GroovX: src/rutz/value.h Source File

00001 
00003 
00004 //
00005 // Copyright (c) 1999-2004 California Institute of Technology
00006 // Copyright (c) 2004-2007 University of Southern California
00007 // Rob Peters <rjpeters at usc dot edu>
00008 //
00009 // created: Tue Sep 28 11:19:17 1999
00010 // commit: $Id: value.h 10065 2007-04-12 05:54:56Z rjpeters $
00011 // $HeadURL: file:///lab/rjpeters/svnrepo/code/trunk/groovx/src/rutz/value.h $
00012 //
00013 // --------------------------------------------------------------------
00014 //
00015 // This file is part of GroovX.
00016 //   [http://ilab.usc.edu/rjpeters/groovx/]
00017 //
00018 // GroovX is free software; you can redistribute it and/or modify it
00019 // under the terms of the GNU General Public License as published by
00020 // the Free Software Foundation; either version 2 of the License, or
00021 // (at your option) any later version.
00022 //
00023 // GroovX is distributed in the hope that it will be useful, but
00024 // WITHOUT ANY WARRANTY; without even the implied warranty of
00025 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00026 // General Public License for more details.
00027 //
00028 // You should have received a copy of the GNU General Public License
00029 // along with GroovX; if not, write to the Free Software Foundation,
00030 // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
00031 //
00033 
00034 #ifndef GROOVX_RUTZ_VALUE_H_UTC20050626084020_DEFINED
00035 #define GROOVX_RUTZ_VALUE_H_UTC20050626084020_DEFINED
00036 
00037 #include <iosfwd>
00038 
00039 namespace rutz
00040 {
00041   class fstring;
00042   class value;
00043 }
00044 
00046 
00055 
00056 
00057 class rutz::value
00058 {
00059 public:
00060 
00062   value();
00063 
00065   virtual ~value();
00066 
00068   virtual rutz::fstring value_typename() const = 0;
00069 
00071   virtual void print_to(std::ostream& os) const = 0;
00072 
00074   virtual void scan_from(std::istream& is) = 0;
00075 
00077 
00079   rutz::fstring get_string() const;
00080 
00082 
00084   void set_string(rutz::fstring val);
00085 };
00086 
00088 //
00089 // Global stream insertion/extraction operators for rutz::value
00090 //
00092 
00093 inline std::ostream& operator<<(std::ostream& os,
00094                                 const rutz::value& val)
00095 {
00096   val.print_to(os);
00097   return os;
00098 }
00099 
00100 inline std::istream& operator>>(std::istream& is,
00101                                 rutz::value& val)
00102 {
00103   val.scan_from(is);
00104   return is;
00105 }
00106 
00107 static const char __attribute__((used)) vcid_groovx_rutz_value_h_utc20050626084020[] = "$Id: value.h 10065 2007-04-12 05:54:56Z rjpeters $ $HeadURL: file:
00108 #endif // !GROOVX_RUTZ_VALUE_H_UTC20050626084020_DEFINED