* Implementation of GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2016 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
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <string>
-#include <stdexcept>
-#include <iostream>
-
#include "constant.h"
#include "numeric.h"
#include "ex.h"
-#include "print.h"
#include "archive.h"
#include "utils.h"
+#include "inifcns.h"
+
+#include <iostream>
+#include <stdexcept>
+#include <string>
namespace GiNaC {
-GINAC_IMPLEMENT_REGISTERED_CLASS(constant, basic)
+GINAC_IMPLEMENT_REGISTERED_CLASS_OPT(constant, basic,
+ print_func<print_context>(&constant::do_print).
+ print_func<print_latex>(&constant::do_print_latex).
+ print_func<print_tree>(&constant::do_print_tree).
+ print_func<print_python_repr>(&constant::do_print_python_repr))
//////////
-// default ctor, dtor, copy ctor, assignment operator and helpers
+// default constructor
//////////
// public
-constant::constant() : basic(TINFO_constant), ef(0), number(0), serial(next_serial++) {}
-
-// protected
-
-/** For use by copy ctor and assignment operator. */
-void constant::copy(const constant & other)
+constant::constant() : ef(nullptr), serial(next_serial++), domain(domain::complex)
{
- inherited::copy(other);
- name = other.name;
- TeX_name = other.TeX_name;
- serial = other.serial;
- ef = other.ef;
- if (other.number != 0)
- number = new numeric(*other.number);
- else
- number = 0;
-}
-
-void constant::destroy(bool call_parent)
-{
- delete number;
- if (call_parent)
- inherited::destroy(call_parent);
+ setflag(status_flags::evaluated | status_flags::expanded);
}
//////////
-// other ctors
+// other constructors
//////////
// public
-constant::constant(const std::string & initname, evalffunctype efun, const std::string & texname)
- : basic(TINFO_constant), name(initname), ef(efun), number(0), serial(next_serial++)
+constant::constant(const std::string & initname, evalffunctype efun, const std::string & texname, unsigned dm)
+ : name(initname), ef(efun), serial(next_serial++), domain(dm)
{
if (texname.empty())
- TeX_name = "\\mbox{" + name + "}";
+ TeX_name = "\\mathrm{" + name + "}";
else
TeX_name = texname;
setflag(status_flags::evaluated | status_flags::expanded);
}
-constant::constant(const std::string & initname, const numeric & initnumber, const std::string & texname)
- : basic(TINFO_constant), name(initname), ef(0), number(new numeric(initnumber)), serial(next_serial++)
+constant::constant(const std::string & initname, const numeric & initnumber, const std::string & texname, unsigned dm)
+ : name(initname), ef(nullptr), number(initnumber), serial(next_serial++), domain(dm)
{
if (texname.empty())
- TeX_name = "\\mbox{" + name + "}";
+ TeX_name = "\\mathrm{" + name + "}";
else
TeX_name = texname;
setflag(status_flags::evaluated | status_flags::expanded);
// archiving
//////////
-constant::constant(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst) {}
-
-ex constant::unarchive(const archive_node &n, const lst &sym_lst)
+void constant::read_archive(const archive_node &n, lst &sym_lst)
{
// Find constant by name (!! this is bad: 'twould be better if there
// was a list of all global constants that we could search)
std::string s;
if (n.find_string("name", s)) {
if (s == Pi.name)
- return Pi;
+ *this = Pi;
else if (s == Catalan.name)
- return Catalan;
+ *this = Catalan;
else if (s == Euler.name)
- return Euler;
+ *this = Euler;
else
throw (std::runtime_error("unknown constant '" + s + "' in archive"));
} else
throw (std::runtime_error("unnamed constant in archive"));
}
+GINAC_BIND_UNARCHIVER(constant);
void constant::archive(archive_node &n) const
