* Implementation of GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2020 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
* 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 "archive.h"
#include "utils.h"
+#include "inifcns.h"
+
+#include <iostream>
+#include <stdexcept>
+#include <string>
namespace GiNaC {
// public
-constant::constant() : basic(&constant::tinfo_static), ef(0), serial(next_serial++), domain(domain::complex)
+constant::constant() : ef(nullptr), serial(next_serial++), domain(domain::complex)
{
setflag(status_flags::evaluated | status_flags::expanded);
}
// public
constant::constant(const std::string & initname, evalffunctype efun, const std::string & texname, unsigned dm)
- : basic(&constant::tinfo_static), name(initname), ef(efun), serial(next_serial++), domain(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, unsigned dm)
- : basic(&constant::tinfo_static), name(initname), ef(0), number(initnumber), serial(next_serial++), domain(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, lst &sym_lst) : inherited(n, sym_lst) {}
-
-ex constant::unarchive(const archive_node &n, 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
{
void constant::do_print_python_repr(const print_python_repr & c, unsigned level) const
{
c.s << class_name() << "('" << name << "'";
- if (TeX_name != "\\mbox{" + name + "}")
+ if (TeX_name != "\\mathrm{" + name + "}")
c.s << ",TeX_name='" << TeX_name << "'";
c.s << ')';
}
if (inf == info_flags::polynomial)
return true;
if (inf == info_flags::real)
- return domain == domain::real;
+ return domain==domain::real || domain==domain::positive ;
+ if (inf==info_flags::positive || inf==info_flags::nonnegative)
+ return domain == domain::positive;
else
return inherited::info(inf);
}
-ex constant::evalf(int level) const
+ex constant::evalf() const
{
- if (ef!=0) {
+ if (ef!=nullptr) {
return ef();
} else {
return number.evalf();
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.
unsigned constant::calchash() const
{
- hashvalue = golden_ratio_hash((p_int)tinfo() ^ serial);
+ const void* typeid_this = (const void*)typeid(*this).name();
+ hashvalue = golden_ratio_hash((uintptr_t)typeid_this ^ serial);
setflag(status_flags::hash_calculated);
//////////
/** Pi. (3.14159...) Diverts straight into CLN for evalf(). */
-const constant Pi("Pi", PiEvalf, "\\pi", domain::real);
+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", domain::real);
+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", domain::real);
+const constant Catalan("Catalan", CatalanEvalf, "G", domain::positive);
} // namespace GiNaC