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muSpectre/src/common/field_map_dynamic.hh
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field_map_dynamic.hh
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/**
* @file field_map_dynamic.hh
*
* @author Till Junge <till.junge@epfl.ch>
*
* @date 24 Jul 2018
*
* @brief Field map for dynamically sized maps. for use in non-critical
* applications (i.e., i/o, postprocessing, etc, but *not* in a hot
* loop
*
* Copyright © 2018 Till Junge
*
* µSpectre 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, or (at
* your option) any later version.
*
* µSpectre 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 GNU Emacs; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef FIELD_MAP_DYNAMIC_H
#define FIELD_MAP_DYNAMIC_H
#include "common/field_map_base.hh"
namespace muSpectre {
/**
* Maps onto any `muSpectre::TypedField` and lets you iterate over
* it in the form of `Eigen::Map<Eigen::Array<T, Eigen::Dynamic,
* 1>`. This is significantly slower than the statically sized field
* maps and should only be used in non-critical contexts.
*/
template <class FieldCollection, typename T, bool ConstField=false>
class TypedFieldMap: public internal::FieldMap<FieldCollection, T,
Eigen::Dynamic, ConstField>
{
public:
//! base class
using Parent = internal::FieldMap<FieldCollection, T,
Eigen::Dynamic, ConstField>;
//! sister class with all params equal, but ConstField guaranteed true
using ConstMap = TypedFieldMap<FieldCollection, T, true>;
//! cell coordinates type
using Ccoord = Ccoord_t<FieldCollection::spatial_dim()>;
//! plain Eigen type
using Arr_t = Eigen::Array<T, Eigen::Dynamic, 1>;
using value_type = Eigen::Map<Arr_t>; //!< stl conformance
using const_reference = Eigen::Map<const Arr_t>; //!< stl conformance
//! stl conformance
using reference = std::conditional_t<ConstField,
const_reference,
value_type>; // since it's a resource handle
using size_type = typename Parent::size_type; //!< stl conformance
using pointer = std::unique_ptr<value_type>; //!< stl conformance
//! polymorphic base field type (for debug and python)
using Field = typename Parent::Field;
//! polymorphic base field type (for debug and python)
using Field_c = typename Parent::Field_c;
//! stl conformance
using const_iterator = typename Parent::template iterator<TypedFieldMap, true>;
//! stl conformance
using iterator = std::conditional_t<
ConstField,
const_iterator,
typename Parent::template iterator<TypedFieldMap>>;
//! stl conformance
using reverse_iterator = std::reverse_iterator<iterator>;
//! stl conformance
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
//! enumerator over a constant scalar field
using const_enumerator = typename Parent::template enumerator<const_iterator>;
//! enumerator over a scalar field
using enumerator = std::conditional_t<
ConstField,
const_enumerator,
typename Parent::template enumerator<iterator>>;
//! give access to the protected fields
friend iterator;
//! Default constructor
TypedFieldMap() = delete;
//! Constructor
TypedFieldMap(Field_c & field);
//! Copy constructor
TypedFieldMap(const TypedFieldMap & other) = delete;
//! Move constructor
TypedFieldMap(TypedFieldMap &&other) = default;
//! Destructor
virtual ~TypedFieldMap() = default;
//! Copy assignment operator
TypedFieldMap& operator=(const TypedFieldMap &other) = delete;
//! Assign a matrixlike value to every entry
template <class Derived>
inline TypedFieldMap & operator=(const Eigen::EigenBase<Derived> & val);
//! Move assignment operator
TypedFieldMap& operator=(TypedFieldMap &&other) = default;
//! give human-readable field map type
inline std::string info_string() const override final;
//! member access
inline reference operator[](size_type index);
//! member access
inline reference operator[](const Ccoord & ccoord);
//! member access
inline const_reference operator[](size_type index) const;
//! member access
inline const_reference operator[](const Ccoord& ccoord) const;
//! return an iterator to first entry of field
inline iterator begin(){return iterator(*this);}
//! return an iterator to first entry of field
inline const_iterator cbegin() const {return const_iterator(*this);}
//! return an iterator to first entry of field
inline const_iterator begin() const {return this->cbegin();}
//! return an iterator past the last entry of field
inline iterator end(){return iterator(*this, false);}
//! return an iterator past the last entry of field
inline const_iterator cend() const {return const_iterator(*this, false);}
//! return an iterator past the last entry of field
inline const_iterator end() const {return this->cend();}
/**
* return an iterable proxy to this field that can be iterated
* in Ccoord-value tuples
*/
enumerator enumerate() {return enumerator(*this);}
/**
* return an iterable proxy to this field that can be iterated
* in Ccoord-value tuples
*/
const_enumerator enumerate() const {return const_enumerator(*this);}
//! evaluate the average of the field
inline Arr_t mean() const;
protected:
//! for sad, legacy iterator use
inline pointer ptr_to_val_t(size_type index);
private:
};
//----------------------------------------------------------------------------//
template <class FieldCollection, typename T, bool ConstField>
TypedFieldMap<FieldCollection, T, ConstField>::
TypedFieldMap(Field_c & field):
Parent(field) {
this->check_compatibility();
}
//----------------------------------------------------------------------------//
template <class FieldCollection, typename T, bool ConstField>
std::string TypedFieldMap<FieldCollection, T, ConstField>::
info_string() const {
std::stringstream info;
info << "Dynamic(" << typeid(T).name() << ", "
<< this->field.get_nb_components()
<< ")";
return info.str();
}
//----------------------------------------------------------------------------//
template <class FieldCollection, typename T, bool ConstField>
auto TypedFieldMap<FieldCollection, T, ConstField>::
operator[](size_type index) -> reference {
return reference{this->get_ptr_to_entry(index),
Dim_t(this->field.get_nb_components())};
}
//----------------------------------------------------------------------------//
template <class FieldCollection, typename T, bool ConstField>
auto TypedFieldMap<FieldCollection, T, ConstField>::
operator[](const Ccoord & ccoord) -> reference {
size_t index{this->collection.get_index(ccoord)};
return (*this)[index];
}
//----------------------------------------------------------------------------//
template <class FieldCollection, typename T, bool ConstField>
auto TypedFieldMap<FieldCollection, T, ConstField>::
operator[](size_type index) const -> const_reference {
return const_reference{this->get_ptr_to_entry(index),
Dim_t(this->field.get_nb_components())};
}
//----------------------------------------------------------------------------//
template <class FieldCollection, typename T, bool ConstField>
auto TypedFieldMap<FieldCollection, T, ConstField>::
operator[](const Ccoord & ccoord) const -> const_reference {
size_t index{this->collection.get_index(ccoord)};
return (*this)[index];
}
} // muSpectre
#endif /* FIELD_MAP_DYNAMIC_H */
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