* Implementation of GiNaC's constant types and some special constants. */
/*
- * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2003 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 <string>
#include <stdexcept>
+#include <iostream>
#include "constant.h"
#include "numeric.h"
#include "ex.h"
#include "archive.h"
-#include "debugmsg.h"
+#include "utils.h"
-#ifndef NO_GINAC_NAMESPACE
namespace GiNaC {
-#endif // ndef NO_GINAC_NAMESPACE
-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 constructor, destructor, copy constructor assignment operator and helpers
+// default constructor
//////////
// public
-constant::constant() :
- basic(TINFO_constant), name(""), ef(0),
- number(0), serial(next_serial++)
+constant::constant() : basic(TINFO_constant), ef(0), serial(next_serial++)
{
- debugmsg("constant default constructor",LOGLEVEL_CONSTRUCT);
-}
-
-constant::~constant()
-{
- debugmsg("constant destructor",LOGLEVEL_DESTRUCT);
- destroy(0);
-}
-
-constant::constant(const constant & other)
-{
- debugmsg("constant copy constructor",LOGLEVEL_CONSTRUCT);
- copy(other);
-}
-
-// protected
-
-void constant::copy(const constant & other)
-{
- basic::copy(other);
- name=other.name;
- serial=other.serial;
- ef=other.ef;
- if (other.number != 0) {
- number = new numeric(*other.number);
- } else {
- number = 0;
- }
- // fct_assigned=other.fct_assigned;
-}
-
-void constant::destroy(bool call_parent)
-{
- delete number;
- if (call_parent)
- basic::destroy(call_parent);
+ setflag(status_flags::evaluated | status_flags::expanded);
}
//////////
// public
-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++)
+constant::constant(const std::string & initname, evalffunctype efun, const std::string & texname)
+ : basic(TINFO_constant), name(initname), ef(efun), serial(next_serial++)
{
- debugmsg("constant constructor from string, function",LOGLEVEL_CONSTRUCT);
+ if (texname.empty())
+ TeX_name = "\\mbox{" + name + "}";
+ else
+ TeX_name = texname;
+ setflag(status_flags::evaluated | status_flags::expanded);
}
-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++)
+constant::constant(const std::string & initname, const numeric & initnumber, const std::string & texname)
+ : basic(TINFO_constant), name(initname), ef(0), number(initnumber), serial(next_serial++)
{
- debugmsg("constant constructor from string, numeric",LOGLEVEL_CONSTRUCT);
+ if (texname.empty())
+ TeX_name = "\\mbox{" + name + "}";
+ else
+ TeX_name = texname;
+ setflag(status_flags::evaluated | status_flags::expanded);
}
//////////
// 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);
-}
+constant::constant(const archive_node &n, lst &sym_lst) : inherited(n, sym_lst) {}
-/** Unarchive the object. */
-ex constant::unarchive(const archive_node &n, const lst &sym_lst)
+ex constant::unarchive(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)
- string s;
- if (n.find_string("name", s)) {
- if (s == Pi.name)
- return Pi;
- else if (s == Catalan.name)
- return Catalan;
- else if (s == EulerGamma.name)
- return EulerGamma;
- else
- throw (std::runtime_error("unknown constant '" + s + "' in archive"));
- } else
- throw (std::runtime_error("unnamed constant in archive"));
+ // 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;
+ else if (s == Catalan.name)
+ return Catalan;
+ else if (s == Euler.name)
+ return Euler;
+ 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);
+ inherited::archive(n);
+ n.add_string("name", name);
}
//////////
-// functions overriding virtual functions from bases classes
+// functions overriding virtual functions from base classes
//////////
// public
-basic * constant::duplicate() const
+void constant::do_print(const print_context & c, unsigned level) const
{
- debugmsg("constant duplicate",LOGLEVEL_DUPLICATE);
- return new constant(*this);
+ c.s << name;
}
-void constant::print(ostream & os, unsigned upper_precedence) const
+void constant::do_print_tree(const print_tree & c, unsigned level) const
{
- debugmsg("constant print",LOGLEVEL_PRINT);
- os << name;
+ c.s << std::string(level, ' ') << name << " (" << class_name() << ")" << " @" << this
+ << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
+ << std::endl;
}
-void constant::printraw(ostream & os) const
+void constant::do_print_latex(const print_latex & c, unsigned level) const
{
- debugmsg("constant printraw",LOGLEVEL_PRINT);
- os << "constant(" << name << ")";
+ c.s << TeX_name;
}
-void constant::printtree(ostream & os, unsigned indent) const
+void constant::do_print_python_repr(const print_python_repr & c, unsigned level) 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;
+ c.s << class_name() << "('" << name << "'";
+ if (TeX_name != "\\mbox{" + name + "}")
+ c.s << ",TeX_name='" << TeX_name << "'";
+ c.s << ')';
}
ex constant::evalf(int level) const
{
- if (ef!=0) {
- return ef();
- } else if (number != 0) {
- return *number;
- }
- return *this;
+ if (ef!=0) {
+ return ef();
+ } else {
+ return number.evalf();
+ }
+ return *this;
}
// protected
+/** Implementation of ex::diff() for a constant 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));
- // 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;
+ GINAC_ASSERT(is_exactly_a<constant>(other));
+ const constant &o = static_cast<const constant &>(other);
+
+ if (serial == o.serial)
+ return 0;
+ else
+ return serial < o.serial ? -1 : 1;
}
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);
- return serial==o->serial;
+ GINAC_ASSERT(is_exactly_a<constant>(other));
+ const constant &o = static_cast<const constant &>(other);
+
+ return serial == o.serial;
+}
+
+unsigned constant::calchash() const
+{
+ hashvalue = golden_ratio_hash(tinfo() ^ serial);
+
+ setflag(status_flags::hash_calculated);
+
+ return hashvalue;
}
//////////
// static member variables
//////////
-unsigned constant::next_serial=0;
+unsigned constant::next_serial = 0;
//////////
// global constants
//////////
-const constant 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 Pi("Pi", PiEvalf, "\\pi");
+
/** Euler's constant. (0.57721...) Sometimes called Euler-Mascheroni constant.
* Diverts straight into CLN for evalf(). */
-const constant Catalan("Catalan", CatalanEvalf);
+const constant Euler("Euler", EulerEvalf, "\\gamma_E");
+
+/** Catalan's constant. (0.91597...) Diverts straight into CLN for evalf(). */
+const constant Catalan("Catalan", CatalanEvalf, "G");
-#ifndef NO_GINAC_NAMESPACE
} // namespace GiNaC
-#endif // ndef NO_GINAC_NAMESPACE
git://www.ginac.de / ginac.git / blobdiff