mention the "dummy()" function option

[ginac.git] / ginac / registrar.h

diff --git a/ginac/registrar.h b/ginac/registrar.h
index e6c083f32f98f72e60824ed3f20b892ab10c6374..384b0e7917d55b8d574ce55a71c2ea489b54c2df 100644 (file)
--- a/ginac/registrar.h
+++ b/ginac/registrar.h
@@ -25,8 +25,10 @@
 
 #include <string>
 #include <list>
+#include <vector>
 
 #include "class_info.h"
+#include "print.h"
 
 namespace GiNaC {
 
@@ -41,7 +43,7 @@ typedef container<std::list> lst;
 typedef ex (*unarch_func)(const archive_node &n, lst &sym_lst);
 
 
-/** This structure stores information about a registered GiNaC class. */
+/** This class stores information about a registered GiNaC class. */
 class registered_class_options {
 public:
        registered_class_options(const char *n, const char *p, unsigned ti, unarch_func f)
@@ -51,12 +53,42 @@ public:
        const char *get_parent_name() const { return parent_name; }
        unsigned get_id() const { return tinfo_key; }
        unarch_func get_unarch_func() const { return unarchive; }
+       const std::vector<print_functor> &get_print_dispatch_table() const { return print_dispatch_table; }
+
+       template <class Ctx, class T, class C>
+       registered_class_options & print_func(void f(const T &, const C & c, unsigned))
+       {
+               set_print_func(Ctx::get_class_info_static().options.get_id(), f);
+               return *this;
+       }
+
+       template <class Ctx, class T, class C>
+       registered_class_options & print_func(void (T::*f)(const C &, unsigned))
+       {
+               set_print_func(Ctx::get_class_info_static().options.get_id(), f);
+               return *this;
+       }
+
+       template <class Ctx>
+       registered_class_options & print_func(const print_functor & f)
+       {
+               set_print_func(Ctx::get_class_info_static().options.get_id(), f);
+               return *this;
+       }
+
+       void set_print_func(unsigned id, const print_functor & f)
+       {
+               if (id >= print_dispatch_table.size())
+                       print_dispatch_table.resize(id + 1);
+               print_dispatch_table[id] = f;
+       }
 
 private:
        const char *name;         /**< Class name. */
        const char *parent_name;  /**< Name of superclass. */
        unsigned tinfo_key;       /**< TINFO_* key. */
        unarch_func unarchive;    /**< Pointer to unarchiving function. */
+       std::vector<print_functor> print_dispatch_table; /**< Method table for print() dispatch */
 };
 
 typedef class_info<registered_class_options> registered_class_info;
@@ -66,12 +98,13 @@ typedef class_info<registered_class_options> registered_class_info;
 #define GINAC_DECLARE_REGISTERED_CLASS_NO_CTORS(classname, supername) \
 public: \
        typedef supername inherited; \
-       template <class isexaclass> friend bool is_exactly_a(const GiNaC::basic &obj); \
 private: \
        static GiNaC::registered_class_info reg_info; \
 public: \
-       virtual const GiNaC::registered_class_info &get_class_info() const { return reg_info; } \
-       virtual const char *class_name() const { return reg_info.options.get_name(); } \
+       static GiNaC::registered_class_info &get_class_info_static() { return reg_info; } \
+       virtual const GiNaC::registered_class_info &get_class_info() const { return classname::get_class_info_static(); } \
+       virtual GiNaC::registered_class_info &get_class_info() { return classname::get_class_info_static(); } \
+       virtual const char *class_name() const { return classname::get_class_info_static().options.get_name(); } \
        \
        classname(const GiNaC::archive_node &n, GiNaC::lst &sym_lst); \
        virtual void archive(GiNaC::archive_node &n) const; \
@@ -90,9 +123,9 @@ public: \
        GINAC_DECLARE_REGISTERED_CLASS_NO_CTORS(classname, supername) \
 public: \
        classname(); \
-       classname * duplicate() const { return new classname(*this); } \
+       virtual classname * duplicate() const { return new classname(*this); } \
        \
-       void accept(GiNaC::visitor & v) const \
+       virtual void accept(GiNaC::visitor & v) const \
        { \
                if (visitor *p = dynamic_cast<visitor *>(&v)) \
                        p->visit(*this); \
@@ -100,7 +133,7 @@ public: \
                        inherited::accept(v); \
        } \
 protected: \
-       int compare_same_type(const GiNaC::basic & other) const; \
+       virtual int compare_same_type(const GiNaC::basic & other) const; \
 private:
 
 /** Macro for inclusion in the implementation of each registered class. */
@@ -120,6 +153,21 @@ extern unsigned find_tinfo_key(const std::string &class_name);
 extern unarch_func find_unarch_func(const std::string &class_name);
 
 
+/** Add or replace a print method. */
+template <class Alg, class Ctx, class T, class C>
+extern void set_print_func(void f(const T &, const C & c, unsigned))
+{
+       Alg::get_class_info_static().options.set_print_func(Ctx::get_class_info_static().options.get_id(), f);
+}
+
+/** Add or replace a print method. */
+template <class Alg, class Ctx, class T, class C>
+extern void set_print_func(void (T::*f)(const C &, unsigned))
+{
+       Alg::get_class_info_static().options.set_print_func(Ctx::get_class_info_static().options.get_id(), f);
+}
+
+
 } // namespace GiNaC
 
 #endif // ndef __GINAC_REGISTRAR_H__