* Implementation of GiNaC's symbolic objects. */
/*
- * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2001 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 "idx.h"
+#include "print.h"
#include "archive.h"
#include "debugmsg.h"
#include "utils.h"
-#ifndef NO_NAMESPACE_GINAC
namespace GiNaC {
-#endif // ndef NO_NAMESPACE_GINAC
-GINAC_IMPLEMENT_REGISTERED_CLASS(symbol, basic)
+GINAC_IMPLEMENT_REGISTERED_CLASS_NO_CTORS(symbol, basic)
//////////
-// default constructor, destructor, copy constructor assignment operator and helpers
+// default ctor, dtor, copy ctor assignment operator and helpers
//////////
-symbol::symbol() : inherited(TINFO_symbol)
+symbol::symbol() : inherited(TINFO_symbol), serial(next_serial++)
{
- debugmsg("symbol default constructor", LOGLEVEL_CONSTRUCT);
- serial = next_serial++;
- name = autoname_prefix()+ToString(serial);
+ debugmsg("symbol default ctor", LOGLEVEL_CONSTRUCT);
+ name = TeX_name = autoname_prefix()+ToString(serial);
asexinfop = new assigned_ex_info;
- setflag(status_flags::evaluated);
-}
-
-symbol::~symbol()
-{
- debugmsg("symbol destructor", LOGLEVEL_DESTRUCT);
- destroy(0);
-}
-
-symbol::symbol(const symbol & other)
-{
- debugmsg("symbol copy constructor", LOGLEVEL_CONSTRUCT);
- copy(other);
+ 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;
void symbol::destroy(bool call_parent)
{
- if (--asexinfop->refcount == 0) {
+ if (--asexinfop->refcount == 0)
delete asexinfop;
- }
- if (call_parent) {
+ if (call_parent)
inherited::destroy(call_parent);
- }
}
-// how should the following be interpreted?
-// symbol x;
-// symbol y;
-// x=y;
-// probably as: x=ex(y);
-
//////////
-// other constructors
+// other ctors
//////////
// public
+symbol::symbol(const symbol & other)
+{
+ debugmsg("symbol copy ctor", LOGLEVEL_CONSTRUCT);
+ copy(other);
+}
+
symbol::symbol(const std::string & initname) : inherited(TINFO_symbol)
{
- debugmsg("symbol constructor from string", LOGLEVEL_CONSTRUCT);
+ debugmsg("symbol ctor from string", LOGLEVEL_CONSTRUCT);
name = initname;
+ TeX_name = default_TeX_name();
serial = next_serial++;
asexinfop = new assigned_ex_info;
- setflag(status_flags::evaluated);
+ setflag(status_flags::evaluated | status_flags::expanded);
+}
+
+symbol::symbol(const std::string & initname, const std::string & texname) : inherited(TINFO_symbol)
+{
+ debugmsg("symbol ctor from string", LOGLEVEL_CONSTRUCT);
+ name = initname;
+ TeX_name = texname;
+ serial = next_serial++;
+ asexinfop = new assigned_ex_info;
+ setflag(status_flags::evaluated | status_flags::expanded);
}
//////////
/** Construct object from archive_node. */
symbol::symbol(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
{
- debugmsg("symbol constructor from archive_node", LOGLEVEL_CONSTRUCT);
+ debugmsg("symbol ctor from archive_node", LOGLEVEL_CONSTRUCT);
serial = next_serial++;
if (!(n.find_string("name", name)))
name = autoname_prefix() + ToString(serial);
+ if (!(n.find_string("TeXname", TeX_name)))
+ TeX_name = default_TeX_name();
asexinfop = new assigned_ex_info;
setflag(status_flags::evaluated);
}
ex symbol::unarchive(const archive_node &n, const 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))
+ 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);
}
return s;
{
inherited::archive(n);
n.add_string("name", name);
+ if (TeX_name != default_TeX_name())
+ n.add_string("TeX_name", TeX_name);
}
//////////
return new symbol(*this);
}
-void symbol::print(std::ostream & os, unsigned upper_precedence) const
+void symbol::print(const print_context & c, unsigned level) const
{
- debugmsg("symbol print",LOGLEVEL_PRINT);
- os << name;
-}
+ debugmsg("symbol print", LOGLEVEL_PRINT);
-void symbol::printraw(std::ostream & os) const
-{
- debugmsg("symbol printraw",LOGLEVEL_PRINT);
- os << "symbol(" << "name=" << name << ",serial=" << serial
- << ",hash=" << hashvalue << ",flags=" << flags << ")";
-}
+ if (is_of_type(c, print_tree)) {
-void symbol::printtree(std::ostream & os, unsigned indent) const
-{
- debugmsg("symbol printtree",LOGLEVEL_PRINT);
- os << std::string(indent,' ') << name << " (symbol): "
- << "serial=" << serial
- << ", hash=" << hashvalue
- << " (0x" << std::hex << hashvalue << std::dec << ")"
- << ", flags=" << flags << std::endl;
-}
+ c.s << std::string(level, ' ') << name << " (" << class_name() << ")"
+ << ", serial=" << serial
+ << std::hex << ", hash=0x" << hashvalue << ", flags=0x" << flags << std::dec
+ << std::endl;
-void symbol::printcsrc(std::ostream & os, unsigned type, unsigned upper_precedence) const
-{
- debugmsg("symbol print csrc", LOGLEVEL_PRINT);
- os << name;
