dft_tools/triqs/arrays/impl/traits.hpp

/*******************************************************************************
 *
 * TRIQS: a Toolbox for Research in Interacting Quantum Systems
 *
 * Copyright (C) 2012 by O. Parcollet
 *
 * TRIQS 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 3 of the License, or (at your option) any later
 * version.
 *
 * TRIQS 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
 * TRIQS. If not, see <http://www.gnu.org/licenses/>.
 *
 ******************************************************************************/
#ifndef TRIQS_ARRAYS_IMPL_TRAITS_H
#define TRIQS_ARRAYS_IMPL_TRAITS_H
#include <boost/mpl/or.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
#include <boost/concept_check.hpp>
#include <triqs/utility/concept_tools.hpp>

namespace triqs { namespace arrays {
 namespace mpl=boost::mpl; 

 // The ImmutableArray concept 
 TRIQS_DEFINE_CONCEPT_AND_ASSOCIATED_TRAIT(ImmutableArray);
 TRIQS_DEFINE_CONCEPT_AND_ASSOCIATED_TRAIT_R(MutableArray,(ImmutableArray));

 /*template <class X> struct BCC_ImmutableArray { 
  BOOST_CONCEPT_USAGE(BCC_ImmutableArray)
  {
   typename X::mc_weight_type r = i.Try();  // this is e.g. for a QMC move  
   r = i.Accept();
   i.Reject();
  }
  private: X i;
 };
*/

  // The ImmutableCuboidArray concept 
 TRIQS_DEFINE_CONCEPT_AND_ASSOCIATED_TRAIT_R(ImmutableCuboidArray,(ImmutableArray));
 TRIQS_DEFINE_CONCEPT_AND_ASSOCIATED_TRAIT_R(MutableCuboidArray,(ImmutableCuboidArray)(MutableArray));
 
 // The ImmutableMatrix concept 
 TRIQS_DEFINE_CONCEPT_AND_ASSOCIATED_TRAIT_R(ImmutableMatrix,(ImmutableArray));
 TRIQS_DEFINE_CONCEPT_AND_ASSOCIATED_TRAIT_R(MutableMatrix,(ImmutableMatrix)(MutableArray));

 // The ImmutableVector concept 
 TRIQS_DEFINE_CONCEPT_AND_ASSOCIATED_TRAIT_R(ImmutableVector,(ImmutableArray));
 TRIQS_DEFINE_CONCEPT_AND_ASSOCIATED_TRAIT_R(MutableVector,(ImmutableVector)(MutableArray));

 namespace Tag { struct array{}; struct array_view {}; }
 template <typename T> struct is_array : std::is_base_of<Tag::array,T> {};
 template <typename T> struct is_array_view : std::is_base_of<Tag::array_view,T> {};
 template <typename T> struct is_array_or_view : boost::mpl::or_< is_array<T>, is_array_view<T> > {};

 namespace Tag { struct vector{}; struct vector_view {};}
 template <typename T> struct is_vector : std::is_base_of<Tag::vector,T> {};
 template <typename T> struct is_vector_view : std::is_base_of<Tag::vector_view,T> {};
 template <typename T> struct is_vector_or_view : boost::mpl::or_< is_vector<T>, is_vector_view<T> > {};

 namespace Tag { struct matrix_view {}; struct matrix {}; }
 template <typename T> struct is_matrix : std::is_base_of<Tag::matrix,T> {};
 template <typename T> struct is_matrix_view : std::is_base_of<Tag::matrix_view,T> {};
 template <typename T> struct is_matrix_or_view : boost::mpl::or_< is_matrix<T>, is_matrix_view<T> > {};

 template <class T> struct is_amv_value_class : boost::mpl::or_< is_array<T>, is_matrix<T>, is_vector<T> > {};
 template <class T> struct is_amv_view_class : boost::mpl::or_< is_array_view<T>, is_matrix_view<T>, is_vector_view<T> > {};
 template <class T> struct is_amv_value_or_view_class : boost::mpl::or_< is_amv_value_class<T>, is_amv_view_class<T> > {};

 template <class S> struct is_scalar : boost::mpl::or_<std::is_arithmetic<S > , boost::is_complex<S> > {};
 
 template<class S, class A> struct is_scalar_for : 
  boost::mpl::if_<is_scalar<typename A::value_type > , is_scalar<S>,boost::is_same<S,typename A::value_type > >::type {};

}}//namespace triqs::arrays
#endif