* Implementation of GiNaC's symbolic objects. */
/*
- * GiNaC Copyright (C) 1999-2004 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
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string>
// default constructor
//////////
+// 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(symbol_options::complex)
+ : inherited(&symbol::tinfo_static), serial(next_serial++), name(autoname_prefix() + ToString(serial)), TeX_name(name), domain(domain::complex), ret_type(return_types::commutative), ret_type_tinfo(make_return_type_t<symbol>())
{
setflag(status_flags::evaluated | status_flags::expanded);
}
+// realsymbol
+
+realsymbol::realsymbol()
+{
+ domain = domain::real;
+}
+
+// possymbol
+
+possymbol::possymbol()
+{
+ domain = domain::positive;
+}
+
//////////
// other constructors
//////////
// public
+// 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)
+ : inherited(&symbol::tinfo_static), serial(next_serial++), name(initname), TeX_name(default_TeX_name()), domain(domain), ret_type(return_types::commutative), ret_type_tinfo(make_return_type_t<symbol>())
{
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)
+symbol::symbol(const std::string & initname, unsigned rt, const return_type_t& rtt, unsigned domain)
+ : inherited(&symbol::tinfo_static), serial(next_serial++), name(initname), TeX_name(default_TeX_name()), domain(domain), ret_type(rt), ret_type_tinfo(rtt)
{
setflag(status_flags::evaluated | status_flags::expanded);
}
-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)
+symbol::symbol(const std::string & initname, const std::string & texname, unsigned domain)
+ : inherited(&symbol::tinfo_static), serial(next_serial++), name(initname), TeX_name(texname), domain(domain), ret_type(return_types::commutative), ret_type_tinfo(make_return_type_t<symbol>())
{
setflag(status_flags::evaluated | status_flags::expanded);
}
-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)
+symbol::symbol(const std::string & initname, const std::string & texname, unsigned rt, const return_type_t& rtt, unsigned domain)
+ : inherited(&symbol::tinfo_static), serial(next_serial++), name(initname), TeX_name(texname), domain(domain), ret_type(rt), ret_type_tinfo(rtt)
{
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, const return_type_t& rtt, unsigned domain)
+ : symbol(initname, rt, rtt, domain) { }
+
+realsymbol::realsymbol(const std::string & initname, const std::string & texname, unsigned rt, const return_type_t& rtt, unsigned domain)
+ : symbol(initname, texname, rt, rtt, domain) { }
+
+// possymbol
+
+possymbol::possymbol(const std::string & initname, unsigned domain)
+ : symbol(initname, domain) { }
+
+possymbol::possymbol(const std::string & initname, const std::string & texname, unsigned domain)
+ : symbol(initname, texname, domain) { }
+
+possymbol::possymbol(const std::string & initname, unsigned rt, const return_type_t& rtt, unsigned domain)
+ : symbol(initname, rt, rtt, domain) { }
+
+possymbol::possymbol(const std::string & initname, const std::string & texname, unsigned rt, const return_type_t& rtt, unsigned domain)
+ : symbol(initname, texname, rt, rtt, domain) { }
+
//////////
// archiving
//////////
/** Construct object from archive_node. */
symbol::symbol(const archive_node &n, lst &sym_lst)
- : inherited(n, sym_lst), asexinfop(new assigned_ex_info), serial(next_serial++)
+ : inherited(n, sym_lst), 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();
if (!n.find_unsigned("domain", domain))
- domain = symbol_options::complex;
+ 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);
}
n.add_string("name", name);
if (TeX_name != default_TeX_name())
n.add_string("TeX_name", TeX_name);
- if (domain != symbol_options::complex)
+ 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);
}
//////////
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)
- return true;
- else
- return inherited::info(inf);
+ switch (inf) {
+ case info_flags::symbol:
+ case info_flags::polynomial:
+ case info_flags::integer_polynomial:
+ case info_flags::cinteger_polynomial:
+ case info_flags::rational_polynomial:
+ case info_flags::crational_polynomial:
+ case info_flags::rational_function:
+ case info_flags::expanded:
+ return true;
+ case info_flags::real:
+ return domain == domain::real || domain == domain::positive;
+ case info_flags::positive:
+ case info_flags::nonnegative:
+ return domain == domain::positive;
+ case info_flags::has_indices:
+ return false;
+ }
+ return inherited::info(inf);
}
-ex symbol::eval(int level) const
+ex symbol::conjugate() const
{
- if (level == -max_recursion_level)
- throw(std::runtime_error("max recursion level reached"));
-
- if (asexinfop->is_assigned) {
- setflag(status_flags::evaluated);
- if (level==1)
- return (asexinfop->assigned_expression);
- else
- return (asexinfop->assigned_expression).eval(level);
+ if (this->domain == domain::complex) {
+ return conjugate_function(*this).hold();
} else {
- return this->hold();
+ return *this;
}
}
-ex symbol::conjugate() const
+ex symbol::real_part() const
{
- if (this->domain == symbol_options::complex) {
- return GiNaC::conjugate(*this).hold();
- } else {
+ if (domain==domain::real || domain==domain::positive)
return *this;
- }
+ return real_part_function(*this).hold();
+}
+
+ex symbol::imag_part() const
+{
+ if (domain==domain::real || domain==domain::positive)
+ return 0;
+ return imag_part_function(*this).hold();
+}
+
+bool symbol::is_polynomial(const ex & var) const
+{
+ return true;
}
// protected
unsigned symbol::calchash() const
{
- hashvalue = golden_ratio_hash(tinfo() ^ serial);
+ const void* this_tinfo = (const void*)typeid(*this).name();
+ hashvalue = golden_ratio_hash((p_int)this_tinfo ^ serial);
setflag(status_flags::hash_calculated);
return hashvalue;
}
// non-virtual functions in this class
//////////
-// public
-
-void symbol::assign(const ex & value)
-{
- asexinfop->is_assigned = true;
- asexinfop->assigned_expression = value;
- clearflag(status_flags::evaluated | status_flags::expanded);
-}
-
-void symbol::unassign()
-{
- if (asexinfop->is_assigned) {
- asexinfop->is_assigned = false;
- asexinfop->assigned_expression = _ex0;
- }
- 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()
+std::string& symbol::autoname_prefix()
{
- static std::string *s = new std::string("symbol");
- return *s;
+ static std::string s("symbol");
+ return s;
}
/** Return default TeX name for symbol. This recognizes some greek letters. */
unsigned symbol::next_serial = 0;
-//////////
-// subclass assigned_ex_info
-//////////
-
-/** Default ctor. Defaults to unassigned. */
-symbol::assigned_ex_info::assigned_ex_info() throw() : is_assigned(false)
-{
-}
-
} // namespace GiNaC
git://www.ginac.de / ginac.git / blobdiff