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mesh_inline_impl.hh
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			/**
			* @file mesh_inline_impl.hh
			*
			* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
			* @author Dana Christen <dana.christen@epfl.ch>
			* @author Nicolas Richart <nicolas.richart@epfl.ch>
			* @author Marco Vocialta <marco.vocialta@epfl.ch>
			*
			* @date creation: Thu Jul 15 2010
			* @date last modification: Mon Dec 18 2017
			*
			* @brief Implementation of the inline functions of the mesh class
			*
			*
			* Copyright (©) 2010-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
			* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
			*
			* Akantu is free software: you can redistribute it and/or modify it under the
			* terms of the GNU Lesser General Public License as published by the Free
			* Software Foundation, either version 3 of the License, or (at your option) any
			* later version.
			*
			* Akantu 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 Lesser General Public License for more
			* details.
			*
			* You should have received a copy of the GNU Lesser General Public License
			* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
			*
			*/

			/* -------------------------------------------------------------------------- */
			#include "aka_iterators.hh"
			#include "element_class.hh"
			#include "mesh.hh"
			/* -------------------------------------------------------------------------- */

			#ifndef __AKANTU_MESH_INLINE_IMPL_HH__
			#define __AKANTU_MESH_INLINE_IMPL_HH__

			namespace akantu {

			/* -------------------------------------------------------------------------- */
			/* -------------------------------------------------------------------------- */
			inline ElementKind Element::kind() const { return Mesh::getKind(type); }

			/* -------------------------------------------------------------------------- */
			/* -------------------------------------------------------------------------- */
			template <typename... pack>
			Mesh::ElementTypesIteratorHelper Mesh::elementTypes(pack &&... _pack) const {
			return connectivities.elementTypes(_pack...);
			}

			/* -------------------------------------------------------------------------- */
			inline RemovedNodesEvent::RemovedNodesEvent(const Mesh & mesh,
			const std::string & origin)
			: MeshEvent<UInt>(origin), new_numbering(mesh.getNbNodes(), 1, "new_numbering") {}

			/* -------------------------------------------------------------------------- */
			inline RemovedElementsEvent::RemovedElementsEvent(const Mesh & mesh,
			const ID & new_numbering_id,
			const std::string & origin)
			: MeshEvent<Element>(origin),
			new_numbering(new_numbering_id, mesh.getID(), mesh.getMemoryID()) {}

			/* -------------------------------------------------------------------------- */
			template <>
			inline void Mesh::sendEvent<NewElementsEvent>(NewElementsEvent & event) {
			this->fillNodesToElements();
			/*this->nodes_to_elements.resize(nodes->size());
			for (const auto & elem : event.getList()) {
			const Array<UInt> & conn = connectivities(elem.type, elem.ghost_type);

			UInt nb_nodes_per_elem = this->getNbNodesPerElement(elem.type);
			for (UInt n = 0; n < nb_nodes_per_elem; ++n) {
			UInt node = conn(elem.element, n);
			if (not nodes_to_elements[node])
			nodes_to_elements[node] = std::make_unique<std::set<Element>>();
			nodes_to_elements[node]->insert(elem);
			}
			}*/

			EventHandlerManager<MeshEventHandler>::sendEvent(event);
			}

			/* -------------------------------------------------------------------------- */
			template <> inline void Mesh::sendEvent<NewNodesEvent>(NewNodesEvent & event) {
			this->computeBoundingBox();
			this->nodes_flags->resize(this->nodes->size(), NodeFlag::_normal);
			EventHandlerManager<MeshEventHandler>::sendEvent(event);
			}

			/* -------------------------------------------------------------------------- */
			template <>
			inline void
			Mesh::sendEvent<RemovedElementsEvent>(RemovedElementsEvent & event) {
			this->connectivities.onElementsRemoved(event.getNewNumbering());
			this->fillNodesToElements();
			this->computeBoundingBox();

