3 * Interface to GiNaC's symbolic objects. */
6 * GiNaC Copyright (C) 1999-2011 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef GINAC_SYMBOL_H
24 #define GINAC_SYMBOL_H
36 /** Basic CAS symbol. It has a name because it must know how to output itself.
38 class symbol : public basic
40 GINAC_DECLARE_REGISTERED_CLASS(symbol, basic)
43 explicit symbol(const std::string & initname);
44 symbol(const std::string & initname, const std::string & texname);
46 // functions overriding virtual functions from base classes
48 bool info(unsigned inf) const;
49 ex eval(int level = 0) const { return *this; } // for performance reasons
50 ex evalf(int level = 0) const { return *this; } // overwrites basic::evalf() for performance reasons
51 ex series(const relational & s, int order, unsigned options = 0) const;
52 ex subs(const exmap & m, unsigned options = 0) const { return subs_one_level(m, options); } // overwrites basic::subs() for performance reasons
53 ex normal(exmap & repl, exmap & rev_lookup, int level = 0) const;
54 ex to_rational(exmap & repl) const;
55 ex to_polynomial(exmap & repl) const;
59 bool is_polynomial(const ex & var) const;
60 /** Save (a.k.a. serialize) object into archive. */
61 void archive(archive_node& n) const;
62 /** Read (a.k.a. deserialize) object from archive. */
63 void read_archive(const archive_node& n, lst& syms);
65 ex derivative(const symbol & s) const;
66 bool is_equal_same_type(const basic & other) const;
67 unsigned calchash() const;
69 // non-virtual functions in this class
71 void set_name(const std::string & n) { name = n; }
72 std::string get_name() const;
73 virtual unsigned get_domain() const { return domain::complex; }
75 void do_print(const print_context & c, unsigned level) const;
76 void do_print_latex(const print_latex & c, unsigned level) const;
77 void do_print_tree(const print_tree & c, unsigned level) const;
78 void do_print_python_repr(const print_python_repr & c, unsigned level) const;
83 unsigned serial; ///< unique serial number for comparison
84 mutable std::string name; ///< printname of this symbol
85 std::string TeX_name; ///< LaTeX name of this symbol
87 static unsigned next_serial;
89 GINAC_DECLARE_UNARCHIVER(symbol);
92 /** Specialization of symbol to real domain */
93 class realsymbol : public symbol
97 explicit realsymbol(const std::string & initname);
98 realsymbol(const std::string & initname, const std::string & texname);
100 unsigned get_domain() const { return domain::real; }
102 ex conjugate() const { return *this; }
103 ex real_part() const { return *this; }
104 ex imag_part() const { return 0; }
106 realsymbol* duplicate() const { return new realsymbol(*this); }
108 GINAC_DECLARE_UNARCHIVER(realsymbol);
111 /** Specialization of symbol to real positive domain */
112 class possymbol : public realsymbol
116 explicit possymbol(const std::string & initname);
117 possymbol(const std::string & initname, const std::string & texname);
119 unsigned get_domain() const { return domain::positive; }
121 possymbol* duplicate() const { return new possymbol(*this); }
123 GINAC_DECLARE_UNARCHIVER(possymbol);
127 #endif // ndef GINAC_SYMBOL_H