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
31 // default constructor, destructor, copy constructor assignment operator and helpers
38 debugmsg("constant destructor",LOGLEVEL_DESTRUCT);
42 constant::constant(constant const & other)
44 debugmsg("constant copy constructor",LOGLEVEL_CONSTRUCT);
50 void constant::copy(constant const & other)
56 if (other.number != 0) {
57 number = new numeric(*other.number);
61 fct_assigned=other.fct_assigned;
64 void constant::destroy(bool call_parent)
68 basic::destroy(call_parent);
77 constant::constant(string const & initname, ex (*efun)()) :
78 basic(TINFO_constant), name(initname), ef(efun),
79 number(0), fct_assigned(true), serial(next_serial++)
81 debugmsg("constant constructor from string, function",LOGLEVEL_CONSTRUCT);
84 constant::constant(string const & initname, numeric const & initnumber) :
85 basic(TINFO_constant), name(initname), ef(0),
86 number(new numeric(initnumber)), fct_assigned(false), serial(next_serial++)
88 debugmsg("constant constructor from string, numeric",LOGLEVEL_CONSTRUCT);
92 // functions overriding virtual functions from bases classes
97 basic * constant::duplicate() const
99 debugmsg("constant duplicate",LOGLEVEL_DUPLICATE);
100 return new constant(*this);
103 ex constant::evalf(int level) const
107 } else if (number != 0) {
115 int constant::compare_same_type(basic const & other) const
117 ASSERT(is_exactly_of_type(other, constant));
118 // constant const & o=static_cast<constant &>(const_cast<basic &>(other));
119 // return name.compare(o.name);
120 const constant *o = static_cast<const constant *>(&other);
121 if (serial==o->serial) return 0;
122 return serial < o->serial ? -1 : 1;
125 bool constant::is_equal_same_type(basic const & other) const
127 ASSERT(is_exactly_of_type(other, constant));
128 const constant *o = static_cast<const constant *>(&other);
129 return serial==o->serial;
133 // new virtual functions which can be overridden by derived classes
139 // non-virtual functions in this class
145 // static member variables
148 unsigned constant::next_serial=0;
154 const constant some_constant("",0);
155 type_info const & typeid_constant=typeid(some_constant);
157 /** Pi. (3.14159...) Diverts straight into CLN for evalf(). */
158 const constant Pi("Pi", PiEvalf);
159 /** Catalan's constant. (0.91597...) Diverts straight into CLN for evalf(). */
160 const constant EulerGamma("EulerGamma", EulerGammaEvalf);
161 /** Euler's constant. (0.57721...) Sometimes called Euler-Mascheroni constant.
162 * Diverts straight into CLN for evalf(). */
163 const constant Catalan("Catalan", CatalanEvalf);