			EventHandlerManager<MeshEventHandler>::sendEvent(event);
			}

			/* -------------------------------------------------------------------------- */
			template <>
			inline void Mesh::sendEvent<RemovedNodesEvent>(RemovedNodesEvent & event) {
			const auto & new_numbering = event.getNewNumbering();
			this->removeNodesFromArray(*nodes, new_numbering);
			if (nodes_global_ids and not is_mesh_facets)
			this->removeNodesFromArray(*nodes_global_ids, new_numbering);
			if (not is_mesh_facets)
			this->removeNodesFromArray(*nodes_flags, new_numbering);

			if (not nodes_to_elements.empty()) {
			std::vector<std::unique_ptr<std::set<Element>>> tmp(
			nodes_to_elements.size());
			auto it = nodes_to_elements.begin();

			UInt new_nb_nodes = 0;
			for (auto new_i : new_numbering) {
			if (new_i != UInt(-1)) {
			tmp[new_i] = std::move(*it);
			++new_nb_nodes;
			}
			++it;
			}

			tmp.resize(new_nb_nodes);
			std::move(tmp.begin(), tmp.end(), nodes_to_elements.begin());
			}

			computeBoundingBox();

			EventHandlerManager<MeshEventHandler>::sendEvent(event);
			}

			/* -------------------------------------------------------------------------- */
			template <typename T>
			inline void Mesh::removeNodesFromArray(Array<T> & vect,
			const Array<UInt> & new_numbering) {
			Array<T> tmp(vect.size(), vect.getNbComponent());
			UInt nb_component = vect.getNbComponent();
			UInt new_nb_nodes = 0;
			for (UInt i = 0; i < new_numbering.size(); ++i) {
			UInt new_i = new_numbering(i);
			if (new_i != UInt(-1)) {
			T * to_copy = vect.storage() + i * nb_component;
			std::uninitialized_copy(to_copy, to_copy + nb_component,
			tmp.storage() + new_i * nb_component);
			++new_nb_nodes;
			}
			}

			tmp.resize(new_nb_nodes);
			vect.copy(tmp);
			}

			/* -------------------------------------------------------------------------- */
			inline Array<UInt> & Mesh::getNodesGlobalIdsPointer() {
			AKANTU_DEBUG_IN();
			if (not nodes_global_ids) {
			nodes_global_ids = std::make_shared<Array<UInt>>(
			nodes->size(), 1, getID() + ":nodes_global_ids");

			for (auto && global_ids : enumerate(*nodes_global_ids)) {
			std::get<1>(global_ids) = std::get<0>(global_ids);
			}
			}

			AKANTU_DEBUG_OUT();
			return *nodes_global_ids;
			}

			/* -------------------------------------------------------------------------- */
			inline Array<UInt> &
			Mesh::getConnectivityPointer(const ElementType & type,
			const GhostType & ghost_type) {
			if (connectivities.exists(type, ghost_type))
			return connectivities(type, ghost_type);

			if (ghost_type != _not_ghost) {
			ghosts_counters.alloc(0, 1, type, ghost_type, 1);
			}

			AKANTU_DEBUG_INFO("The connectivity vector for the type " << type
			<< " created");

			UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(type);
			return connectivities.alloc(0, nb_nodes_per_element, type, ghost_type);
			}

			/* -------------------------------------------------------------------------- */
			inline Array<std::vector<Element>> &
			Mesh::getElementToSubelementPointer(const ElementType & type,
			const GhostType & ghost_type) {
			return getDataPointer<std::vector<Element>>("element_to_subelement", type,
			ghost_type, 1, true);
			}

			/* -------------------------------------------------------------------------- */
			inline Array<Element> &
			Mesh::getSubelementToElementPointer(const ElementType & type,
			const GhostType & ghost_type) {
			auto & array = getDataPointer<Element>(
			"subelement_to_element", type, ghost_type, getNbFacetsPerElement(type),
			true, is_mesh_facets, ElementNull);
			return array;
			}

			/* -------------------------------------------------------------------------- */
			inline const auto & Mesh::getElementToSubelement() const {
			return getData<std::vector<Element>>("element_to_subelement");
			}