{
// public
-void constant::print(const print_context & c, unsigned level) const
+void constant::do_print(const print_context & c, unsigned level) const
{
- if (is_a<print_tree>(c)) {
- c.s << std::string(level, ' ') << name << " (" << class_name() << ")"
- << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
- << std::endl;
- } else if (is_a<print_latex>(c))
- c.s << TeX_name;
- else
- c.s << name;
+ c.s << name;
}
-int constant::degree(const ex & s) const
+void constant::do_print_tree(const print_tree & c, unsigned level) const
{
- return is_equal(ex_to<basic>(s)) ? 1 : 0;
+ c.s << std::string(level, ' ') << name << " (" << class_name() << ")" << " @" << this
+ << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
+ << std::endl;
}
-int constant::ldegree(const ex & s) const
+void constant::do_print_latex(const print_latex & c, unsigned level) const
{
- return is_equal(ex_to<basic>(s)) ? 1 : 0;
+ c.s << TeX_name;
}
-ex constant::coeff(const ex & s, int n) const
+void constant::do_print_python_repr(const print_python_repr & c, unsigned level) const
{
- if (is_equal(ex_to<basic>(s)))
- return n==1 ? _ex1 : _ex0;
+ c.s << class_name() << "('" << name << "'";
+ if (TeX_name != "\\mathrm{" + name + "}")
+ c.s << ",TeX_name='" << TeX_name << "'";
+ c.s << ')';
+}
+
+bool constant::info(unsigned inf) const
+{
+ if (inf == info_flags::polynomial)
+ return true;
+ if (inf == info_flags::real)
+ return domain==domain::real || domain==domain::positive ;
+ if (inf==info_flags::positive || inf==info_flags::nonnegative)
+ return domain == domain::positive;
else
- return n==0 ? *this : _ex0;
+ return inherited::info(inf);
}
-ex constant::evalf(int level) const
+ex constant::evalf() const
{
- if (ef!=0) {
+ if (ef!=nullptr) {
return ef();
- } else if (number != 0) {
- return number->evalf();
+ } else {
+ return number.evalf();
}
return *this;
}
+bool constant::is_polynomial(const ex & var) const
+{
+ return true;
+}
+
+ex constant::conjugate() const
+{
+ if ( domain==domain::real || domain==domain::positive )
+ return *this;
+ return conjugate_function(*this).hold();
+}
+
+ex constant::real_part() const
+{
+ if ( domain==domain::real || domain==domain::positive )
+ return *this;
+ return real_part_function(*this).hold();
+}
+
+ex constant::imag_part() const
+{
+ if ( domain==domain::real || domain==domain::positive )
+ return 0;
+ return imag_part_function(*this).hold();
+}
+
// protected
/** Implementation of ex::diff() for a constant always returns 0.
return serial == o.serial;
}
-unsigned constant::calchash(void) const
+unsigned constant::calchash() const
{
- hashvalue = golden_ratio_hash(tinfo() ^ serial);
- // mask out numeric hashes:
- hashvalue &= 0x7FFFFFFFU;
-
+ const void* typeid_this = (const void*)typeid(*this).name();
+ hashvalue = golden_ratio_hash((uintptr_t)typeid_this ^ serial);
+
setflag(status_flags::hash_calculated);
-
+
return hashvalue;
}
//////////
/** Pi. (3.14159...) Diverts straight into CLN for evalf(). */
-const constant Pi("Pi", PiEvalf, "\\pi");
+const constant Pi("Pi", PiEvalf, "\\pi", domain::positive);
/** Euler's constant. (0.57721...) Sometimes called Euler-Mascheroni constant.
* Diverts straight into CLN for evalf(). */
-const constant Euler("Euler", EulerEvalf, "\\gamma_E");
+const constant Euler("Euler", EulerEvalf, "\\gamma_E", domain::positive);
/** Catalan's constant. (0.91597...) Diverts straight into CLN for evalf(). */
-const constant Catalan("Catalan", CatalanEvalf, "G");
+const constant Catalan("Catalan", CatalanEvalf, "G", domain::positive);
} // namespace GiNaC
git://www.ginac.de / ginac.git / blobdiff