#include <iosfwd>
#include <string>
+#include <memory>
+
+#include "class_info.h"
namespace GiNaC {
-/*
- * The following classes remain publicly visible for compatibility
- * reasons only. New code should use the iostream manipulators defined
- * in operators.h instead.
- */
+/** This class stores information about a registered print_context class. */
+class print_context_options {
+public:
+ print_context_options(const char *n, const char *p, unsigned i)
+ : name(n), parent_name(p), id(i) {}
+
+ const char *get_name() const { return name; }
+ const char *get_parent_name() const { return parent_name; }
+ unsigned get_id() const { return id; }
+
+private:
+ const char *name; /**< Class name. */
+ const char *parent_name; /**< Name of superclass. */
+ unsigned id; /**< ID number (assigned automatically). */
+};
+
+typedef class_info<print_context_options> print_context_class_info;
/** Flags to control the behavior of a print_context. */
};
-/** Context for default (ginsh-parsable) output. */
+/** Macro for inclusion in the declaration of a print_context class.
+ * It declares some functions that are common to all classes derived
+ * from 'print_context' as well as all required stuff for the GiNaC
+ * registry. */
+#define GINAC_DECLARE_PRINT_CONTEXT(classname, supername) \
+public: \
+ typedef supername inherited; \
+ friend class function_options; \
+ friend class registered_class_options; \
+public: \
+ static const GiNaC::print_context_class_info &get_class_info_static(); \
+ virtual const GiNaC::print_context_class_info &get_class_info() const { return classname::get_class_info_static(); } \
+ virtual const char *class_name() const { return classname::get_class_info_static().options.get_name(); } \
+ \
+ classname(); \
+ virtual classname * duplicate() const { return new classname(*this); } \
+private:
+
+/** Macro for inclusion in the implementation of each print_context class. */
+#define GINAC_IMPLEMENT_PRINT_CONTEXT(classname, supername) \
+const GiNaC::print_context_class_info &classname::get_class_info_static() \
+{ \
+ static GiNaC::print_context_class_info reg_info = GiNaC::print_context_class_info(GiNaC::print_context_options(#classname, #supername, GiNaC::next_print_context_id++)); \
+ return reg_info; \
+}
+
+
+extern unsigned next_print_context_id;
+
+
+/** Base class for print_contexts. */
class print_context
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_context, void)
public:
- print_context();
print_context(std::ostream &, unsigned options = 0);
virtual ~print_context() {}
- virtual print_context * duplicate() const {return new print_context(*this);}
std::ostream & s; /**< stream to output to */
unsigned options; /**< option flags */
};
+/** Context for default (ginsh-parsable) output. */
+class print_dflt : public print_context
+{
+ GINAC_DECLARE_PRINT_CONTEXT(print_dflt, print_context)
+public:
+ print_dflt(std::ostream &, unsigned options = 0);
+};
+
/** Context for latex-parsable output. */
class print_latex : public print_context
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_latex, print_context)
public:
- print_latex();
print_latex(std::ostream &, unsigned options = 0);
- print_context * duplicate() const {return new print_latex(*this);}
};
/** Context for python pretty-print output. */
class print_python : public print_context
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_python, print_context)
public:
- print_python();
print_python(std::ostream &, unsigned options = 0);
- print_context * duplicate() const {return new print_python(*this);}
};
/** Context for python-parsable output. */
class print_python_repr : public print_context
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_python_repr, print_context)
public:
- print_python_repr();
print_python_repr(std::ostream &, unsigned options = 0);
- print_context * duplicate() const {return new print_python_repr(*this);}
};
/** Context for tree-like output for debugging. */
class print_tree : public print_context
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_tree, print_context)
public:
- print_tree(unsigned d = 4);
+ print_tree(unsigned d);
print_tree(std::ostream &, unsigned options = 0, unsigned d = 4);
- print_context * duplicate() const {return new print_tree(*this);}
const unsigned delta_indent; /**< size of indentation step */
};
/** Base context for C source output. */
