* Implementation of GiNaC's symbolic objects. */
/*
- * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2004 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 "symbol.h"
#include "lst.h"
-#include "print.h"
#include "archive.h"
#include "tostring.h"
#include "utils.h"
+#include "inifcns.h"
namespace GiNaC {
-GINAC_IMPLEMENT_REGISTERED_CLASS_NO_CTORS(symbol, basic)
+GINAC_IMPLEMENT_REGISTERED_CLASS_OPT(symbol, basic,
+ print_func<print_context>(&symbol::do_print).
+ print_func<print_latex>(&symbol::do_print_latex).
+ print_func<print_tree>(&symbol::do_print_tree).
+ print_func<print_python_repr>(&symbol::do_print_python_repr))
//////////
-// default ctor, dtor, copy ctor, assignment operator and helpers
+// default constructor
//////////
-symbol::symbol() : inherited(TINFO_symbol), serial(next_serial++)
+// symbol
+
+symbol::symbol()
+ : inherited(TINFO_symbol), asexinfop(new assigned_ex_info), serial(next_serial++), name(autoname_prefix() + ToString(serial)), TeX_name(name), ret_type(return_types::commutative), ret_type_tinfo(TINFO_symbol), domain(domain::complex)
{
- name = TeX_name = autoname_prefix()+ToString(serial);
- asexinfop = new assigned_ex_info;
setflag(status_flags::evaluated | status_flags::expanded);
}
-/** For use by copy ctor and assignment operator. */
-void symbol::copy(const symbol & other)
-{
- inherited::copy(other);
- name = other.name;
- TeX_name = other.TeX_name;
- serial = other.serial;
- asexinfop = other.asexinfop;
- ++asexinfop->refcount;
-}
+// realsymbol
-void symbol::destroy(bool call_parent)
+realsymbol::realsymbol()
{
- if (--asexinfop->refcount == 0)
- delete asexinfop;
- if (call_parent)
- inherited::destroy(call_parent);
+ domain = domain::real;
}
//////////
-// other ctors
+// other constructors
//////////
// public
-symbol::symbol(const symbol & other)
+// symbol
+
+symbol::symbol(const std::string & initname, unsigned domain)
+ : inherited(TINFO_symbol), asexinfop(new assigned_ex_info), serial(next_serial++), name(initname), TeX_name(default_TeX_name()), ret_type(return_types::commutative), ret_type_tinfo(TINFO_symbol), domain(domain)
{
- copy(other);
+ setflag(status_flags::evaluated | status_flags::expanded);
+}
+
+symbol::symbol(const std::string & initname, const std::string & texname, unsigned domain)
+ : inherited(TINFO_symbol), asexinfop(new assigned_ex_info), serial(next_serial++), name(initname), TeX_name(texname), ret_type(return_types::commutative), ret_type_tinfo(TINFO_symbol), domain(domain)
+{
+ setflag(status_flags::evaluated | status_flags::expanded);
}
-symbol::symbol(const std::string & initname) : inherited(TINFO_symbol)
+symbol::symbol(const std::string & initname, unsigned rt, unsigned rtt, unsigned domain)
+ : inherited(TINFO_symbol), asexinfop(new assigned_ex_info), serial(next_serial++), name(initname), TeX_name(default_TeX_name()), ret_type(rt), ret_type_tinfo(rtt), domain(domain)
{
- name = initname;
- TeX_name = default_TeX_name();
- serial = next_serial++;
- asexinfop = new assigned_ex_info;
setflag(status_flags::evaluated | status_flags::expanded);
}
-symbol::symbol(const std::string & initname, const std::string & texname) : inherited(TINFO_symbol)
+symbol::symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt, unsigned domain)
+ : inherited(TINFO_symbol), asexinfop(new assigned_ex_info), serial(next_serial++), name(initname), TeX_name(texname), ret_type(rt), ret_type_tinfo(rtt), domain(domain)
{
- name = initname;
- TeX_name = texname;
- serial = next_serial++;
