X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fsymbol.h;h=51164a972de73971d7f51b99d08f5a6800bbb626;hp=69d9b9eefdc41a9425b155c091b3420ea919d462;hb=eddd1f843746065177daf1965a1ccd1a3d82a3fe;hpb=591b85b0697370f2f5f25a29a1e94ff831a02c12 diff --git a/ginac/symbol.h b/ginac/symbol.h index 69d9b9ee..51164a97 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) 1999-2004 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 @@ -26,6 +26,7 @@ #include #include "basic.h" #include "ex.h" +#include "ptr.h" namespace GiNaC { @@ -37,108 +38,109 @@ namespace GiNaC { * first place. */ class symbol : public basic { - GINAC_DECLARE_REGISTERED_CLASS_NO_CTORS(symbol, basic) - + GINAC_DECLARE_REGISTERED_CLASS(symbol, basic) + + friend class realsymbol; + // types - /** Symbols as keys to expressions - this is deprecated. */ - class assigned_ex_info { + /** Symbols as keys to expressions - only for ginsh. */ + class assigned_ex_info : public refcounted { 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 + assigned_ex_info() throw(); ///< Default ctor + bool is_assigned; ///< True if there is an expression assigned + ex assigned_expression; ///< The actual expression }; - + // 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, const std::string & texname); + 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, unsigned rt, unsigned rtt, unsigned domain = domain::complex); + symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned 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 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; } + unsigned return_type_tinfo() const { return ret_type_tinfo; } + ex conjugate() 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 unassign(); 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 default_TeX_name(void) const; + 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 - std::string TeX_name; ///< LaTeX name of this symbol + 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 domain; ///< domain of symbol, complex (default) or real + unsigned ret_type; ///< value returned by return_type() + unsigned ret_type_tinfo; ///< value returned by return_type_tinfo() private: static unsigned next_serial; }; +/** Specialization of symbol to real domain */ +class realsymbol : public symbol +{ + // 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, unsigned rtt, unsigned domain = domain::real); + realsymbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt, unsigned domain = domain::real); +}; + + // utility functions -/** Return the symbol object handled by an ex. Deprecated: use ex_to(). - * This is unsafe: you need to check the type first. */ -inline const symbol &ex_to_symbol(const ex &e) +/** Specialization of is_exactly_a(obj) for symbol objects. */ +template<> inline bool is_exactly_a(const basic & obj) { - return static_cast(*e.bp); + return obj.tinfo() == TINFO_symbol; } -/** Specialization of is_exactly_a(obj) for symbol objects. */ -template<> inline bool is_exactly_a(const basic & obj) +/** Specialization of is_exactly_a(obj) for realsymbol objects. */ +template<> inline bool is_exactly_a(const basic & obj) { - return obj.tinfo()==TINFO_symbol; + return (obj.tinfo() == TINFO_symbol) && (static_cast(obj).get_domain() == domain::real); } // wrapper functions around member functions inline void unassign(symbol & symarg) { symarg.unassign(); } -inline int degree(const symbol & a, const ex & s) -{ return a.degree(s); } - -inline int ldegree(const symbol & a, const ex & s) -{ return a.ldegree(s); } - } // namespace GiNaC #endif // ndef __GINAC_SYMBOL_H__