3 * Definition of helper classes for expression output. */
6 * GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #ifndef __GINAC_PRINT_H__
24 #define __GINAC_PRINT_H__
30 #include "class_info.h"
35 /** This class stores information about a registered print_context class. */
36 class print_context_options {
38 print_context_options(const char *n, const char *p, unsigned i)
39 : name(n), parent_name(p), id(i) {}
41 const char *get_name() const { return name; }
42 const char *get_parent_name() const { return parent_name; }
43 unsigned get_id() const { return id; }
46 const char *name; /**< Class name. */
47 const char *parent_name; /**< Name of superclass. */
48 unsigned id; /**< ID number (assigned automatically). */
51 typedef class_info<print_context_options> print_context_class_info;
54 /** Flags to control the behavior of a print_context. */
58 print_index_dimensions = 0x0001 ///< print the dimensions of indices
63 /** Macro for inclusion in the declaration of a print_context class.
64 * It declares some functions that are common to all classes derived
65 * from 'print_context' as well as all required stuff for the GiNaC
67 #define GINAC_DECLARE_PRINT_CONTEXT(classname, supername) \
69 typedef supername inherited; \
70 friend class function_options; \
71 friend class registered_class_options; \
73 static GiNaC::print_context_class_info reg_info; \
75 virtual const GiNaC::print_context_class_info &get_class_info() const { return reg_info; } \
76 virtual const char *class_name() const { return reg_info.options.get_name(); } \
79 classname * duplicate() const { return new classname(*this); } \
82 /** Macro for inclusion in the implementation of each print_context class. */
83 #define GINAC_IMPLEMENT_PRINT_CONTEXT(classname, supername) \
84 GiNaC::print_context_class_info classname::reg_info = GiNaC::print_context_class_info(print_context_options(#classname, #supername, next_print_context_id++));
86 extern unsigned next_print_context_id;
89 /** Base class for print_contexts. */
92 GINAC_DECLARE_PRINT_CONTEXT(print_context, void)
94 print_context(std::ostream &, unsigned options = 0);
95 virtual ~print_context() {}
97 std::ostream & s; /**< stream to output to */
98 unsigned options; /**< option flags */
101 /** Context for default (ginsh-parsable) output. */
102 class print_dflt : public print_context
104 GINAC_DECLARE_PRINT_CONTEXT(print_dflt, print_context)
106 print_dflt(std::ostream &, unsigned options = 0);
109 /** Context for latex-parsable output. */
110 class print_latex : public print_context
112 GINAC_DECLARE_PRINT_CONTEXT(print_latex, print_context)
114 print_latex(std::ostream &, unsigned options = 0);
117 /** Context for python pretty-print output. */
118 class print_python : public print_context
120 GINAC_DECLARE_PRINT_CONTEXT(print_python, print_context)
122 print_python(std::ostream &, unsigned options = 0);
125 /** Context for python-parsable output. */
126 class print_python_repr : public print_context
128 GINAC_DECLARE_PRINT_CONTEXT(print_python_repr, print_context)
130 print_python_repr(std::ostream &, unsigned options = 0);
133 /** Context for tree-like output for debugging. */
134 class print_tree : public print_context
136 GINAC_DECLARE_PRINT_CONTEXT(print_tree, print_context)
138 print_tree(unsigned d);
139 print_tree(std::ostream &, unsigned options = 0, unsigned d = 4);
141 const unsigned delta_indent; /**< size of indentation step */
144 /** Base context for C source output. */
145 class print_csrc : public print_context
147 GINAC_DECLARE_PRINT_CONTEXT(print_csrc, print_context)
149 print_csrc(std::ostream &, unsigned options = 0);
152 /** Context for C source output using float precision. */
153 class print_csrc_float : public print_csrc
155 GINAC_DECLARE_PRINT_CONTEXT(print_csrc_float, print_csrc)
157 print_csrc_float(std::ostream &, unsigned options = 0);
160 /** Context for C source output using double precision. */
161 class print_csrc_double : public print_csrc
163 GINAC_DECLARE_PRINT_CONTEXT(print_csrc_double, print_csrc)
165 print_csrc_double(std::ostream &, unsigned options = 0);
168 /** Context for C source output using CLN numbers. */
169 class print_csrc_cl_N : public print_csrc
171 GINAC_DECLARE_PRINT_CONTEXT(print_csrc_cl_N, print_csrc)
173 print_csrc_cl_N(std::ostream &, unsigned options = 0);
176 /** Check if obj is a T, including base classes. */
178 inline bool is_a(const print_context & obj)
179 { return dynamic_cast<const T *>(&obj) != 0; }
184 /** Base class for print_functor handlers */
185 class print_functor_impl {
187 virtual ~print_functor_impl() {}
188 virtual print_functor_impl *duplicate() const = 0;
189 virtual void operator()(const basic & obj, const print_context & c, unsigned level) const = 0;
192 /** print_functor handler for pointer-to-functions of class T, context type C */
193 template <class T, class C>
194 class print_ptrfun_handler : public print_functor_impl {
196 typedef void (*F)(const T &, const C &, unsigned);
198 print_ptrfun_handler(F f_) : f(f_) {}
199 print_ptrfun_handler *duplicate() const { return new print_ptrfun_handler(*this); }
201 void operator()(const basic & obj, const print_context & c, unsigned level) const
203 // Call the supplied function
204 f(dynamic_cast<const T &>(obj), dynamic_cast<const C &>(c), level);
211 /** print_functor handler for member functions of class T, context type C */
212 template <class T, class C>
213 class print_memfun_handler : public print_functor_impl {
215 typedef void (T::*F)(const C & c, unsigned level);
217 print_memfun_handler(F f_) : f(f_) {}
218 print_memfun_handler *duplicate() const { return new print_memfun_handler(*this); }
220 void operator()(const basic & obj, const print_context & c, unsigned level) const
222 // Call the supplied member function
223 return (dynamic_cast<const T &>(obj).*f)(dynamic_cast<const C &>(c), level);
230 /** This class represents a print method for a certain algebraic class and
231 * print_context type. Its main purpose is to hide the difference between
232 * member functions and nonmember functions behind one unified operator()
233 * interface. print_functor has value semantics and acts as a smart pointer
234 * (with deep copy) to a class derived from print_functor_impl which
235 * implements the actual function call. */
236 class print_functor {
238 print_functor() : impl(0) {}
239 print_functor(const print_functor & other) : impl(other.impl.get() ? other.impl->duplicate() : 0) {}
240 print_functor(std::auto_ptr<print_functor_impl> impl_) : impl(impl_) {}
242 template <class T, class C>
243 print_functor(void f(const T &, const C &, unsigned)) : impl(new print_ptrfun_handler<T, C>(f)) {}
245 template <class T, class C>
246 print_functor(void (T::*f)(const C &, unsigned)) : impl(new print_memfun_handler<T, C>(f)) {}
248 print_functor & operator=(const print_functor & other)
250 if (this != &other) {
251 print_functor_impl *p = other.impl.get();
252 impl.reset(p ? other.impl->duplicate() : 0);
257 void operator()(const basic & obj, const print_context & c, unsigned level) const
259 (*impl)(obj, c, level);
262 bool is_valid() const { return impl.get(); }
265 std::auto_ptr<print_functor_impl> impl;
271 #endif // ndef __GINAC_BASIC_H__