class print_csrc : public print_context
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_csrc, print_context)
public:
- print_csrc();
print_csrc(std::ostream &, unsigned options = 0);
- print_context * duplicate() const {return new print_csrc(*this);}
};
/** Context for C source output using float precision. */
class print_csrc_float : public print_csrc
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_csrc_float, print_csrc)
public:
- print_csrc_float();
print_csrc_float(std::ostream &, unsigned options = 0);
- print_context * duplicate() const {return new print_csrc_float(*this);}
};
/** Context for C source output using double precision. */
class print_csrc_double : public print_csrc
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_csrc_double, print_csrc)
public:
- print_csrc_double();
print_csrc_double(std::ostream &, unsigned options = 0);
- print_context * duplicate() const {return new print_csrc_double(*this);}
};
/** Context for C source output using CLN numbers. */
class print_csrc_cl_N : public print_csrc
{
+ GINAC_DECLARE_PRINT_CONTEXT(print_csrc_cl_N, print_csrc)
public:
- print_csrc_cl_N();
print_csrc_cl_N(std::ostream &, unsigned options = 0);
- print_context * duplicate() const {return new print_csrc_cl_N(*this);}
};
/** Check if obj is a T, including base classes. */
template <class T>
inline bool is_a(const print_context & obj)
-{ return dynamic_cast<const T *>(&obj)!=0; }
+{ return dynamic_cast<const T *>(&obj) != 0; }
+
+
+class basic;
+
+/** Base class for print_functor handlers */
+class print_functor_impl {
+public:
+ virtual ~print_functor_impl() {}
+ virtual print_functor_impl *duplicate() const = 0;
+ virtual void operator()(const basic & obj, const print_context & c, unsigned level) const = 0;
+};
+
+/** print_functor handler for pointer-to-functions of class T, context type C */
+template <class T, class C>
+class print_ptrfun_handler : public print_functor_impl {
+public:
+ typedef void (*F)(const T &, const C &, unsigned);
+
+ print_ptrfun_handler(F f_) : f(f_) {}
+ print_ptrfun_handler *duplicate() const { return new print_ptrfun_handler(*this); }
+
+ void operator()(const basic & obj, const print_context & c, unsigned level) const
+ {
+ // Call the supplied function
+ f(dynamic_cast<const T &>(obj), dynamic_cast<const C &>(c), level);
+ }
+
+private:
+ F f;
+};
+
+/** print_functor handler for member functions of class T, context type C */
+template <class T, class C>
+class print_memfun_handler : public print_functor_impl {
+public:
+ typedef void (T::*F)(const C & c, unsigned level);
+
+ print_memfun_handler(F f_) : f(f_) {}
+ print_memfun_handler *duplicate() const { return new print_memfun_handler(*this); }
+
+ void operator()(const basic & obj, const print_context & c, unsigned level) const
+ {
+ // Call the supplied member function
+ return (dynamic_cast<const T &>(obj).*f)(dynamic_cast<const C &>(c), level);
+ }
+
+private:
+ F f;
+};
+
+/** This class represents a print method for a certain algebraic class and
+ * print_context type. Its main purpose is to hide the difference between
+ * member functions and nonmember functions behind one unified operator()
+ * interface. print_functor has value semantics and acts as a smart pointer
+ * (with deep copy) to a class derived from print_functor_impl which
+ * implements the actual function call. */
+class print_functor {
+public:
+ print_functor() : impl(0) {}
+ print_functor(const print_functor & other) : impl(other.impl.get() ? other.impl->duplicate() : 0) {}
+ print_functor(std::auto_ptr<print_functor_impl> impl_) : impl(impl_) {}
+
+ template <class T, class C>
+ print_functor(void f(const T &, const C &, unsigned)) : impl(new print_ptrfun_handler<T, C>(f)) {}
+
+ template <class T, class C>
+ print_functor(void (T::*f)(const C &, unsigned)) : impl(new print_memfun_handler<T, C>(f)) {}
+
+ print_functor & operator=(const print_functor & other)
+ {
+ if (this != &other) {
+ print_functor_impl *p = other.impl.get();
+ impl.reset(p ? other.impl->duplicate() : 0);
+ }
+ return *this;
+ }
+
+ void operator()(const basic & obj, const print_context & c, unsigned level) const
+ {
+ (*impl)(obj, c, level);
+ }
+
+ bool is_valid() const { return impl.get(); }
+
+private:
+ std::auto_ptr<print_functor_impl> impl;
+};
+
} // namespace GiNaC
git://www.ginac.de / ginac.git / blobdiff