* Interface to GiNaC's color objects. */
/*
- * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2001 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
#include "indexed.h"
#include "ex.h"
-#ifndef NO_NAMESPACE_GINAC
namespace GiNaC {
-#endif // ndef NO_NAMESPACE_GINAC
const unsigned MAX_REPRESENTATION_LABELS = 4;
const unsigned COLOR_EIGHT = 8; // N*N-1
const unsigned COLOR_THREE = 3; // N
-// typedef std::vector<exvector> exvectorvector;
-typedef std::vector<exvector,malloc_alloc> exvectorvector; // CINT does not like vector<...,default_alloc>
-
-/** Base class for color object */
+// Cint doesn't like vector<..,default_alloc> but malloc_alloc is
+// unstandardized and not supported by newer GCCs.
+#if defined(__GNUC__) && ((__GNUC__ == 2) && (__GNUC_MINOR__ < 97))
+typedef std::vector<exvector,malloc_alloc> exvectorvector;
+#else
+typedef std::vector<exvector> exvectorvector;
+#endif
+
+
+/** This class holds an object carrying color indices (of class coloridx).
+ * It can represent the generators T_a and structure constants f_abc/d_abc
+ * of SU(3), the unity element ONE of the Lie algebra of SU(3), or the
+ * unity matrix delta8. Together, these objects are used to implement the
+ * Lie algebra su(3), as required for calculations in quantum
+ * chromodynamics. A representation label (an unsigned integer) is used to
+ * distinguish elements from different Lie algebras (only objects with the
+ * same representation label "interact" with each other). */
class color : public indexed
{
- GINAC_DECLARE_REGISTERED_CLASS(color, indexed)
+ GINAC_DECLARE_REGISTERED_CLASS(color, indexed)
// friends
- friend color color_ONE(unsigned rl);
- friend color color_T(const ex & a, unsigned rl);
- friend color color_f(const ex & a, const ex & b, const ex & c);
- friend color color_d(const ex & a, const ex & b, const ex & c);
- friend ex color_h(const ex & a, const ex & b, const ex & c);
- friend color color_delta8(const ex & a, const ex & b);
- friend unsigned subs_index_in_exvector(exvector & v, const ex & is, const ex & ir);
- friend void split_color_string_in_parts(const exvector & v, exvector & delta8vec,
- exvector & fvec, exvector & dvec,
- exvectorvector & Tvecs,
- exvectorvector & ONEvecs,
- exvector & unknownvec);
- friend exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
- exvector & dvec, exvectorvector & Tvecs,
- exvectorvector & ONEvecs, exvector & unknownvec);
- friend ex color_trace_of_one_representation_label(const exvector & v);
- friend ex color_trace(const exvector & v, unsigned rl);
- friend ex simplify_pure_color_string(const ex & e);
- friend ex simplify_color(const ex & e);
-
-
+ friend color color_ONE(unsigned rl);
+ friend color color_T(const ex & a, unsigned rl);
+ friend color color_f(const ex & a, const ex & b, const ex & c);
+ friend color color_d(const ex & a, const ex & b, const ex & c);
+ friend ex color_h(const ex & a, const ex & b, const ex & c);
+ friend color color_delta8(const ex & a, const ex & b);
+ friend unsigned subs_index_in_exvector(exvector & v, const ex & is, const ex & ir);
+ friend void split_color_string_in_parts(const exvector & v, exvector & delta8vec,
+ exvector & fvec, exvector & dvec,
+ exvectorvector & Tvecs,
+ exvectorvector & ONEvecs,
+ exvector & unknownvec);
+ friend exvector recombine_color_string(exvector & delta8vec, exvector & fvec,
+ exvector & dvec, exvectorvector & Tvecs,
+ exvectorvector & ONEvecs, exvector & unknownvec);
+ friend ex color_trace_of_one_representation_label(const exvector & v);
+ friend ex color_trace(const exvector & v, unsigned rl);
+ friend ex simplify_pure_color_string(const ex & e);
+ friend ex simplify_color(const ex & e);
+
// types
public:
- typedef enum { invalid, // not properly constructed by one of the friend functions
- color_T,
- color_f,
- color_d,
- color_delta8,
- color_ONE
- } color_types;
-
+ /** Type of object */
