X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fsymbol.h;h=eefd27c80672583ab37f5ae1be2b544fa0b805c2;hp=0b6844a65d700a98706b104b5ce519a18a456797;hb=e08cda1854bdb82f6706ec269233577690ae00e4;hpb=dfa384d36f986f5f8d7dbb5e20c0d3a63af42cd9 diff --git a/ginac/symbol.h b/ginac/symbol.h index 0b6844a6..eefd27c8 100644 --- a/ginac/symbol.h +++ b/ginac/symbol.h @@ -3,7 +3,7 @@ * Interface to GiNaC's symbolic objects. */ /* - * GiNaC Copyright (C) 1999-2003 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2010 Johannes Gutenberg University Mainz, Germany * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -17,60 +17,50 @@ * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -#ifndef __GINAC_SYMBOL_H__ -#define __GINAC_SYMBOL_H__ +#ifndef GINAC_SYMBOL_H +#define GINAC_SYMBOL_H -#include #include "basic.h" #include "ex.h" #include "ptr.h" +#include "archive.h" + +#include +#include namespace GiNaC { /** Basic CAS symbol. It has a name because it must know how to output itself. - * It may be assigned an expression, but this feature is only intended for - * programs like 'ginsh' that want to associate symbols with expressions. - * If you want to replace symbols by expressions in your code, you should - * use ex::subs() or use objects of class ex instead of class symbol in the - * first place. */ + */ class symbol : public basic { GINAC_DECLARE_REGISTERED_CLASS(symbol, basic) - -// types - - /** Symbols as keys to expressions - only for ginsh. */ - class assigned_ex_info : public refcounted { - public: - assigned_ex_info() throw(); ///< Default ctor - bool is_assigned; ///< True if there is an expression assigned - ex assigned_expression; ///< The actual expression - }; - -// member functions - // other constructors public: explicit symbol(const std::string & initname); symbol(const std::string & initname, const std::string & texname); - symbol(const std::string & initname, unsigned rt, unsigned rtt); - symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt); // functions overriding virtual functions from base classes public: bool info(unsigned inf) const; - ex eval(int level = 0) const; + ex eval(int level = 0) const { return *this; } // for performance reasons ex evalf(int level = 0) const { return *this; } // overwrites basic::evalf() for performance reasons ex series(const relational & s, int order, unsigned options = 0) const; ex subs(const exmap & m, unsigned options = 0) const { return subs_one_level(m, options); } // overwrites basic::subs() for performance reasons ex normal(exmap & repl, exmap & rev_lookup, int level = 0) const; ex to_rational(exmap & repl) const; ex to_polynomial(exmap & repl) const; - unsigned return_type() const { return ret_type; } - unsigned return_type_tinfo() const { return ret_type_tinfo; } + ex conjugate() const; + ex real_part() const; + ex imag_part() const; + bool is_polynomial(const ex & var) const; + /** Save (a.k.a. serialize) object into archive. */ + void archive(archive_node& n) const; + /** Read (a.k.a. deserialize) object from archive. */ + void read_archive(const archive_node& n, lst& syms); protected: ex derivative(const symbol & s) const; bool is_equal_same_type(const basic & other) const; @@ -78,45 +68,60 @@ protected: // non-virtual functions in this class public: - void assign(const ex & value); - void unassign(); void set_name(const std::string & n) { name = n; } std::string get_name() const { return name; } + virtual unsigned get_domain() const { return domain::complex; } protected: void do_print(const print_context & c, unsigned level) const; void do_print_latex(const print_latex & 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; -private: - std::string & autoname_prefix(); - std::string default_TeX_name() const; // member variables protected: - ptr asexinfop; ///< assigned expression, only for private use by ginsh unsigned serial; ///< unique serial number for comparison std::string name; ///< printname of this symbol std::string TeX_name; ///< LaTeX name of this symbol - unsigned ret_type; ///< value returned by return_type() - unsigned ret_type_tinfo; ///< value returned by return_type_tinfo() private: static unsigned next_serial; }; +GINAC_DECLARE_UNARCHIVER(symbol); + +/** Specialization of symbol to real domain */ +class realsymbol : public symbol +{ +public: + realsymbol(); + explicit realsymbol(const std::string & initname); + realsymbol(const std::string & initname, const std::string & texname); + + unsigned get_domain() const { return domain::real; } -// utility functions + ex conjugate() const { return *this; } + ex real_part() const { return *this; } + ex imag_part() const { return 0; } + + realsymbol* duplicate() const { return new realsymbol(*this); } +}; +GINAC_DECLARE_UNARCHIVER(realsymbol); -/** Specialization of is_exactly_a(obj) for symbol objects. */ -template<> inline bool is_exactly_a(const basic & obj) + +/** Specialization of symbol to real domain */ +class possymbol : public realsymbol { - return obj.tinfo()==TINFO_symbol; -} +public: + possymbol(); + explicit possymbol(const std::string & initname); + possymbol(const std::string & initname, const std::string & texname); -// wrapper functions around member functions -inline void unassign(symbol & symarg) -{ symarg.unassign(); } + unsigned get_domain() const { return domain::positive; } + + possymbol* duplicate() const { return new possymbol(*this); } +}; +GINAC_DECLARE_UNARCHIVER(possymbol); } // namespace GiNaC -#endif // ndef __GINAC_SYMBOL_H__ +#endif // ndef GINAC_SYMBOL_H