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// file : Utility/Hetero/TypeList.hpp
// author : Boris Kolpackov <boris@kolpackov.net>
// copyright : Copyright (c) 2002-2003 Boris Kolpackov
// license : http://kolpackov.net/license.html
#ifndef UTILITY_HETERO_TYPE_LIST_HPP
#define UTILITY_HETERO_TYPE_LIST_HPP
namespace Utility
{
namespace Hetero
{
class NullType {};
template <typename t0 = NullType,
typename t1 = NullType,
typename t2 = NullType>
struct TypeList
{
typedef t0 T0;
typedef t1 T1;
typedef t2 T2;
};
template <typename t0, typename t1>
struct TypeList<t0, t1, NullType>
{
typedef t0 T0;
typedef t1 T1;
};
template <typename t0>
struct TypeList<t0, NullType, NullType>
{
typedef t0 T0;
};
template <>
struct TypeList<NullType, NullType, NullType>
{
};
}
}
#endif // UTILITY_HETERO_TYPE_LIST_HPP
//$Id$
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