Ichthyostega
2c90335b1d
concrete quantiser instances need a way to state support for just some timecode formats -- yet I dont want to push vectors aroud all over the place
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/*
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NO-INSTANCE.hpp - marker for pure metaprogramming types
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Copyright (C) Lumiera.org
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2011, 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
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the 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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#ifndef LIB_META_NO_INSTANCE_H
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#define LIB_META_NO_INSTANCE_H
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#include <boost/static_assert.hpp>
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namespace lib {
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namespace meta{
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/**
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* An Entity never to be instantiated.
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* Marker baseclass for elements used for metaprogramming only.
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* Every attempt to instantiate such an element will cause an
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* compilation failure
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*/
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template<class X>
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struct NoInstance
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{
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NoInstance() { BOOST_STATIC_ASSERT(!sizeof(X)); }
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NoInstance (NoInstance const&) { BOOST_STATIC_ASSERT(!sizeof(X)); }
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};
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}} // namespace lib::meta
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#endif
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