X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fsymbol.h;h=91a9982a0c3a20519e244dfe65e8e1e5fa33eebc;hp=707aedb1d7981bc02741adb77c888e6add4d6c30;hb=7c8f8dae79ccf891b56167d75b73e1fd73937a6d;hpb=2b50fb076383406241bdc206abbb1a86aa6e0399 diff --git a/ginac/symbol.h b/ginac/symbol.h index 707aedb1..91a9982a 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) 1999-2017 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 @@ -17,109 +17,125 @@ * * 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 { - friend class ptr; - public: - assigned_ex_info(); ///< Default ctor - bool is_assigned; ///< True if there is an expression assigned - ex assigned_expression; ///< The actual expression - private: - size_t refcount; ///< Reference counter, managed by ptr - }; - -// 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 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(lst &repl_lst) const; - ex to_polynomial(lst &repl_lst) const; - unsigned return_type() const { return ret_type; } - unsigned return_type_tinfo() const { return ret_type_tinfo; } + bool info(unsigned inf) const override; + ex eval() const override { return *this; } // for performance reasons + ex evalf() const override { return *this; } // overwrites basic::evalf() for performance reasons + ex series(const relational & s, int order, unsigned options = 0) const override; + ex subs(const exmap & m, unsigned options = 0) const override { return subs_one_level(m, options); } // overwrites basic::subs() for performance reasons + ex normal(exmap & repl, exmap & rev_lookup) const override; + ex to_rational(exmap & repl) const override; + ex to_polynomial(exmap & repl) const override; + ex conjugate() const override; + ex real_part() const override; + ex imag_part() const override; + bool is_polynomial(const ex & var) const override; + /** Save (a.k.a. serialize) object into archive. */ + void archive(archive_node& n) const override; + /** Read (a.k.a. deserialize) object from archive. */ + void read_archive(const archive_node& n, lst& syms) override; protected: - ex derivative(const symbol & s) const; - bool is_equal_same_type(const basic & other) const; - unsigned calchash() const; + ex derivative(const symbol & s) const override; + bool is_equal_same_type(const basic & other) const override; + unsigned calchash() const override; + + // new virtual functions which can be overridden by derived classes +public: + virtual unsigned get_domain() const { return domain::complex; } // 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; } + void set_TeX_name(const std::string & n) { TeX_name = n; } + std::string get_name() const; 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 + mutable 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); -// utility functions +/** 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 override { return domain::real; } + + ex conjugate() const override { return *this; } + ex real_part() const override { return *this; } + ex imag_part() const override { return 0; } + + realsymbol* duplicate() const override + { + realsymbol * bp = new realsymbol(*this); + bp->setflag(status_flags::dynallocated); + return bp; + } +}; +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 positive 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 override { return domain::positive; } + + possymbol* duplicate() const override + { + possymbol * bp = new possymbol(*this); + bp->setflag(status_flags::dynallocated); + return bp; + } +}; +GINAC_DECLARE_UNARCHIVER(possymbol); } // namespace GiNaC -#endif // ndef __GINAC_SYMBOL_H__ +#endif // ndef GINAC_SYMBOL_H