Remove ancient trunk folder from svn repository

[synfig.git] / ETL / ETL / _trivial.h

diff --git a/ETL/ETL/_trivial.h b/ETL/ETL/_trivial.h
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+/*! ========================================================================
+** Extended Template Library
+** Trivializing Template Class Implementation
+** $Id$
+**
+** Copyright (c) 2002 Robert B. Quattlebaum Jr.
+**
+** This package is free software; you can redistribute it and/or
+** modify it under the terms of the GNU General Public License as
+** published by the Free Software Foundation; either version 2 of
+** the License, or (at your option) any later version.
+**
+** This package is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** General Public License for more details.
+**
+** === N O T E S ===========================================================
+**
+** This is an internal header file, included by other ETL headers.
+** You should not attempt to use it directly.
+**
+** ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __ETL__TRIVIAL_H
+#define __ETL__TRIVIAL_H
+
+/* === H E A D E R S ======================================================= */
+
+/* === M A C R O S ========================================================= */
+
+/* === T Y P E D E F S ===================================================== */
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+_ETL_BEGIN_NAMESPACE
+
+/*! ========================================================================
+** \class      Trivial
+** \brief      Trivializes the constructor of a given class
+**
+** This class makes the given type 'trivial',
+** effectively disabling the constructor and
+** destructor. (This is useful for unions)
+** Some extra casting may be necessary to get
+** it to work properly.
+*/
+template <class T>
+class trivial
+{
+       typedef T value_type;
+       typedef T& reference;
+       typedef const T& const_reference;
+       typedef T* pointer;
+       typedef const T* const_pointer;
+
+       char data[sizeof(T)];
+public:
+       operator reference()
+       { return *reinterpret_cast<pointer>(data); }
+
+       // HACK - Rather dangerous
+       //operator reference()const
+       //{ return *reinterpret_cast<pointer>(const_cast<char *>(data)); }
+
+       operator const_reference()const
+       { return *reinterpret_cast<const_pointer>(data); }
+
+       reference get()
+       { return *reinterpret_cast<pointer>(data); }
+
+       const_reference get()const
+       { return *reinterpret_cast<const_pointer>(data); }
+
+       void construct()
+       { new(&get()) value_type(); }
+
+       void destruct()
+       { get().~value_type(); }
+
+       void destroy() { destruct(); }
+
+       template<class U> reference
+       operator=(const U &rhs)
+       { return get()=rhs; }
+
+       template<class U>reference
+       operator=(const trivial<U> &rhs)
+       { return get()=rhs.get(); }
+
+       template<class U> reference
+       operator+=(const U &rhs)
+       { return get()+=rhs; }
+
+       template<class U> reference
+       operator-=(const U &rhs)
+       { return get()-=rhs; }
+
+       template<class U> reference
+       operator*=(const U &rhs)
+       { return get()*=rhs; }
+
+       template<class U> reference
+       operator/=(const U &rhs)
+       { return get()/=rhs; }
+
+       template<class U> reference
+       operator%=(const U &rhs)
+       { return get()%=rhs; }
+
+       template<class U> reference
+       operator^=(const U &rhs)
+       { return get()^=rhs; }
+
+       template<class U> reference
+       operator&=(const U &rhs)
+       { return get()&=rhs; }
+
+       template<class U> reference
+       operator>>=(const U &rhs)
+       { return get()>>=rhs; }
+
+       template<class U> reference
+       operator<<=(const U &rhs)
+       { return get()<<=rhs; }
+
+       operator bool()const
+       { return get(); }
+
+       bool operator!()const
+       { return !get(); }
+}; // END of template class trivial
+
+_ETL_END_NAMESPACE
+
+//#include <iostream>
+
+/*
+template<typename T, typename _CharT, class _Traits> std::basic_istream<_CharT, _Traits>&
+operator>>(std::basic_istream<_CharT, _Traits>& s, etl::trivial<T>& rhs)
+{ return s>>(T)(rhs); }
+
+template<typename T,typename _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>&
+operator<<(std::basic_ostream<_CharT, _Traits>& s, const etl::trivial<T>& rhs)
+{ return s<<(T)(rhs); }
+*/
+
+/*
+template<typename T> std::istream&
+operator>>(std::istream& s, etl::trivial<T>& rhs)
+{ return s>>(T)(rhs); }
+
+template<typename T> std::ostream&
+operator<<(std::ostream& s, const etl::trivial<T>& rhs)
+{ return s<<(T)(rhs); }
+*/
+
+/* === E X T E R N S ======================================================= */
+
+/* === E N D =============================================================== */
+
+#endif