* Implementation of GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2008 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
#include "ex.h"
#include "archive.h"
#include "utils.h"
+#include "inifcns.h"
namespace GiNaC {
// public
-constant::constant() : basic(&constant::tinfo_static), ef(0), serial(next_serial++)
+constant::constant() : ef(0), 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)
- : basic(&constant::tinfo_static), name(initname), ef(efun), 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 + "}";
setflag(status_flags::evaluated | status_flags::expanded);
}
-constant::constant(const std::string & initname, const numeric & initnumber, const std::string & texname)
- : basic(&constant::tinfo_static), name(initname), ef(0), number(initnumber), serial(next_serial++)
+constant::constant(const std::string & initname, const numeric & initnumber, const std::string & texname, unsigned dm)
+ : name(initname), ef(0), number(initnumber), serial(next_serial++), domain(dm)
{
if (texname.empty())
TeX_name = "\\mbox{" + 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 inherited::info(inf);
+}
+
ex constant::evalf(int level) const
{
if (ef!=0) {
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.
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((p_int)typeid_this ^ serial);
setflag(status_flags::hash_calculated);
//////////
/** 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