101 lines
3.1 KiB
C++
101 lines
3.1 KiB
C++
/*
|
|
GENERATOR-COMBINATIONS.hpp - generate combinations and variations
|
|
|
|
Copyright (C) Lumiera.org
|
|
2011, Hermann Vosseler <Ichthyostega@web.de>
|
|
|
|
This program 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 program 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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
*/
|
|
|
|
|
|
/** @file generator-combinations.hpp
|
|
** Metaprogramming facilities to generate combination cases.
|
|
** Similar to the plain typelist-based generators, a custom supplied
|
|
** template will be instantiated with combinations of the parameter types
|
|
** and then mixed into the resulting type
|
|
**
|
|
** @see generator-combinations-test.cpp
|
|
** @see generator.hpp
|
|
**
|
|
*/
|
|
|
|
|
|
#ifndef LIB_META_GENERATOR_COMBINATIONS_H
|
|
#define LIB_META_GENERATOR_COMBINATIONS_H
|
|
|
|
#include "lib/meta/typelist.hpp"
|
|
#include "lib/meta/typelist-manip.hpp"
|
|
#include "lib/meta/generator.hpp"
|
|
|
|
|
|
|
|
namespace lib {
|
|
namespace meta{
|
|
|
|
|
|
template<class TYPES_1, class TYPES_2>
|
|
struct CartesianProduct
|
|
: Distribute< typename TYPES_1::List
|
|
, typename TYPES_2::List
|
|
>
|
|
{ };
|
|
|
|
|
|
|
|
template< template<class,class,class> class _X_>
|
|
struct PickParametersFromSublist
|
|
{
|
|
template<class SUBLIST, class BASE>
|
|
struct SingleCaseInstantiation
|
|
: _X_< typename Pick<SUBLIST,0>::Type
|
|
, typename Pick<SUBLIST,1>::Type
|
|
, BASE
|
|
>
|
|
{ };
|
|
};
|
|
|
|
|
|
/**
|
|
* Build a Case matrix.
|
|
* The given parameter template _X_
|
|
* will be instantiated for each possible combination
|
|
* of the elements from both parameter type-lists.
|
|
* All these instantiations will be chained up
|
|
* into a linear inheritance chain rooted
|
|
* at the BASE type.
|
|
* @note the custom-supplied template _X_ needs to take a 3rd parameter,
|
|
* and inherit from this parameter, in order to form that chain.
|
|
* Typically you'll define some (static) functions within that
|
|
* template, which then forward the call to the given BASE
|
|
* (and of course, that BASE then needs to define this
|
|
* function as well).
|
|
*/
|
|
template
|
|
< class TYPES_1, class TYPES_2 ///< the two type collections to pick combinations from
|
|
, template<class,class,class> class _X_ ///< template with two arg types and a base type
|
|
, class BASE = NullType
|
|
>
|
|
struct InstantiateChainedCombinations
|
|
: InstantiateChained< typename CartesianProduct<TYPES_1,TYPES_2>::List
|
|
, PickParametersFromSublist<_X_>::template SingleCaseInstantiation
|
|
, BASE
|
|
>
|
|
{ };
|
|
|
|
|
|
|
|
}} // namespace lib::meta
|
|
#endif
|