X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fsymbol.h;h=a166382f5d3b7b21317d20004a16a8d3c63cc31f;hp=a8e667f4c0277e5ab23e58753dd4217730404a1f;hb=6715b097ae926fecfc62e53d4af38b7217634908;hpb=8dc09f48182574d792a2ed7c37b66831d9267a6c

diff --git a/ginac/symbol.h b/ginac/symbol.h
index a8e667f4..a166382f 100644
--- a/ginac/symbol.h
+++ b/ginac/symbol.h
@@ -3,7 +3,7 @@
  *  Interface to GiNaC's symbolic objects. */
 
 /*
- *  GiNaC Copyright (C) 1999-2004 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2005 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
@@ -17,7 +17,7 @@
  *
  *  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
  */
 
 #ifndef __GINAC_SYMBOL_H__
@@ -40,6 +40,8 @@ class symbol : public basic
 {
 	GINAC_DECLARE_REGISTERED_CLASS(symbol, basic)
 
+	friend class realsymbol;
+
 // types
 	
 	/** Symbols as keys to expressions - only for ginsh. */
@@ -54,10 +56,10 @@ class symbol : public basic
 	
 	// other constructors
 public:
-	explicit symbol(const std::string & initname, unsigned domain = symbol_options::complex);
-	symbol(const std::string & initname, const std::string & texname, unsigned domain = symbol_options::complex);
-	symbol(const std::string & initname, unsigned rt, unsigned rtt, unsigned domain = symbol_options::complex);
-	symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt, unsigned domain = symbol_options::complex);
+	explicit symbol(const std::string & initname, unsigned domain = domain::complex);
+	symbol(const std::string & initname, const std::string & texname, unsigned domain = domain::complex);
+	symbol(const std::string & initname, unsigned rt, unsigned rtt, unsigned domain = domain::complex);
+	symbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt, unsigned domain = domain::complex);
 	
 	// functions overriding virtual functions from base classes
 public:
@@ -108,12 +110,31 @@ private:
 };
 
 
+/** Specialization of symbol to real domain */
+class realsymbol : public symbol
+{
+	// constructors
+public:
+	realsymbol();
+	explicit realsymbol(const std::string & initname, unsigned domain = domain::real);
+	realsymbol(const std::string & initname, const std::string & texname, unsigned domain = domain::real);
+	realsymbol(const std::string & initname, unsigned rt, unsigned rtt, unsigned domain = domain::real);
+	realsymbol(const std::string & initname, const std::string & texname, unsigned rt, unsigned rtt, unsigned domain = domain::real);
+};
+
+
 // utility functions
 
 /** Specialization of is_exactly_a<symbol>(obj) for symbol objects. */
 template<> inline bool is_exactly_a<symbol>(const basic & obj)
 {
-	return obj.tinfo()==TINFO_symbol;
+	return obj.tinfo() == TINFO_symbol;
+}
+
+/** Specialization of is_exactly_a<realsymbol>(obj) for realsymbol objects. */
+template<> inline bool is_exactly_a<realsymbol>(const basic & obj)
+{
+	return (obj.tinfo() == TINFO_symbol) && (static_cast<const symbol &>(obj).get_domain() == domain::real);
 }
 
 // wrapper functions around member functions