X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fcolor.h;h=2086909e1304dd1c7a35ac9e53c658263150348c;hp=9a89387cbadcce0bca0c838a8ed30f05c245b893;hb=bc6dacb50cc13691efc466d2cc1900048158ec8d;hpb=5a7178a44f067581d3acd8cff8c0801354d0c61f diff --git a/ginac/color.h b/ginac/color.h index 9a89387c..2086909e 100644 --- a/ginac/color.h +++ b/ginac/color.h @@ -3,7 +3,7 @@ * Interface to GiNaC's color (SU(3) Lie algebra) 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 @@ -33,7 +33,7 @@ namespace GiNaC { * of SU(3), as used for calculations in quantum chromodynamics. A * representation label (an unsigned 8-bit integer) is used to distinguish * elements from different Lie algebras (objects with different labels - * commute). These objects implement an abstract representation of the + * commutate). These objects implement an abstract representation of the * group, not a specific matrix representation. The indices used for color * objects should not have a variance. */ class color : public indexed @@ -47,19 +47,20 @@ public: // internal constructors color(unsigned char rl, const exvector & v, bool discardable = false); - color(unsigned char rl, exvector * vp); // vp will be deleted + color(unsigned char rl, std::auto_ptr vp); // functions overriding virtual functions from base classes protected: - ex simplify_ncmul(const exvector & v) const; - ex thisexprseq(const exvector & v) const; - ex thisexprseq(exvector * vp) const; - unsigned return_type(void) const { return return_types::noncommutative; } - unsigned return_type_tinfo(void) const { return TINFO_color + representation_label; } + ex eval_ncmul(const exvector & v) const; + bool match_same_type(const basic & other) const; + ex thiscontainer(const exvector & v) const; + ex thiscontainer(std::auto_ptr vp) const; + unsigned return_type() const { return return_types::noncommutative; } + unsigned return_type_tinfo() const { return TINFO_color + representation_label; } // non-virtual functions in this class public: - unsigned char get_representation_label(void) const {return representation_label;} + unsigned char get_representation_label() const {return representation_label;} // member variables private: @@ -72,9 +73,10 @@ class su3one : public tensor { GINAC_DECLARE_REGISTERED_CLASS(su3one, tensor) - // functions overriding virtual functions from bases classes -public: - void print(const print_context & c, unsigned level = 0) const; + // non-virtual functions in this class +protected: + void do_print(const print_context & c, unsigned level) const; + void do_print_latex(const print_latex & c, unsigned level) const; }; /** This class represents an su(3) generator. */ @@ -82,9 +84,14 @@ class su3t : public tensor { GINAC_DECLARE_REGISTERED_CLASS(su3t, tensor) - // functions overriding virtual functions from bases classes + // functions overriding virtual functions from base classes public: - void print(const print_context & c, unsigned level = 0) const; + bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; + + // non-virtual functions in this class +protected: + void do_print(const print_context & c, unsigned level) const; + void do_print_latex(const print_latex & c, unsigned level) const; }; /** This class represents the tensor of antisymmetric su(3) structure @@ -93,11 +100,15 @@ class su3f : public tensor { GINAC_DECLARE_REGISTERED_CLASS(su3f, tensor) - // functions overriding virtual functions from bases classes + // functions overriding virtual functions from base classes public: - void print(const print_context & c, unsigned level = 0) const; ex eval_indexed(const basic & i) const; bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; + + // non-virtual functions in this class +protected: + void do_print(const print_context & c, unsigned level) const; + void do_print_latex(const print_latex & c, unsigned level) const; }; /** This class represents the tensor of symmetric su(3) structure constants. */ @@ -105,21 +116,26 @@ class su3d : public tensor { GINAC_DECLARE_REGISTERED_CLASS(su3d, tensor) - // functions overriding virtual functions from bases classes + // functions overriding virtual functions from base classes public: - void print(const print_context & c, unsigned level = 0) const; ex eval_indexed(const basic & i) const; bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const; + + // non-virtual functions in this class +protected: + void do_print(const print_context & c, unsigned level) const; + void do_print_latex(const print_latex & c, unsigned level) const; }; // global functions -inline const color &ex_to_color(const ex &e) + +/** Specialization of is_exactly_a(obj) for color objects. */ +template<> inline bool is_exactly_a(const basic & obj) { - return static_cast(*e.bp); + return obj.tinfo()==TINFO_color; } - /** Create the su(3) unity element. This is an indexed object, although it * has no indices. * @@ -153,6 +169,13 @@ ex color_d(const ex & a, const ex & b, const ex & c); /** This returns the linear combination d.a.b.c+I*f.a.b.c. */ ex color_h(const ex & a, const ex & b, const ex & c); +/** Calculate the trace of an expression containing color objects with a + * specified representation label. + * + * @param e Expression to take the trace of + * @param rl Representation label */ +ex color_trace(const ex & e, unsigned char rl = 0); + } // namespace GiNaC