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/* Copyright (c) 1997-2024
Ewgenij Gawrilow, Michael Joswig, and the polymake team
Technische Universität Berlin, Germany
https://polymake.org
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, or (at your option) any
later version: http://www.gnu.org/licenses/gpl.txt.
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.
--------------------------------------------------------------------------------
*/
#pragma once
namespace pm {
template <typename IncMatrixRef, typename ElemRef>
class SameElementSparseMatrix
: public GenericMatrix< SameElementSparseMatrix<IncMatrixRef, ElemRef>,
typename object_traits<typename deref<ElemRef>::type>::persistent_type > {
protected:
using matrix_alias_t = alias<IncMatrixRef>;
using elem_alias_t = alias<ElemRef>;
matrix_alias_t matrix;
elem_alias_t apparent_elem;
public:
using value_type = typename deref<ElemRef>::type;
using const_reference = const value_type&;
using reference = const_reference;
template <typename Arg1, typename Arg2,
typename=std::enable_if_t<std::is_constructible<matrix_alias_t, Arg1>::value &&
std::is_constructible<elem_alias_t, Arg2>::value>>
SameElementSparseMatrix(Arg1&& matrix_arg, Arg2&& data_arg)
: matrix(std::forward<Arg1>(matrix_arg))
, apparent_elem(std::forward<Arg2>(data_arg)) {}
decltype(auto) get_matrix() const { return *matrix; }
const elem_alias_t& get_apparent_element() const { return apparent_elem; }
};
template <typename IncMatrixRef, typename ElemRef>
struct spec_object_traits< SameElementSparseMatrix<IncMatrixRef, ElemRef> >
: spec_object_traits<is_container> {
static constexpr bool is_temporary = true, is_always_const = true;
};
template <typename IncMatrixRef, typename ElemRef>
struct check_container_feature< SameElementSparseMatrix<IncMatrixRef, ElemRef>, Symmetric >
: check_container_ref_feature< IncMatrixRef, Symmetric > {};
template <typename IncMatrixRef, typename ElemRef>
struct check_container_feature< SameElementSparseMatrix<IncMatrixRef, ElemRef>, pure_sparse> : std::true_type {};
template <typename IncMatrixRef, typename ElemRef>
class matrix_random_access_methods< SameElementSparseMatrix<IncMatrixRef, ElemRef> > {
typedef SameElementSparseMatrix<IncMatrixRef, ElemRef> master;
public:
const typename deref<ElemRef>::type& operator() (Int i, Int j) const
{
const master& me=static_cast<const master&>(*this);
if (me.get_matrix()(i,j)) return *me.get_apparent_element();
return zero_value<typename deref<ElemRef>::type>();
}
};
template <typename IncMatrixRef, typename ElemRef>
class Rows< SameElementSparseMatrix<IncMatrixRef, ElemRef> >
: public modified_container_pair_impl< Rows< SameElementSparseMatrix<IncMatrixRef, ElemRef> >,
mlist< Container1RefTag< masquerade<Rows, IncMatrixRef> >,
Container2RefTag< same_value_container<ElemRef> >,
OperationTag< operations::construct_binary<SameElementSparseVector> >,
MasqueradedTop > > {
typedef modified_container_pair_impl<Rows> base_t;
public:
decltype(auto) get_container1() const
{
return rows(this->hidden().get_matrix());
}
decltype(auto) get_container2() const
{
return as_same_value_container(this->hidden().get_apparent_element());
}
};
template <typename IncMatrixRef, typename ElemRef>
class Cols< SameElementSparseMatrix<IncMatrixRef, ElemRef> >
: public modified_container_pair_impl< Cols< SameElementSparseMatrix<IncMatrixRef,ElemRef> >,
mlist< Container1RefTag< masquerade<Cols, IncMatrixRef> >,
Container2RefTag< same_value_container<ElemRef> >,
OperationTag< operations::construct_binary<SameElementSparseVector> >,
MasqueradedTop > > {
typedef modified_container_pair_impl<Cols> base_t;
public:
decltype(auto) get_container1() const
{
return cols(this->hidden().get_matrix());
}
decltype(auto) get_container2() const
{
return as_same_value_container(this->hidden().get_apparent_element());
}
};
template <typename E, typename TMatrix>
auto same_element_sparse_matrix(TMatrix&& m, E&& x, std::enable_if_t<is_generic_incidence_matrix<TMatrix>::value, void**> =nullptr)
{
return SameElementSparseMatrix<add_const_t<unwary_t<TMatrix&&>>, prevent_int_element<E&&>>(unwary(std::forward<TMatrix>(m)), std::forward<E>(x));
}
template <typename E, typename TMatrix>
auto same_element_sparse_matrix(TMatrix&& m, std::enable_if_t<is_generic_incidence_matrix<TMatrix>::value, void**> =nullptr)
{
return same_element_sparse_matrix(std::forward<TMatrix>(m), one_value<E>(), nullptr);
}
template <typename MatrixRef>
class IndexMatrix
: public GenericIncidenceMatrix< IndexMatrix<MatrixRef> > {
protected:
using alias_t = alias<MatrixRef>;
alias_t matrix;
public:
using value_type = bool;
using reference = bool;
using const_reference = bool;
template <typename Arg, typename=std::enable_if_t<std::is_constructible<alias_t, Arg>::value>>
explicit IndexMatrix(Arg&& matrix_arg)
: matrix(std::forward<Arg>(matrix_arg)) {}
decltype(auto) get_matrix() const { return *matrix; }
};
template <typename MatrixRef>
struct check_container_feature< IndexMatrix<MatrixRef>, Symmetric >
: check_container_ref_feature<MatrixRef, Symmetric> {};
template <typename MatrixRef>
struct spec_object_traits< IndexMatrix<MatrixRef> >
: spec_object_traits<is_container> {
static constexpr bool is_temporary = true, is_always_const = true;
};
template <typename MatrixRef>
class matrix_random_access_methods< IndexMatrix<MatrixRef> > {
typedef IndexMatrix<MatrixRef> master;
public:
bool operator() (Int i, Int j) const
{
const master& me = static_cast<const master&>(*this);
return !me.row(i).find(j).at_end();
}
};
template <typename MatrixRef>
class Rows< IndexMatrix<MatrixRef> >
: public modified_container_impl< Rows< IndexMatrix<MatrixRef> >,
mlist< MasqueradedTop,
ContainerRefTag< masquerade<pm::Rows, MatrixRef> >,
OperationTag< operations::construct_unary<Indices> > > > {
protected:
Rows();
~Rows();
public:
decltype(auto) get_container() const { return rows(this->hidden().get_matrix()); }
};
template <typename MatrixRef>
class Cols< IndexMatrix<MatrixRef> >
: public modified_container_impl< Cols< IndexMatrix<MatrixRef> >,
mlist< MasqueradedTop,
ContainerRefTag< masquerade<pm::Cols, MatrixRef> >,
OperationTag< operations::construct_unary<Indices> > > > {
protected:
Cols();
~Cols();
public:
decltype(auto) get_container() const { return cols(this->hidden().get_matrix()); }
};
template <typename TMatrix, typename=std::enable_if_t<check_container_feature<TMatrix, sparse>::value>>
auto index_matrix(const GenericMatrix<TMatrix>& m)
{
return IndexMatrix<const TMatrix&>(m.top());
}
} // end namespace pm
namespace polymake {
using pm::same_element_sparse_matrix;
using pm::index_matrix;
}
// Local Variables:
// mode:C++
// c-basic-offset:3
// indent-tabs-mode:nil
// End:
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