- asexinfop = new assigned_ex_info;
setflag(status_flags::evaluated | status_flags::expanded);
}
+// realsymbol
+
+realsymbol::realsymbol(const std::string & initname, unsigned domain)
+ : symbol(initname, domain) { }
+
+realsymbol::realsymbol(const std::string & initname, const std::string & texname, unsigned domain)
+ : symbol(initname, texname, domain) { }
+
+realsymbol::realsymbol(const std::string & initname, unsigned rt, unsigned rtt, unsigned domain)
+ : symbol(initname, rt, rtt, domain) { }
+
+realsymbol::realsymbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt, unsigned domain)
+ : symbol(initname, texname, rt, rtt, domain) { }
+
//////////
// archiving
//////////
/** Construct object from archive_node. */
-symbol::symbol(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
+symbol::symbol(const archive_node &n, lst &sym_lst)
+ : inherited(n, sym_lst), asexinfop(new assigned_ex_info), serial(next_serial++)
{
- serial = next_serial++;
- if (!(n.find_string("name", name)))
+ if (!n.find_string("name", name))
name = autoname_prefix() + ToString(serial);
- if (!(n.find_string("TeXname", TeX_name)))
+ if (!n.find_string("TeXname", TeX_name))
TeX_name = default_TeX_name();
- asexinfop = new assigned_ex_info;
- setflag(status_flags::evaluated);
+ if (!n.find_unsigned("domain", domain))
+ domain = domain::complex;
+ if (!n.find_unsigned("return_type", ret_type))
+ ret_type = return_types::commutative;
+ if (!n.find_unsigned("return_type_tinfo", ret_type_tinfo))
+ ret_type_tinfo = TINFO_symbol;
+ setflag(status_flags::evaluated | status_flags::expanded);
}
/** Unarchive the object. */
-ex symbol::unarchive(const archive_node &n, const lst &sym_lst)
+ex symbol::unarchive(const archive_node &n, lst &sym_lst)
{
ex s = (new symbol(n, sym_lst))->setflag(status_flags::dynallocated);
-
+
// If symbol is in sym_lst, return the existing symbol
- for (unsigned i=0; i<sym_lst.nops(); i++) {
- if (is_ex_of_type(sym_lst.op(i), symbol) && (ex_to<symbol>(sym_lst.op(i)).name == ex_to<symbol>(s).name))
- return sym_lst.op(i);
+ for (lst::const_iterator it = sym_lst.begin(); it != sym_lst.end(); ++it) {
+ if (is_a<symbol>(*it) && (ex_to<symbol>(*it).name == ex_to<symbol>(s).name))
+ return *it;
}
+
+ // Otherwise add new symbol to list and return it
+ sym_lst.append(s);
return s;
}
n.add_string("name", name);
if (TeX_name != default_TeX_name())
n.add_string("TeX_name", TeX_name);
+ if (domain != domain::complex)
+ n.add_unsigned("domain", domain);
+ if (ret_type != return_types::commutative)
+ n.add_unsigned("return_type", ret_type);
+ if (ret_type_tinfo != TINFO_symbol)
+ n.add_unsigned("return_type_tinfo", ret_type_tinfo);
}
//////////
// public
-basic *symbol::duplicate() const
+void symbol::do_print(const print_context & c, unsigned level) const
{
- return new symbol(*this);
+ c.s << name;
}
-void symbol::print(const print_context & c, unsigned level) const
+void symbol::do_print_latex(const print_latex & c, unsigned level) const
{
- if (is_a<print_tree>(c)) {
-
- c.s << std::string(level, ' ') << name << " (" << class_name() << ")"
- << ", serial=" << serial
- << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
- << std::endl;
-
- } else if (is_a<print_latex>(c)) {
- c.s << TeX_name;
- } else if (is_a<print_python_repr>(c)) {
- c.s << class_name() << "('" << name;
- if (TeX_name != default_TeX_name())
- c.s << "','" << TeX_name;
- c.s << "')";
- } else
- c.s << name;
+ c.s << TeX_name;
}
-bool symbol::info(unsigned inf) const