			/* -------------------------------------------------------------------------- */
			inline const auto &
			Mesh::getElementToSubelement(const ElementType & type,
			const GhostType & ghost_type) const {
			return getData<std::vector<Element>>("element_to_subelement", type,
			ghost_type);
			}

			/* -------------------------------------------------------------------------- */
			inline auto & Mesh::getElementToSubelement(const ElementType & type,
			const GhostType & ghost_type) {
			return getData<std::vector<Element>>("element_to_subelement", type,
			ghost_type);
			}

			/* -------------------------------------------------------------------------- */
			inline const auto &
			Mesh::getElementToSubelement(const Element & element) const {
			return getData<std::vector<Element>>("element_to_subelement")(element);
			}

			/* -------------------------------------------------------------------------- */
			inline auto & Mesh::getElementToSubelement(const Element & element) {
			return getData<std::vector<Element>>("element_to_subelement")(element);
			}

			/* -------------------------------------------------------------------------- */
			inline const auto & Mesh::getSubelementToElement() const {
			return getData<Element>("subelement_to_element");
			}

			/* -------------------------------------------------------------------------- */
			inline const auto &
			Mesh::getSubelementToElement(const ElementType & type,
			const GhostType & ghost_type) const {
			return getData<Element>("subelement_to_element", type, ghost_type);
			}

			/* -------------------------------------------------------------------------- */
			inline auto & Mesh::getSubelementToElement(const ElementType & type,
			const GhostType & ghost_type) {
			return getData<Element>("subelement_to_element", type, ghost_type);
			}

			/* -------------------------------------------------------------------------- */
			inline VectorProxy<Element>
			Mesh::getSubelementToElement(const Element & element) const {
			const auto & sub_to_element =
			this->getSubelementToElement(element.type, element.ghost_type);
			auto it = sub_to_element.begin(sub_to_element.getNbComponent());
			return it[element.element];
			}

			/* -------------------------------------------------------------------------- */
			inline VectorProxy<Element>
			Mesh::getSubelementToElement(const Element & element) {
			auto & sub_to_element =
			this->getSubelementToElement(element.type, element.ghost_type);
			auto it = sub_to_element.begin(sub_to_element.getNbComponent());
			return it[element.element];
			}

			/* -------------------------------------------------------------------------- */
			template <typename T>
			inline Array<T> &
			Mesh::getDataPointer(const ID & data_name, const ElementType & el_type,
			const GhostType & ghost_type, UInt nb_component,
			bool size_to_nb_element, bool resize_with_parent) {
			Array<T> & tmp = this->getElementalDataArrayAlloc<T>(
			data_name, el_type, ghost_type, nb_component);

			if (size_to_nb_element) {
			if (resize_with_parent)
			tmp.resize(mesh_parent->getNbElement(el_type, ghost_type));
			else
			tmp.resize(this->getNbElement(el_type, ghost_type));
			} else {
			tmp.resize(0);
			}

			return tmp;
			}

			/* -------------------------------------------------------------------------- */
			template <typename T>
			inline Array<T> &
			Mesh::getDataPointer(const ID & data_name, const ElementType & el_type,
			const GhostType & ghost_type, UInt nb_component,
			bool size_to_nb_element, bool resize_with_parent,
			const T & defaul_) {
			Array<T> & tmp = this->getElementalDataArrayAlloc<T>(
			data_name, el_type, ghost_type, nb_component);

			if (size_to_nb_element) {
			if (resize_with_parent)
			tmp.resize(mesh_parent->getNbElement(el_type, ghost_type), defaul_);
			else
			tmp.resize(this->getNbElement(el_type, ghost_type), defaul_);
			} else {
			tmp.resize(0);
			}

			return tmp;
			}

			/* -------------------------------------------------------------------------- */
			template <typename T>
			inline const Array<T> & Mesh::getData(const ID & data_name,
			const ElementType & el_type,
			const GhostType & ghost_type) const {
			return this->getElementalDataArray<T>(data_name, el_type, ghost_type);
			}

