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	diff --git a/examples/agent-functionalities/agent-functionalities.cpp b/examples/agent-functionalities/agent-functionalities.cpp
	index 47dd576..8f111db 100644
	--- a/examples/agent-functionalities/agent-functionalities.cpp
	+++ b/examples/agent-functionalities/agent-functionalities.cpp
	@@ -1,211 +1,211 @@
	//===-- examples/agent-functionalities/agent-functionalities.cpp -- C++--===//
	//
	// The RoSA Framework
	//
	//===----------------------------------------------------------------------===//
	///
	/// \file examples/agent-functionalities/agent-functionalities.cpp
	///
	/// \author David Juhasz (david.juhasz@tuwien.ac.at)
	///
	/// \date 2017
	///
	/// \brief A simple example on defining \c rosa::Agent instances using
	/// \c rosa::agent::Functionality object as components.
	///
	//===----------------------------------------------------------------------===//

	#include "rosa/agent/Abstraction.hpp"
	#include "rosa/agent/Confidence.hpp"
	#include "rosa/agent/FunctionAbstractions.hpp"
	#include "rosa/agent/RangeConfidence.hpp"

	#include "rosa/config/version.h"

	#include "rosa/core/Agent.hpp"
	#include "rosa/core/MessagingSystem.hpp"

	#include "rosa/support/log.h"
	#include "rosa/support/terminal_colors.h"

	#include <vector>

	using namespace rosa;
	using namespace rosa::agent;
	using namespace rosa::terminal;

	/// A dummy wrapper for testing \c rosa::MessagingSystem.
	///
	/// \note Since we test \c rosa::MessagingSystem directly here, we need to get
	/// access to its protected members. That we do by imitating to be a decent
	/// subclass of \c rosa::MessagingSystem, while calling protected member
	/// functions on an object of a type from which we actually don't inherit.
	struct SystemTester : protected MessagingSystem {
	template <typename T, typename... Funs>
	static AgentHandle createMyAgent(MessagingSystem *S, const std::string &Name,
	Funs &&... Fs) {
	return ((SystemTester *)S)->createAgent<T>(Name, std::move(Fs)...);
	}

	static void destroyMyAgent(MessagingSystem *S, const AgentHandle &H) {
	((SystemTester *)S)->destroyUnit(unwrapAgent(H));
	}
	};

	/// A special \c rosa::Agent with its own state.
	class MyAgent : public Agent {
	public:
	using Tick = AtomConstant<atom("tick")>;

	private:
	enum class Categories { Bad, Normal, Good };

	static const std::map<Categories, const char *> CategoryNames;
	StaticLengthHistory<uint8_t, 10, HistoryPolicy::FIFO> H;
	Confidence<uint8_t> C;
	RangeAbstraction<uint8_t, Categories> A;
	PartialFunction<int, int> L;
	RangeConfidence<float, Categories, float> RCL;
	RangeConfidence<float, Categories, float> RCS;

	public:
	void handler(Tick, uint8_t V) noexcept {
	// Record \p V to the \c rosa::agent::History, then print state info.
	H << V;
	ASSERT(H.entry() == V); // Sanity check.
	LOG_INFO_STREAM << "\nNext value: " << PRINTABLE(V)
	<< ", confidence: " << C(H)
	<< ", category: " << CategoryNames.at(A(H.entry()))
	<< ", partial: " << int(L(H.entry()))
	<< ", range-confidence-linear: ";

	- std::map<Categories, float> res_lin = RCL(H.entry());
	- for (auto i : res_lin) {
	- LOG_INFO_STREAM << " " << CategoryNames.at(i.first) << " " << i.second
	+ std::map<Categories, float> ResLin = RCL(H.entry());
	+ for (auto Con : ResLin) {
	+ LOG_INFO_STREAM << " " << CategoryNames.at(Con.first) << " " << Con.second
	<< ",";
	}
	LOG_INFO_STREAM << " range-confidence-sine: ";
	- std::map<Categories, float> res_sine = RCS(H.entry());
	- for (auto i : res_sine) {
	- LOG_INFO_STREAM << " " << CategoryNames.at(i.first) << " " << i.second
	+ std::map<Categories, float> ResSine = RCS(H.entry());
	+ for (auto Con : ResSine) {
	+ LOG_INFO_STREAM << " " << CategoryNames.at(Con.first) << " " << Con.second
	<< ",";
	}
	LOG_INFO_STREAM << '\n';
	}

