0) {}
 
 public:
        /** basic destructor, virtual because class ex will delete objects of
         *  derived classes via a basic*. */
        virtual ~basic()
        {
-               GINAC_ASSERT((!(flags & status_flags::dynallocated))||(refcount==0));
+               GINAC_ASSERT((!(flags & status_flags::dynallocated)) || (get_refcount() == 0));
        }
        basic(const basic & other);
        const basic & operator=(const basic & other);
@@ -92,7 +90,7 @@ 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), refcount(0) {}
+       basic(unsigned 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)
@@ -166,8 +164,8 @@ public:
 
        // rational functions
        virtual ex normal(exmap & repl, exmap & rev_lookup, int level = 0) const;
-       virtual ex to_rational(lst &repl_lst) const;
-       virtual ex to_polynomial(lst &repl_lst) const;
+       virtual ex to_rational(exmap & repl) const;
+       virtual ex to_polynomial(exmap & repl) const;
 
        // polynomial algorithms
        virtual numeric integer_content() const;
@@ -192,6 +190,19 @@ protected: // functions that should be called from class ex only
        
        // non-virtual functions in this class
 public:
+       /** Like print(), but dispatch to the specified class. Can be used by
+        *  implementations of print methods to dispatch to the method of the
+        *  superclass.
+        *
+        *  @see basic::print */
+       template <class T>
+       void print_dispatch(const print_context & c, unsigned level) const
+       {
+               print_dispatch(T::get_class_info_static(), c, level);
+       }
+
+       void print_dispatch(const registered_class_info & ri, const print_context & c, unsigned level) 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;
@@ -208,14 +219,16 @@ public:
 
 protected:
        void ensure_if_modifiable() const;
+
+       void do_print(const print_context & c, unsigned level) const;
+       void do_print_tree(const print_tree & c, unsigned level) const;
+       void do_print_python_repr(const print_python_repr & c, unsigned level) const;
        
        // member variables
 protected:
        unsigned tinfo_key;                 ///< typeinfo
        mutable unsigned flags;             ///< of type status_flags
        mutable unsigned hashvalue;         ///< hash value
-private:
-       size_t refcount;                    ///< reference counter, managed by ptr<basic>
 };
 
 
@@ -239,7 +252,7 @@ inline bool is_a(const basic &obj)
 template <class T>
 inline bool is_exactly_a(const basic &obj)
 {
-       return obj.tinfo() == T::reg_info.options.get_id();
+       return obj.tinfo() == T::get_class_info_static().options.get_id();
 }
 
 } // namespace GiNaC