			/* -------------------------------------------------------------------------- */
			template <typename T>
			inline Array<T> & Mesh::getData(const ID & data_name,
			const ElementType & el_type,
			const GhostType & ghost_type) {
			return this->getElementalDataArray<T>(data_name, el_type, ghost_type);
			}

			/* -------------------------------------------------------------------------- */
			template <typename T>
			inline const ElementTypeMapArray<T> &
			Mesh::getData(const ID & data_name) const {
			return this->getElementalData<T>(data_name);
			}

			/* -------------------------------------------------------------------------- */
			template <typename T>
			inline ElementTypeMapArray<T> & Mesh::getData(const ID & data_name) {
			return this->getElementalData<T>(data_name);
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNbElement(const ElementType & type,
			const GhostType & ghost_type) const {
			try {

			const Array<UInt> & conn = connectivities(type, ghost_type);
			return conn.size();
			} catch (...) {
			return 0;
			}
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNbElement(const UInt spatial_dimension,
			const GhostType & ghost_type,
			const ElementKind & kind) const {
			AKANTU_DEBUG_ASSERT(spatial_dimension <= 3 \|\| spatial_dimension == UInt(-1),
			"spatial_dimension is " << spatial_dimension
			<< " and is greater than 3 !");
			UInt nb_element = 0;

			for (auto type : elementTypes(spatial_dimension, ghost_type, kind))
			nb_element += getNbElement(type, ghost_type);

			return nb_element;
			}

			/* -------------------------------------------------------------------------- */
			inline void Mesh::getBarycenter(const Element & element,
			Vector<Real> & barycenter) const {
			Vector<UInt> conn = getConnectivity(element);
			Matrix<Real> local_coord(spatial_dimension, conn.size());
			auto node_begin = make_view(*nodes, spatial_dimension).begin();

			for (auto && node : enumerate(conn)) {
			local_coord(std::get<0>(node)) =
			Vector<Real>(node_begin[std::get<1>(node)]);
			}

			Math::barycenter(local_coord.storage(), conn.size(), spatial_dimension,
			barycenter.storage());
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNbNodesPerElement(const ElementType & type) {
			UInt nb_nodes_per_element = 0;
			#define GET_NB_NODES_PER_ELEMENT(type) \
			nb_nodes_per_element = ElementClass<type>::getNbNodesPerElement()
			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_NB_NODES_PER_ELEMENT);
			#undef GET_NB_NODES_PER_ELEMENT
			return nb_nodes_per_element;
			}

			/* -------------------------------------------------------------------------- */
			inline ElementType Mesh::getP1ElementType(const ElementType & type) {
			ElementType p1_type = _not_defined;
			#define GET_P1_TYPE(type) p1_type = ElementClass<type>::getP1ElementType()

			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_P1_TYPE);
			#undef GET_P1_TYPE
			return p1_type;
			}

			/* -------------------------------------------------------------------------- */
			inline ElementKind Mesh::getKind(const ElementType & type) {
			ElementKind kind = _ek_not_defined;
			#define GET_KIND(type) kind = ElementClass<type>::getKind()
			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_KIND);
			#undef GET_KIND
			return kind;
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getSpatialDimension(const ElementType & type) {
			UInt spatial_dimension = 0;
			#define GET_SPATIAL_DIMENSION(type) \
			spatial_dimension = ElementClass<type>::getSpatialDimension()
			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_SPATIAL_DIMENSION);
			#undef GET_SPATIAL_DIMENSION

			return spatial_dimension;
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNaturalSpaceDimension(const ElementType & type) {
			UInt natural_dimension = 0;
			#define GET_NATURAL_DIMENSION(type) \
			natural_dimension = ElementClass<type>::getNaturalSpaceDimension()
			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_NATURAL_DIMENSION);
			#undef GET_NATURAL_DIMENSION

			return natural_dimension;
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNbFacetTypes(const ElementType & type,
			__attribute__((unused)) UInt t) {
			UInt nb = 0;
			#define GET_NB_FACET_TYPE(type) nb = ElementClass<type>::getNbFacetTypes()