+ } else if (is_of_type(c, print_latex))
+ c.s << TeX_name;
+ else
+ c.s << name;
}
bool symbol::info(unsigned inf) 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) {
+ 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 {
+ else
return inherited::info(inf);
- }
-}
-
-ex symbol::expand(unsigned options) const
-{
- return this->hold();
}
-bool symbol::has(const ex & other) const
+int symbol::degree(const ex & s) const
{
- if (is_equal(*other.bp)) return true;
- return false;
+ return is_equal(*s.bp) ? 1 : 0;
}
-int symbol::degree(const symbol & s) const
+int symbol::ldegree(const ex & s) const
{
- return compare_same_type(s)==0 ? 1 : 0;
+ return is_equal(*s.bp) ? 1 : 0;
}
-int symbol::ldegree(const symbol & s) const
+ex symbol::coeff(const ex & s, int n) const
{
- return compare_same_type(s)==0 ? 1 : 0;
-}
-
-ex symbol::coeff(const symbol & s, int n) const
-{
- if (compare_same_type(s)==0) {
+ if (is_equal(*s.bp))
return n==1 ? _ex1() : _ex0();
- } else {
+ else
return n==0 ? *this : _ex0();
- }
}
ex symbol::eval(int level) const
{
- if (level == -max_recursion_level) {
+ if (level == -max_recursion_level)
throw(std::runtime_error("max recursion level reached"));
- }
if (asexinfop->is_assigned) {
setflag(status_flags::evaluated);
- if (level==1) {
+ if (level==1)
return (asexinfop->assigned_expression);
- } else {
+ else
return (asexinfop->assigned_expression).eval(level);
- }
} else {
return this->hold();
}
}
-ex symbol::subs(const lst & ls, const lst & lr) const
-{
- GINAC_ASSERT(ls.nops()==lr.nops());
-#ifdef DO_GINAC_ASSERT
- for (unsigned i=0; i<ls.nops(); i++) {
- GINAC_ASSERT(is_ex_exactly_of_type(ls.op(i),symbol)||
- is_ex_of_type(ls.op(i),idx));
- }
-#endif // def DO_GINAC_ASSERT
-
- for (unsigned i=0; i<ls.nops(); i++) {
- if (is_ex_exactly_of_type(ls.op(i),symbol)) {
- if (compare_same_type(ex_to_symbol(ls.op(i)))==0) return lr.op(i);
- }
- }
- return *this;
-}
-
// protected
/** Implementation of ex::diff() for single differentiation of a symbol.
* @see ex::diff */
ex symbol::derivative(const symbol & s) const
{
- if (compare_same_type(s)) {
+ if (compare_same_type(s))
return _ex0();
- } else {
+ else
return _ex1();
- }
}
int symbol::compare_same_type(const basic & other) const
unsigned symbol::calchash(void) const
{
- // return golden_ratio_hash(tinfo()) ^ serial;
- hashvalue=golden_ratio_hash(golden_ratio_hash(0x55555555U ^ serial));
+ // 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);
setflag(status_flags::hash_calculated);
return hashvalue;
}
void symbol::assign(const ex & value)
{
- asexinfop->is_assigned=1;
- asexinfop->assigned_expression=value;
- clearflag(status_flags::evaluated);
+ asexinfop->is_assigned = 1;
+ asexinfop->assigned_expression = value;
+ clearflag(status_flags::evaluated | status_flags::expanded);
}
void symbol::unassign(void)
{
if (asexinfop->is_assigned) {
- asexinfop->is_assigned=0;
- asexinfop->assigned_expression=_ex0();
+ asexinfop->is_assigned = 0;
+ asexinfop->assigned_expression = _ex0();
}
- setflag(status_flags::evaluated);
+ setflag(status_flags::evaluated | status_flags::expanded);
}
// private
+/** Symbols not constructed with a string get one assigned using this
+ * prefix and a number. */
std::string & symbol::autoname_prefix(void)
{
- static std::string * s=new std::string("symbol");
+ 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
+{
+ if (name=="alpha" || name=="beta" || name=="gamma"
+ || name=="delta" || name=="epsilon" || name=="varepsilon"
+ || name=="zeta" || name=="eta" || name=="theta"
+ || name=="vartheta" || name=="iota" || name=="kappa"
+ || name=="lambda" || name=="mu" || name=="nu"
+ || name=="xi" || name=="omicron" || name=="pi"
+ || name=="varpi" || name=="rho" || name=="varrho"
+ || name=="sigma" || name=="varsigma" || name=="tau"
+ || name=="upsilon" || name=="phi" || name=="varphi"
+ || name=="chi" || name=="psi" || name=="omega"
+ || name=="Gamma" || name=="Delta" || name=="Theta"
+ || name=="Lambda" || name=="Xi" || name=="Pi"
+ || name=="Sigma" || name=="Upsilon" || name=="Phi"
+ || name=="Psi" || name=="Omega")
+ return "\\" + name;
+ else
+ return name;
+}
+
//////////
// static member variables
//////////
// private
-unsigned symbol::next_serial=0;
-
-// std::string const symbol::autoname_prefix="symbol";
-
-//////////
-// global constants
-//////////
-
-const symbol some_symbol;
-const type_info & typeid_symbol=typeid(some_symbol);
+unsigned symbol::next_serial = 0;
//////////
// subclass assigned_ex_info
{
}
-#ifndef NO_NAMESPACE_GINAC
} // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC
git://www.ginac.de / ginac.git / blobdiff