+void symbol::do_print_tree(const print_tree & c, unsigned level) const
{
- if (inf==info_flags::symbol) return true;
- if (inf==info_flags::polynomial ||
- inf==info_flags::integer_polynomial ||
- inf==info_flags::cinteger_polynomial ||
- inf==info_flags::rational_polynomial ||
- inf==info_flags::crational_polynomial ||
- inf==info_flags::rational_function)
- return true;
- else
- return inherited::info(inf);
+ c.s << std::string(level, ' ') << name << " (" << class_name() << ")" << " @" << this
+ << ", serial=" << serial
+ << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
+ << ", domain=" << domain
+ << std::endl;
}
-int symbol::degree(const ex & s) const
+void symbol::do_print_python_repr(const print_python_repr & c, unsigned level) const
{
- return is_equal(ex_to<basic>(s)) ? 1 : 0;
-}
-
-int symbol::ldegree(const ex & s) const
-{
- return is_equal(ex_to<basic>(s)) ? 1 : 0;
+ c.s << class_name() << "('" << name;
+ if (TeX_name != default_TeX_name())
+ c.s << "','" << TeX_name;
+ c.s << "')";
}
-ex symbol::coeff(const ex & s, int n) const
+bool symbol::info(unsigned inf) const
{
- if (is_equal(ex_to<basic>(s)))
- return n==1 ? _ex1 : _ex0;
+ if (inf == info_flags::symbol)
+ return true;
+ if (inf == info_flags::polynomial ||
+ inf == info_flags::integer_polynomial ||
+ inf == info_flags::cinteger_polynomial ||
+ inf == info_flags::rational_polynomial ||
+ inf == info_flags::crational_polynomial ||
+ inf == info_flags::rational_function)
+ return true;
+ if (inf == info_flags::real)
+ return domain == domain::real;
else
- return n==0 ? *this : _ex0;
+ return inherited::info(inf);
}
ex symbol::eval(int level) const
}
}
+ex symbol::conjugate() const
+{
+ if (this->domain == domain::complex) {
+ return GiNaC::conjugate(*this).hold();
+ } else {
+ return *this;
+ }
+}
+
// protected
/** Implementation of ex::diff() for single differentiation of a symbol.
return serial==o->serial;
}
-unsigned symbol::calchash(void) const
+unsigned symbol::calchash() const
{
- // this is where the schoolbook method
- // (golden_ratio_hash(tinfo()) ^ serial)
- // is not good enough yet...
- hashvalue = golden_ratio_hash(golden_ratio_hash(tinfo()) ^ serial);
+ hashvalue = golden_ratio_hash(tinfo() ^ serial);
setflag(status_flags::hash_calculated);
return hashvalue;
}
void symbol::assign(const ex & value)
{
- asexinfop->is_assigned = 1;
+ asexinfop->is_assigned = true;
asexinfop->assigned_expression = value;
clearflag(status_flags::evaluated | status_flags::expanded);
}
-void symbol::unassign(void)
+void symbol::unassign()
{
if (asexinfop->is_assigned) {
- asexinfop->is_assigned = 0;
+ asexinfop->is_assigned = false;
asexinfop->assigned_expression = _ex0;
}
setflag(status_flags::evaluated | status_flags::expanded);
/** Symbols not constructed with a string get one assigned using this
* prefix and a number. */
-std::string & symbol::autoname_prefix(void)
+std::string & symbol::autoname_prefix()
{
static std::string *s = new std::string("symbol");
return *s;
}
/** Return default TeX name for symbol. This recognizes some greek letters. */
-std::string symbol::default_TeX_name(void) const
+std::string symbol::default_TeX_name() const
{
if (name=="alpha" || name=="beta" || name=="gamma"
|| name=="delta" || name=="epsilon" || name=="varepsilon"
//////////
/** Default ctor. Defaults to unassigned. */
-symbol::assigned_ex_info::assigned_ex_info(void) : is_assigned(0), refcount(1)
+symbol::assigned_ex_info::assigned_ex_info() throw() : is_assigned(false)
{
}
git://www.ginac.de / ginac.git / blobdiff