			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_NB_FACET_TYPE);
			#undef GET_NB_FACET_TYPE
			return nb;
			}

			/* -------------------------------------------------------------------------- */
			inline constexpr auto Mesh::getFacetType(const ElementType & type, UInt t) {
			#define GET_FACET_TYPE(type) return ElementClass<type>::getFacetType(t);

			AKANTU_BOOST_ALL_ELEMENT_SWITCH_NO_DEFAULT(GET_FACET_TYPE);

			#undef GET_FACET_TYPE

			return _not_defined;
			}

			/* -------------------------------------------------------------------------- */
			inline constexpr auto Mesh::getAllFacetTypes(const ElementType & type) {
			#define GET_FACET_TYPE(type) return ElementClass<type>::getFacetTypes();

			AKANTU_BOOST_ALL_ELEMENT_SWITCH_NO_DEFAULT(GET_FACET_TYPE);
			#undef GET_FACET_TYPE

			return ElementClass<_not_defined>::getFacetTypes();
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNbFacetsPerElement(const ElementType & type) {
			AKANTU_DEBUG_IN();

			UInt n_facet = 0;
			#define GET_NB_FACET(type) n_facet = ElementClass<type>::getNbFacetsPerElement()

			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_NB_FACET);
			#undef GET_NB_FACET

			AKANTU_DEBUG_OUT();
			return n_facet;
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNbFacetsPerElement(const ElementType & type, UInt t) {
			AKANTU_DEBUG_IN();

			UInt n_facet = 0;
			#define GET_NB_FACET(type) \
			n_facet = ElementClass<type>::getNbFacetsPerElement(t)

			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_NB_FACET);
			#undef GET_NB_FACET

			AKANTU_DEBUG_OUT();
			return n_facet;
			}

			/* -------------------------------------------------------------------------- */
			inline auto Mesh::getFacetLocalConnectivity(const ElementType & type, UInt t) {
			AKANTU_DEBUG_IN();

			#define GET_FACET_CON(type) \
			AKANTU_DEBUG_OUT(); \
			return ElementClass<type>::getFacetLocalConnectivityPerElement(t)

			AKANTU_BOOST_ALL_ELEMENT_SWITCH(GET_FACET_CON);
			#undef GET_FACET_CON

			AKANTU_DEBUG_OUT();
			return ElementClass<_not_defined>::getFacetLocalConnectivityPerElement(0);
			// This avoid a compilation warning but will certainly
			// also cause a segfault if reached
			}

			/* -------------------------------------------------------------------------- */
			inline auto Mesh::getFacetConnectivity(const Element & element, UInt t) const {
			AKANTU_DEBUG_IN();

			Matrix<const UInt> local_facets(getFacetLocalConnectivity(element.type, t));
			Matrix<UInt> facets(local_facets.rows(), local_facets.cols());

			const Array<UInt> & conn = connectivities(element.type, element.ghost_type);

			for (UInt f = 0; f < facets.rows(); ++f) {
			for (UInt n = 0; n < facets.cols(); ++n) {
			facets(f, n) = conn(element.element, local_facets(f, n));
			}
			}

			AKANTU_DEBUG_OUT();
			return facets;
			}

			/* -------------------------------------------------------------------------- */
			inline VectorProxy<UInt> Mesh::getConnectivity(const Element & element) const {
			const auto & conn = connectivities(element.type, element.ghost_type);
			auto it = conn.begin(conn.getNbComponent());
			return it[element.element];
			}

			/* -------------------------------------------------------------------------- */
			inline VectorProxy<UInt> Mesh::getConnectivity(const Element & element) {
			auto & conn = connectivities(element.type, element.ghost_type);
			auto it = conn.begin(conn.getNbComponent());
			return it[element.element];
			}

