X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fsymbol.h;h=29e7ad402b16eceb20cedd39684d800201f72a64;hp=6ab13d12ae4a0be94b349de540b2fd30193e2d3f;hb=32209e57010f19f080cc25e527347bcaa36053ec;hpb=97af29c12bb3074cfb4e674d71000f0712c51ba2 diff --git a/ginac/symbol.h b/ginac/symbol.h index 6ab13d12..29e7ad40 100644 --- a/ginac/symbol.h +++ b/ginac/symbol.h @@ -3,7 +3,7 @@ * Interface to GiNaC's symbolic objects. */ /* - * GiNaC Copyright (C) 1999-2000 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 @@ -17,123 +17,123 @@ * * 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" -#ifndef NO_NAMESPACE_GINAC namespace GiNaC { -#endif // ndef NO_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. */ - 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; //!< Yet another refcounter. PLEASE EXPLAIN! - }; - -// member functions + GINAC_DECLARE_REGISTERED_CLASS(symbol, basic) - // default constructor, destructor, copy constructor assignment operator and helpers -public: - symbol(); - ~symbol(); - symbol(const symbol & other); -protected: - void copy(const symbol & other); - void destroy(bool call_parent); + friend class realsymbol; + friend class possymbol; - // other constructors +// member functions + + // other constructors public: - explicit symbol(const string & initname); - - // functions overriding virtual functions from base classes + explicit symbol(const std::string & initname, unsigned domain = domain::complex); + symbol(const std::string & initname, const std::string & texname, unsigned domain = domain::complex); + + // functions overriding virtual functions from base classes public: - basic * duplicate() const; - void print(ostream & os, unsigned upper_precedence=0) const; - void printraw(ostream & os) const; - void printtree(ostream & os, unsigned indent) const; - void printcsrc(ostream & os, unsigned type, unsigned upper_precedence=0) const; - bool info(unsigned inf) const; - ex expand(unsigned options=0) const; - bool has(const ex & other) const; - int degree(const symbol & s) const; - int ldegree(const symbol & s) const; - ex coeff(const symbol & s, int n = 1) const; - ex eval(int level = 0) const; - ex series(const symbol & s, const ex & point, int order) const; - ex normal(lst &sym_lst, lst &repl_lst, int level=0) const; - ex subs(const lst & ls, const lst & lr) const; + bool info(unsigned inf) 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; + 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; - - // non-virtual functions in this class + ex derivative(const symbol & s) const; + bool is_equal_same_type(const basic & other) const; + unsigned calchash() const; + + // non-virtual functions in this class public: - void assign(const ex & value); - void unassign(void); - void setname(const string & n) {name=n;} - string getname(void) const {return name;} + void set_name(const std::string & n) { name = n; } + 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: - string & autoname_prefix(void); + std::string & autoname_prefix(); + std::string default_TeX_name() const; // member variables protected: - assigned_ex_info * asexinfop; - unsigned serial; //!< unique serial number for comparision - string name; + 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 private: - static unsigned next_serial; + static unsigned next_serial; }; -// global constants -extern const symbol some_symbol; -extern const type_info & typeid_symbol; +/** 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); +}; -// utility functions -inline const symbol &ex_to_symbol(const ex &e) + +/** Specialization of symbol to real domain */ +class possymbol : public symbol { - return static_cast(*e.bp); -} + // 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); +}; + -// wrapper functions around member functions -inline void unassign(symbol & symarg) -{ return symarg.unassign(); } +// utility functions -inline int degree(const symbol & a, const symbol & 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 symbol & 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; +} -#ifndef NO_NAMESPACE_GINAC } // namespace GiNaC -#endif // ndef NO_NAMESPACE_GINAC #endif // ndef __GINAC_SYMBOL_H__