X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=ginac%2Fsymbol.h;h=c174ad5f5136b10e83d8dc0dc1cf526b07b142d6;hb=1261c54df6548cf558405a118b2134805f63376d;hp=8ff63130d0f6532472b4af75760d9db2a934d051;hpb=68fdf425abf14d016d5f95ee7b9d06a19a3c5926;p=ginac.git diff --git a/ginac/symbol.h b/ginac/symbol.h index 8ff63130..c174ad5f 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) 1999-2008 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 @@ -17,7 +17,7 @@ * * 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__ @@ -31,46 +31,40 @@ 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 - }; + friend class realsymbol; + friend class possymbol; // member functions // other constructors 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, 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: - void print(const print_context & c, unsigned level = 0) const; 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 lst & ls, const lst & lr, unsigned options = 0) const { return subs_one_level(ls, lr, options); } // overwrites basic::subs() for performance reasons - ex normal(lst &sym_lst, lst &repl_lst, int level = 0) const; - ex to_rational(lst &repl_lst) const; - ex to_polynomial(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; bool is_equal_same_type(const basic & other) const; @@ -78,10 +72,14 @@ 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; } + 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(); std::string default_TeX_name() const; @@ -89,32 +87,62 @@ private: // 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 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 +/** 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, 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 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 symbol { - return obj.tinfo()==TINFO_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(); } -inline int degree(const symbol & a, const ex & s) -{ return a.degree(s); } +// utility functions + +/** Specialization of is_exactly_a(obj) for realsymbol objects. */ +template<> inline bool is_exactly_a(const basic & obj) +{ + if (obj.tinfo() != &symbol::tinfo_static) + 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 (obj.tinfo() != &symbol::tinfo_static) + return false; + unsigned domain = static_cast(obj).get_domain(); + return domain == domain::positive; +} } // namespace GiNaC