	MyAgent(const AtomValue Kind, const rosa::id_t Id, const std::string &Name,
	MessagingSystem &S)
	: Agent(Kind, Id, Name, S, THISMEMBER(handler)), H(), C(5, 20, 1),
	A({{{(uint8_t)10, (uint8_t)14}, Categories::Normal},
	{{(uint8_t)15, (uint8_t)17}, Categories::Good},
	{{(uint8_t)18, (uint8_t)19}, Categories::Normal}},
	Categories::Bad),
	L({{{0, 2}, std::make_shared<LinearFunction<int, int>>(0, 1)},
	{{2, 4}, std::make_shared<LinearFunction<int, int>>(2, 0)},
	{{4, 6}, std::make_shared<LinearFunction<int, int>>(6, -1)}},
	0),
	RCL({{Categories::Bad,
	PartialFunction<float, float>(
	{
	{{0, 3},
	std::make_shared<LinearFunction<float, float>>(0,
	1.0 / 3)},
	{{3, 6},
	std::make_shared<LinearFunction<float, float>>(1, 0)},
	{{6, 9},
	std::make_shared<LinearFunction<float, float>>(
	3.0, -1.0 / 3)},
	},
	0)},
	{Categories::Normal,
	PartialFunction<float, float>(
	{
	{{6, 9},
	std::make_shared<LinearFunction<float, float>>(-2,
	1.0 / 3)},
	{{9, 12},
	std::make_shared<LinearFunction<float, float>>(1, 0)},
	{{12, 15},
	std::make_shared<LinearFunction<float, float>>(
	5, -1.0 / 3)},
	},
	0)},
	{Categories::Good,
	PartialFunction<float, float>(
	{
	{{12, 15},
	std::make_shared<LinearFunction<float, float>>(-4,
	1.0 / 3)},
	{{15, 18},
	std::make_shared<LinearFunction<float, float>>(1, 0)},
	{{18, 21},
	std::make_shared<LinearFunction<float, float>>(
	7, -1.0 / 3)},
	},
	0)}}),
	RCS({{Categories::Bad,
	PartialFunction<float, float>(
	{
	{{0, 3},
	std::make_shared<SineFunction<float, float>>(
	M_PI / 3, 0.5, -M_PI / 2, 0.5)},
	{{3, 6},
	std::make_shared<LinearFunction<float, float>>(1, 0)},
	{{6, 9},
	std::make_shared<SineFunction<float, float>>(
	M_PI / 3, 0.5, -M_PI / 2 + 3, 0.5)},
	},
	0)},
	{Categories::Normal,
	PartialFunction<float, float>(
	{
	{{6, 9},
	std::make_shared<SineFunction<float, float>>(
	M_PI / 3, 0.5, -M_PI / 2, 0.5)},
	{{9, 12},
	std::make_shared<LinearFunction<float, float>>(1, 0)},
	{{12, 15},
	std::make_shared<SineFunction<float, float>>(
	M_PI / 3, 0.5, -M_PI / 2 + 3, 0.5)},
	},
	0)},
	{Categories::Good,
	PartialFunction<float, float>(
	{
	{{12, 15},
	std::make_shared<SineFunction<float, float>>(
	M_PI / 3, 0.5, -M_PI / 2, 0.5)},
	{{15, 18},
	std::make_shared<LinearFunction<float, float>>(1, 0)},
	{{18, 21},
	std::make_shared<SineFunction<float, float>>(
	M_PI / 3, 0.5, -M_PI / 2 + 3, 0.5)},
	},
	0)}},
	true) {}
	};

	const std::map<MyAgent::Categories, const char *> MyAgent::CategoryNames{
	{Categories::Bad, "Bad"},
	{Categories::Normal, "Normal"},
	{Categories::Good, "Good"}};

	int main(void) {
	LOG_INFO_STREAM << library_string() << " -- " << Color::Red
	<< "agent-functionalities example" << Color::Default << '\n';

	std::unique_ptr<MessagingSystem> S = MessagingSystem::createSystem("Sys");
	MessagingSystem *SP = S.get();

	AgentHandle A = SystemTester::createMyAgent<MyAgent>(SP, "MyAgent");

	std::vector<uint8_t> Vs{0, 1, 2, 3, 4, 5, 6, 7, 9, 10,
	11, 13, 15, 14, 15, 16, 19, 20, 21};
	for (auto I = Vs.begin(); I != Vs.end(); ++I) {
	A.send<MyAgent::Tick, uint8_t>(MyAgent::Tick::Value, *I);
	}

