X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fsymbol.h;h=3caa24e45c500c2943a6d8b6be7a57586483ac3f;hp=1f494cf2c5ceb4f8ea2fe1d3630df82564c75ec0;hb=e9b5729311fcd5572d806f5df2e645e1845603e5;hpb=239e9d2ced6571dc0ca0d875234ec9d8df418827 diff --git a/ginac/symbol.h b/ginac/symbol.h index 1f494cf2..3caa24e4 100644 --- a/ginac/symbol.h +++ b/ginac/symbol.h @@ -3,7 +3,7 @@ * Interface to GiNaC's symbolic objects. */ /* - * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2008 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 @@ -17,116 +17,133 @@ * * 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__ #include +#include #include "basic.h" #include "ex.h" +#include "ptr.h" 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_NO_CTORS(symbol, basic) - -// types - - /** Symbols as keys to expressions - this is deprecated. */ - class assigned_ex_info { - public: - assigned_ex_info(); ///< Default ctor - bool is_assigned; ///< True if there is an expression assigned - ex assigned_expression; ///< The actual expression - unsigned refcount; ///< Reference counter - }; - + GINAC_DECLARE_REGISTERED_CLASS(symbol, basic) + + friend class realsymbol; + friend class possymbol; + // member functions - // default ctor, dtor, copy ctor assignment operator and helpers + // other constructors public: - symbol(); - ~symbol() - { - /*debugmsg("symbol dtor", LOGLEVEL_DESTRUCT);*/ - destroy(false); - } - symbol(const symbol & other); -protected: - void copy(const symbol & other); - void destroy(bool call_parent); - - // other ctors -public: - explicit symbol(const std::string & initname); + explicit symbol(const std::string & initname, unsigned domain = domain::complex); + symbol(const std::string & initname, const std::string & texname, unsigned domain = domain::complex); + symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned domain); + symbol(const std::string & initname, unsigned rt, tinfo_t rtt, unsigned domain = domain::complex); + symbol(const std::string & initname, const std::string & texname, unsigned rt, tinfo_t rtt, unsigned domain = domain::complex); // functions overriding virtual functions from base classes public: - basic * duplicate() const; - void print(const print_context & c, unsigned level = 0) const; bool info(unsigned inf) const; - ex expand(unsigned options = 0) const; - bool has(const ex & other) const; - int degree(const ex & s) const; - int ldegree(const ex & s) const; - ex coeff(const ex & s, int n = 1) 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 normal(lst &sym_lst, lst &repl_lst, int level = 0) const; - ex to_rational(lst &repl_lst) 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; } + tinfo_t 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; protected: ex derivative(const symbol & s) const; - int compare_same_type(const basic & other) const; bool is_equal_same_type(const basic & other) const; - unsigned return_type(void) const; - unsigned return_type_tinfo(void) const; - unsigned calchash(void) const; + unsigned calchash() const; // non-virtual functions in this class public: - void assign(const ex & value); - void unassign(void); void set_name(const std::string & n) { name = n; } - std::string get_name(void) const { return name; } + std::string get_name() const { return name; } + unsigned get_domain() const { return domain; } +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(void); + std::string & autoname_prefix(); + std::string default_TeX_name() const; // member variables protected: - assigned_ex_info * asexinfop; ///< ptr to assigned expression, deprecated - unsigned serial; ///< unique serial number for comparison - std::string name; ///< printname of this symbol + unsigned serial; ///< unique serial number for comparison + std::string name; ///< printname of this symbol + std::string TeX_name; ///< LaTeX name of this symbol + unsigned domain; ///< domain of symbol, complex (default) or real + unsigned ret_type; ///< value returned by return_type() + tinfo_t ret_type_tinfo; ///< value returned by return_type_tinfo() private: static unsigned next_serial; }; -// utility functions -inline const symbol &ex_to_symbol(const ex &e) +/** Specialization of symbol to real domain */ +class realsymbol : public symbol { - return static_cast(*e.bp); -} + // constructors +public: + realsymbol(); + explicit realsymbol(const std::string & initname, unsigned domain = domain::real); + realsymbol(const std::string & initname, const std::string & texname, unsigned domain = domain::real); + realsymbol(const std::string & initname, unsigned rt, tinfo_t rtt, unsigned domain = domain::real); + realsymbol(const std::string & initname, const std::string & texname, unsigned rt, tinfo_t rtt, unsigned domain = domain::real); +}; + + +/** Specialization of symbol to real domain */ +class possymbol : public symbol +{ + // constructors +public: + possymbol(); + explicit possymbol(const std::string & initname, unsigned domain = domain::positive); + possymbol(const std::string & initname, const std::string & texname, unsigned domain = domain::positive); + possymbol(const std::string & initname, unsigned rt, tinfo_t rtt, unsigned domain = domain::positive); + possymbol(const std::string & initname, const std::string & texname, unsigned rt, tinfo_t rtt, unsigned domain = domain::positive); +}; -// wrapper functions around member functions -inline void unassign(symbol & symarg) -{ symarg.unassign(); } +// utility functions -inline int degree(const symbol & a, const ex & s) -{ return a.degree(s); } +/** Specialization of is_exactly_a(obj) for realsymbol objects. */ +template<> inline bool is_exactly_a(const basic & obj) +{ + if (!is_a(obj)) + return false; + unsigned domain = static_cast(obj).get_domain(); + return domain==domain::real || domain==domain::positive; +} -inline int ldegree(const symbol & a, const ex & s) -{ return a.ldegree(s); } +/** Specialization of is_exactly_a(obj) for possymbol objects. */ +template<> inline bool is_exactly_a(const basic & obj) +{ + if (!is_a(obj)) + return false; + unsigned domain = static_cast(obj).get_domain(); + return domain == domain::positive; +} } // namespace GiNaC