* Implementation of GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2000 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 "constant.h"
#include "numeric.h"
#include "ex.h"
+#include "archive.h"
#include "debugmsg.h"
-#ifndef NO_GINAC_NAMESPACE
+#ifndef NO_NAMESPACE_GINAC
namespace GiNaC {
-#endif // ndef NO_GINAC_NAMESPACE
+#endif // ndef NO_NAMESPACE_GINAC
+
+GINAC_IMPLEMENT_REGISTERED_CLASS(constant, basic)
//////////
// default constructor, destructor, copy constructor assignment operator and helpers
destroy(0);
}
-constant::constant(constant const & other)
+constant::constant(const constant & other)
{
debugmsg("constant copy constructor",LOGLEVEL_CONSTRUCT);
copy(other);
// protected
-void constant::copy(constant const & other)
+void constant::copy(const constant & other)
{
basic::copy(other);
name=other.name;
// public
-constant::constant(string const & initname, ex (*efun)()) :
+constant::constant(const string & initname, evalffunctype efun) :
basic(TINFO_constant), name(initname), ef(efun),
// number(0), fct_assigned(true), serial(next_serial++)
number(0), serial(next_serial++)
debugmsg("constant constructor from string, function",LOGLEVEL_CONSTRUCT);
}
-constant::constant(string const & initname, numeric const & initnumber) :
+constant::constant(const string & initname, const numeric & initnumber) :
basic(TINFO_constant), name(initname), ef(0),
number(new numeric(initnumber)), /* fct_assigned(false),*/ serial(next_serial++)
{
debugmsg("constant constructor from string, numeric",LOGLEVEL_CONSTRUCT);
}
+//////////
+// archiving
+//////////
+
+/** Construct object from archive_node. */
+constant::constant(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
+{
+ debugmsg("constant constructor from archive_node", LOGLEVEL_CONSTRUCT);
+}
+
+/** Unarchive the object. */
+ex constant::unarchive(const archive_node &n, const 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)
+ string s;
+ if (n.find_string("name", s)) {
+ if (s == Pi.name)
+ return Pi;
+ else if (s == Catalan.name)
+ return Catalan;
+ else if (s == gamma.name)
+ return gamma;
+ else
+ throw (std::runtime_error("unknown constant '" + s + "' in archive"));
+ } else
+ throw (std::runtime_error("unnamed constant in archive"));
+}
+
+/** Archive the object. */
+void constant::archive(archive_node &n) const
+{
+ inherited::archive(n);
+ n.add_string("name", name);
+}
+
//////////
// functions overriding virtual functions from bases classes
//////////
return new constant(*this);
}
+void constant::print(ostream & os, unsigned upper_precedence) const
+{
+ debugmsg("constant print",LOGLEVEL_PRINT);
+ os << name;
+}
+
+void constant::printraw(ostream & os) const
+{
+ debugmsg("constant printraw",LOGLEVEL_PRINT);
+ os << "constant(" << name << ")";
+}
+
+void constant::printtree(ostream & os, unsigned indent) const
+{
+ debugmsg("constant printtree",LOGLEVEL_PRINT);
+ os << string(indent,' ') << name
+ << ", type=" << typeid(*this).name()
+ << ", hash=" << hashvalue << " (0x" << hex << hashvalue << dec << ")"
+ << ", flags=" << flags << endl;
+}
+
+void constant::printcsrc(ostream & os, unsigned type, unsigned upper_precedence) const
+{
+ debugmsg("constant print csrc",LOGLEVEL_PRINT);
+ os << name;
+}
+
ex constant::evalf(int level) const
{
if (ef!=0) {
// protected
-int constant::compare_same_type(basic const & other) const
+/** Implementation of ex::diff() for a constant. It always returns 0.
+ *
+ * @see ex::diff */
+ex constant::derivative(const symbol & s) const
+{
+ return _ex0();
+}
+
+int constant::compare_same_type(const basic & other) const
{
GINAC_ASSERT(is_exactly_of_type(other, constant));
- // constant const & o=static_cast<constant &>(const_cast<basic &>(other));
+ // const constant & o=static_cast<constant &>(const_cast<basic &>(other));
// return name.compare(o.name);
const constant *o = static_cast<const constant *>(&other);
if (serial==o->serial) return 0;
return serial < o->serial ? -1 : 1;
}
-bool constant::is_equal_same_type(basic const & other) const
+bool constant::is_equal_same_type(const basic & other) const
{
GINAC_ASSERT(is_exactly_of_type(other, constant));
const constant *o = static_cast<const constant *>(&other);
//////////
const constant some_constant;
-type_info const & typeid_constant=typeid(some_constant);
+const type_info & typeid_constant=typeid(some_constant);
/** Pi. (3.14159...) Diverts straight into CLN for evalf(). */
const constant Pi("Pi", PiEvalf);
/** Catalan's constant. (0.91597...) Diverts straight into CLN for evalf(). */
-const constant EulerGamma("EulerGamma", EulerGammaEvalf);
+const constant gamma("gamma", gammaEvalf);
/** Euler's constant. (0.57721...) Sometimes called Euler-Mascheroni constant.
* Diverts straight into CLN for evalf(). */
const constant Catalan("Catalan", CatalanEvalf);
-#ifndef NO_GINAC_NAMESPACE
+#ifndef NO_NAMESPACE_GINAC
} // namespace GiNaC
-#endif // ndef NO_GINAC_NAMESPACE
+#endif // ndef NO_NAMESPACE_GINAC
git://www.ginac.de / ginac.git / blobdiff