+ typedef enum {
+ invalid, /**< not properly constructed */
+ color_T, /**< one of the generators T_a of SU(3) (these are non-commutative) */
+ color_f, /**< one of the antisymmetric structure constants f_abc of SU(3) */
+ color_d, /**< one of the symmetric structure constants d_abc of SU(3) */
+ color_delta8, /**< the unity matrix */
+ color_ONE /**< the unity element of su(3) */
+ } color_types;
+
// member functions
- // default constructor, destructor, copy constructor assignment operator and helpers
-public:
- color();
- ~color();
- color(const color & other);
- const color & operator=(const color & other);
-protected:
- void copy(const color & other);
- void destroy(bool call_parent);
-
- // other constructors
+ // other constructors
protected:
- color(color_types const t, unsigned rl=0);
- color(color_types const t, const ex & i1, unsigned rl=0);
- color(color_types const t, const ex & i1, const ex & i2, unsigned rl=0);
- color(color_types const t, const ex & i1, const ex & i2, const ex & i3,
- unsigned rl=0);
- color(color_types const t, const exvector & iv, unsigned rl=0);
- color(color_types const t, exvector * ivp, unsigned rl=0);
-
- // functions overriding virtual functions from base classes
+ color(color_types const t, unsigned rl=0);
+ color(color_types const t, const ex & i1, unsigned rl=0);
+ color(color_types const t, const ex & i1, const ex & i2, unsigned rl=0);
+ color(color_types const t, const ex & i1, const ex & i2, const ex & i3,
+ unsigned rl=0);
+ color(color_types const t, const exvector & iv, unsigned rl=0);
+ color(color_types const t, exvector * ivp, unsigned rl=0);
+
+ // functions overriding virtual functions from base classes
public:
- basic * duplicate() const;
- void printraw(std::ostream & os) const;
- void printtree(std::ostream & os, unsigned indent) const;
- void print(std::ostream & os, unsigned upper_precedence=0) const;
- void printcsrc(std::ostream & os, unsigned type, unsigned upper_precedence=0) const;
- bool info(unsigned inf) const;
- ex eval(int level=0) const;
+ void printraw(std::ostream & os) const;
+ void printtree(std::ostream & os, unsigned indent) const;
+ void print(std::ostream & os, unsigned upper_precedence=0) const;
+ bool info(unsigned inf) const;
+ ex eval(int level=0) const;
protected:
- int compare_same_type(const basic & other) const;
- bool is_equal_same_type(const basic & other) const;
- ex simplify_ncmul(const exvector & v) const;
- ex thisexprseq(const exvector & v) const;
- ex thisexprseq(exvector * vp) const;
-
- // new virtual functions which can be overridden by derived classes
- // none
-
- // non-virtual functions in this class
+ bool is_equal_same_type(const basic & other) const;
+ ex simplify_ncmul(const exvector & v) const;
+ ex thisexprseq(const exvector & v) const;
+ ex thisexprseq(exvector * vp) const;
+
+ // new virtual functions which can be overridden by derived classes
+ // none
+
+ // non-virtual functions in this class
protected:
- bool all_of_type_coloridx(void) const;
-
+ bool all_of_type_coloridx(void) const;
+
// member variables
protected:
- color_types type;
- unsigned representation_label; // to distiguish independent color matrices coming from separated fermion lines
+ color_types type; /**< Type of object (generator, structure constant etc.) */
+ unsigned representation_label; /**< Representation label to distiguish independent color matrices coming from separated fermion lines */
};
-// global constants
-
-extern const color some_color;
-extern const type_info & typeid_color;
-
// global functions
inline const color &ex_to_color(const ex &e)
{
ex brute_force_sum_color_indices(const ex & e);
-void append_exvector_to_exvector(exvector & dest, const exvector & source);
-
-#ifndef NO_NAMESPACE_GINAC
} // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC
#endif // ndef __GINAC_COLOR_H__
git://www.ginac.de / ginac.git / blobdiff