3 * Implementation of GiNaC's constant types and some special constants. */
6 * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
34 // default constructor, destructor, copy constructor assignment operator and helpers
41 debugmsg("constant destructor",LOGLEVEL_DESTRUCT);
45 constant::constant(constant const & other)
47 debugmsg("constant copy constructor",LOGLEVEL_CONSTRUCT);
53 void constant::copy(constant const & other)
59 if (other.number != 0) {
60 number = new numeric(*other.number);
64 fct_assigned=other.fct_assigned;
67 void constant::destroy(bool call_parent)
71 basic::destroy(call_parent);
80 constant::constant(string const & initname, ex (*efun)()) :
81 basic(TINFO_constant), name(initname), ef(efun),
82 number(0), fct_assigned(true), serial(next_serial++)
84 debugmsg("constant constructor from string, function",LOGLEVEL_CONSTRUCT);
87 constant::constant(string const & initname, numeric const & initnumber) :
88 basic(TINFO_constant), name(initname), ef(0),
89 number(new numeric(initnumber)), fct_assigned(false), serial(next_serial++)
91 debugmsg("constant constructor from string, numeric",LOGLEVEL_CONSTRUCT);
95 // functions overriding virtual functions from bases classes
100 basic * constant::duplicate() const
102 debugmsg("constant duplicate",LOGLEVEL_DUPLICATE);
103 return new constant(*this);
106 ex constant::evalf(int level) const
110 } else if (number != 0) {
118 int constant::compare_same_type(basic const & other) const
120 GINAC_ASSERT(is_exactly_of_type(other, constant));
121 // constant const & o=static_cast<constant &>(const_cast<basic &>(other));
122 // return name.compare(o.name);
123 const constant *o = static_cast<const constant *>(&other);
124 if (serial==o->serial) return 0;
125 return serial < o->serial ? -1 : 1;
128 bool constant::is_equal_same_type(basic const & other) const
130 GINAC_ASSERT(is_exactly_of_type(other, constant));
131 const constant *o = static_cast<const constant *>(&other);
132 return serial==o->serial;
136 // new virtual functions which can be overridden by derived classes
142 // non-virtual functions in this class
148 // static member variables
151 unsigned constant::next_serial=0;
157 const constant some_constant("",0);
158 type_info const & typeid_constant=typeid(some_constant);
160 /** Pi. (3.14159...) Diverts straight into CLN for evalf(). */
161 const constant Pi("Pi", PiEvalf);
162 /** Catalan's constant. (0.91597...) Diverts straight into CLN for evalf(). */
163 const constant EulerGamma("EulerGamma", EulerGammaEvalf);
164 /** Euler's constant. (0.57721...) Sometimes called Euler-Mascheroni constant.
165 * Diverts straight into CLN for evalf(). */
166 const constant Catalan("Catalan", CatalanEvalf);