			/* -------------------------------------------------------------------------- */
			template <typename T>
			inline void Mesh::extractNodalValuesFromElement(
			const Array<T> & nodal_values, T * local_coord, UInt * connectivity,
			UInt n_nodes, UInt nb_degree_of_freedom) const {
			for (UInt n = 0; n < n_nodes; ++n) {
			memcpy(local_coord + n * nb_degree_of_freedom,
			nodal_values.storage() + connectivity[n] * nb_degree_of_freedom,
			nb_degree_of_freedom * sizeof(T));
			}
			}

			/* -------------------------------------------------------------------------- */
			inline void Mesh::addConnectivityType(const ElementType & type,
			const GhostType & ghost_type) {
			getConnectivityPointer(type, ghost_type);
			}

			/* -------------------------------------------------------------------------- */
			inline bool Mesh::isPureGhostNode(UInt n) const {
			return ((*nodes_flags)(n)&NodeFlag::_shared_mask) == NodeFlag::_pure_ghost;
			}

			/* -------------------------------------------------------------------------- */
			inline bool Mesh::isLocalOrMasterNode(UInt n) const {
			return ((*nodes_flags)(n)&NodeFlag::_local_master_mask) == NodeFlag::_normal;
			}

			/* -------------------------------------------------------------------------- */
			inline bool Mesh::isLocalNode(UInt n) const {
			return ((*nodes_flags)(n)&NodeFlag::_shared_mask) == NodeFlag::_normal;
			}

			/* -------------------------------------------------------------------------- */
			inline bool Mesh::isMasterNode(UInt n) const {
			return ((*nodes_flags)(n)&NodeFlag::_shared_mask) == NodeFlag::_master;
			}

			/* -------------------------------------------------------------------------- */
			inline bool Mesh::isSlaveNode(UInt n) const {
			return ((*nodes_flags)(n)&NodeFlag::_shared_mask) == NodeFlag::_slave;
			}

			/* -------------------------------------------------------------------------- */
			inline bool Mesh::isPeriodicSlave(UInt n) const {
			return ((*nodes_flags)(n)&NodeFlag::_periodic_mask) ==
			NodeFlag::_periodic_slave;
			}

			/* -------------------------------------------------------------------------- */
			inline bool Mesh::isPeriodicMaster(UInt n) const {
			return ((*nodes_flags)(n)&NodeFlag::_periodic_mask) ==
			NodeFlag::_periodic_master;
			}

			/* -------------------------------------------------------------------------- */
			inline NodeFlag Mesh::getNodeFlag(UInt local_id) const {
			return (*nodes_flags)(local_id);
			}

			/* -------------------------------------------------------------------------- */
			inline Int Mesh::getNodePrank(UInt local_id) const {
			auto it = nodes_prank.find(local_id);
			return it == nodes_prank.end() ? -1 : it->second;
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNodeGlobalId(UInt local_id) const {
			return nodes_global_ids ? (*nodes_global_ids)(local_id) : local_id;
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNodeLocalId(UInt global_id) const {
			if (nodes_global_ids == nullptr)
			return global_id;
			return nodes_global_ids->find(global_id);
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNbGlobalNodes() const {
			return nodes_global_ids ? nb_global_nodes : nodes->size();
			}

			/* -------------------------------------------------------------------------- */
			inline UInt Mesh::getNbNodesPerElementList(const Array<Element> & elements) {
			UInt nb_nodes_per_element = 0;
			UInt nb_nodes = 0;
			ElementType current_element_type = _not_defined;

			for (const auto & el : elements) {
			if (el.type != current_element_type) {
			current_element_type = el.type;
			nb_nodes_per_element = Mesh::getNbNodesPerElement(current_element_type);
			}

			nb_nodes += nb_nodes_per_element;
			}

			return nb_nodes;
			}

			/* -------------------------------------------------------------------------- */
			inline Mesh & Mesh::getMeshFacets() {
			if (!this->mesh_facets)
			AKANTU_SILENT_EXCEPTION(
			"No facet mesh is defined yet! check the buildFacets functions");

