57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/*
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SYMBOL.hpp - symbolic constant datatype
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Copyright (C) Lumiera.org
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2008, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/** @file symbol.hpp
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** WIP placeholder definition for a planned Symbol datatype.
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**
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** @todo for the (currently just planned as of 11/08) rules based configuration
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** in the Proc-Layer a explicit Symbol datatype will probably very helpful.
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** For now we just a typedef is sufficient. A real Symbol datatype should
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** - be definable by string constant
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** - integrate smoothly with std::string
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** - provide a unique numeric index for each distinct Symbol
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** - automatically maintain a symbol table at runtime to support this
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** - provide some magic (macros) allowing to build distinct types based on symbols.
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**
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** @see configrules.hpp
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** @see query.hpp
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*/
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#ifndef LUMIERA_SYMBOL_H
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#define LUMIERA_SYMBOL_H
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#include <string>
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namespace lumiera {
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typedef const char * const Symbol; ///< Token or Atom with distinct identity @todo define a real Symbol class, i.e. same literal string==same pointer,
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typedef const std::string Literal; ///< inline string literal @todo improve interaction with Symbol
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} // namespace lumiera
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#endif
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