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/** @file ncmul.h
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*
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* Interface to GiNaC's non-commutative products of expressions. */
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/*
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* GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __GINAC_NCMUL_H__
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#define __GINAC_NCMUL_H__
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#include "exprseq.h"
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namespace GiNaC {
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/** Non-commutative product of expressions. */
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class ncmul : public exprseq
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{
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GINAC_DECLARE_REGISTERED_CLASS(ncmul, exprseq)
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friend class power;
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friend ex nonsimplified_ncmul(const exvector & v);
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friend ex simplified_ncmul(const exvector & v);
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// member functions
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// other constructors
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public:
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ncmul(const ex & lh, const ex & rh);
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ncmul(const ex & f1, const ex & f2, const ex & f3);
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ncmul(const ex & f1, const ex & f2, const ex & f3,
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const ex & f4);
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ncmul(const ex & f1, const ex & f2, const ex & f3,
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const ex & f4, const ex & f5);
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ncmul(const ex & f1, const ex & f2, const ex & f3,
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const ex & f4, const ex & f5, const ex & f6);
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ncmul(const exvector & v, bool discardable=false);
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ncmul(exvector * vp); // vp will be deleted
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// functions overriding virtual functions from base classes
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public:
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void print(const print_context & c, unsigned level = 0) const;
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unsigned precedence(void) const {return 50;}
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bool info(unsigned inf) const;
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int degree(const ex & s) const;
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int ldegree(const ex & s) const;
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ex expand(unsigned options=0) const;
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ex coeff(const ex & s, int n=1) const;
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ex eval(int level=0) const;
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ex evalm(void) const;
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exvector get_free_indices(void) const;
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ex thisexprseq(const exvector & v) const;
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ex thisexprseq(exvector * vp) const;
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protected:
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ex derivative(const symbol & s) const;
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unsigned return_type(void) const;
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unsigned return_type_tinfo(void) const;
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// new virtual functions which can be overridden by derived classes
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// none
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// non-virtual functions in this class
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protected:
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unsigned count_factors(const ex & e) const;
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void append_factors(exvector & v, const ex & e) const;
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exvector expandchildren(unsigned options) const;
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public:
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const exvector & get_factors(void) const;
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};
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// friend funtions
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ex nonsimplified_ncmul(const exvector & v);
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ex simplified_ncmul(const exvector & v);
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// utility functions
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/** Specialization of is_exactly_a<ncmul>(obj) for ncmul objects. */
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template<> inline bool is_exactly_a<ncmul>(const basic & obj)
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{
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return obj.tinfo()==TINFO_ncmul;
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}
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} // namespace GiNaC
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#endif // ndef __GINAC_NCMUL_H__
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