			return *this->mesh_facets;
			}

			/* -------------------------------------------------------------------------- */
			inline const Mesh & Mesh::getMeshFacets() const {
			if (!this->mesh_facets)
			AKANTU_SILENT_EXCEPTION(
			"No facet mesh is defined yet! check the buildFacets functions");

			return *this->mesh_facets;
			}
			/* -------------------------------------------------------------------------- */
			inline const Mesh & Mesh::getMeshParent() const {
			if (!this->mesh_parent)
			AKANTU_SILENT_EXCEPTION(
			"No parent mesh is defined! This is only valid in a mesh_facets");

			return *this->mesh_parent;
			}

			/* -------------------------------------------------------------------------- */
			void Mesh::addPeriodicSlave(UInt slave, UInt master) {
			if (master == slave)
			return;

			// if pair already registered
			auto master_slaves = periodic_master_slave.equal_range(master);
			auto slave_it =
			std::find_if(master_slaves.first, master_slaves.second,
			[&](auto & pair) { return pair.second == slave; });
			if (slave_it == master_slaves.second) {
			// no duplicates
			periodic_master_slave.insert(std::make_pair(master, slave));
			AKANTU_DEBUG_INFO("adding periodic slave, slave gid:"
			<< getNodeGlobalId(slave) << " [lid: " << slave << "]"
			<< ", master gid:" << getNodeGlobalId(master)
			<< " [lid: " << master << "]");
			// std::cout << "adding periodic slave, slave gid:" <<
			// getNodeGlobalId(slave)
			// << " [lid: " << slave << "]"
			// << ", master gid:" << getNodeGlobalId(master)
			// << " [lid: " << master << "]" << std::endl;
			}

			periodic_slave_master[slave] = master;

			auto set_flag = [&](auto node, auto flag) {
			(*nodes_flags)[node] &= ~NodeFlag::_periodic_mask; // clean periodic flags
			(*nodes_flags)[node] \|= flag;
			};

			set_flag(slave, NodeFlag::_periodic_slave);
			set_flag(master, NodeFlag::_periodic_master);
			}

			/* -------------------------------------------------------------------------- */
			UInt Mesh::getPeriodicMaster(UInt slave) const {
			return periodic_slave_master.at(slave);
			}

			/* -------------------------------------------------------------------------- */
			class Mesh::PeriodicSlaves {
			using internal_iterator = std::unordered_multimap<UInt, UInt>::const_iterator;
			std::pair<internal_iterator, internal_iterator> pair;

			public:
			PeriodicSlaves(const Mesh & mesh, UInt master)
			: pair(mesh.getPeriodicMasterSlaves().equal_range(master)) {}

			PeriodicSlaves(const PeriodicSlaves & other) = default;
			PeriodicSlaves(PeriodicSlaves && other) = default;
			PeriodicSlaves & operator=(const PeriodicSlaves & other) = default;

			class const_iterator {
			internal_iterator it;

			public:
			const_iterator(internal_iterator it) : it(std::move(it)) {}

			const_iterator operator++() {
			++it;
			return *this;
			}
			bool operator!=(const const_iterator & other) { return other.it != it; }
			auto operator*() { return it->second; }
			};

			auto begin() { return const_iterator(pair.first); }
			auto end() { return const_iterator(pair.second); }
			};

			/* -------------------------------------------------------------------------- */
			inline decltype(auto) Mesh::getPeriodicSlaves(UInt master) const {
			return PeriodicSlaves(*this, master);
			}

			/* -------------------------------------------------------------------------- */
			inline Vector<UInt>
			Mesh::getConnectivityWithPeriodicity(const Element & element) const {
			Vector<UInt> conn = getConnectivity(element);
			if (not isPeriodic()) {
			return conn;
			}

			for (auto && node : conn) {
			if (isPeriodicSlave(node)) {
			node = getPeriodicMaster(node);
			}
			}

			return conn;
			}

			} // namespace akantu

			#endif /* __AKANTU_MESH_INLINE_IMPL_HH__ */

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rAKA/src/mesh/mesh_inline_impl.hh
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mesh_inline_impl.hh
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