	SystemTester::destroyMyAgent(SP, A);

	return 0;
	}
	diff --git a/include/rosa/agent/RangeConfidence.hpp b/include/rosa/agent/RangeConfidence.hpp
	index 0d8732e..60a53c1 100644
	--- a/include/rosa/agent/RangeConfidence.hpp
	+++ b/include/rosa/agent/RangeConfidence.hpp
	@@ -1,109 +1,108 @@
	//===-- rosa/agent/RangeConfidence.hpp --------------------------- C++ --===//
	//
	// The RoSA Framework
	//
	//===----------------------------------------------------------------------===//
	///
	/// \file rosa/agent/RangeConfidence.hpp
	///
	/// \author Benedikt Tutzer (benedikt.tutzer@tuwien.ac.at)
	///
	/// \date 2019
	///
	/// \brief Definition of RangeConfidence functionality.
	///
	//===----------------------------------------------------------------------===//

	#ifndef ROSA_AGENT_RANGECONFIDENCE_HPP
	#define ROSA_AGENT_RANGECONFIDENCE_HPP

	-#include "rosa/agent/Functionality.h"
	#include "rosa/agent/Abstraction.hpp"
	#include "rosa/agent/FunctionAbstractions.hpp"
	+#include "rosa/agent/Functionality.h"

	#include "rosa/support/debug.hpp"

	#include <algorithm>
	-#include <vector>
	#include <cmath>
	#include <memory>
	+#include <vector>

	namespace rosa {
	namespace agent {

	/// Evaluates a map of ID's to Abstractions at a given value and returns the
	/// results as a map from ID's to results of the corresponding Abstraction
	///
	/// \note This implementation is supposed to be used to abstract ranges of
	/// arithmetic types into maps whose values are of another arithmetic type,
	/// which is statically enforced.
	///
	/// \tparam D type to abstract from
	/// \tparam I type the type of the ID's
	/// \tparam R type of the range
	template <typename D, typename I, typename R>
	class RangeConfidence : protected Abstraction<D, std::map<I, R>>,
	- private std::map<I, PartialFunction<D, R>>{
	+ private std::map<I, PartialFunction<D, R>> {
	// Make sure the actual type arguments are matching our expectations.
	STATIC_ASSERT((std::is_arithmetic<D>::value), "abstracting not arithmetic");
	STATIC_ASSERT((std::is_arithmetic<R>::value),
	- "abstracting not to arithmetic");
	+ "abstracting not to arithmetic");

	private:
	/// Wether to include default results in the result-map or not
	bool IgnoreDefaults;

	public:
	/// Creates an instance by Initializing the underlying \c Abstraction and
	/// \c std::map.
	///
	/// \param Abstractions the Abstractions to be evaluated
	/// \param IgnoreDefaults wether to include default results in the result-map
	/// or not (defaults to false).
	RangeConfidence(const std::map<I, PartialFunction<D, R>> &Abstractions,
	- bool IgnoreDefaults = false)
	- : Abstraction<D, std::map<I, R>>({}),
	- std::map<I, PartialFunction<D, R>>(Abstractions),
	- IgnoreDefaults(IgnoreDefaults){
	- }
	+ bool IgnoreDefaults = false)
	+ : Abstraction<D, std::map<I, R>>({}), std::map<I, PartialFunction<D, R>>(
	+ Abstractions),
	+ IgnoreDefaults(IgnoreDefaults) {}

	/// Destroys \p this object.
	~RangeConfidence(void) = default;

	/// Checks wether all Abstractions evaluate to default at the given position
	///
	/// \param V the value at which to check if the functions falls back to it's
	/// default value.
	///
	/// \return true, if all Abstractions evaluate to default
	bool isDefaultAt(const D &V) const noexcept override {
	- for (auto const& p : ((std::map<I, PartialFunction<D, R>>)*this)){
	- if(!p.second.isDefaultAt(V))
	- return false;
	- }
	+ for (auto const &P : ((std::map<I, PartialFunction<D, R>>)*this)) {
	+ if (!P.second.isDefaultAt(V))
	+ return false;
	+ }
	return true;
	}

	/// All Abstractions stored in the underlying \c std::map are evaluated for
	/// the given value. Their results are stored in another map, with
	/// corresponding keys.
	/// If IgnoreDefaults is set, Abstractions that default for that value are not
	/// evaluated and inserted into the resulting \c std::map
	///
	/// \param V value to abstract
	///
	/// \return a \c std::map containing the results of the stored Abstractions,
	/// indexable by the key's the Abstractions are associated with
	std::map<I, R> operator()(const D &V) const noexcept override {
	- std::map<I, R> ret;
	- for (auto const& p : ((std::map<I, PartialFunction<D, R>>)*this)){
	- if(!IgnoreDefaults \|\| !p.second.isDefaultAt(V))
	- ret.insert(std::pair<I, R>(p.first, p.second(V)));
	+ std::map<I, R> Ret;
	+ for (auto const &P : ((std::map<I, PartialFunction<D, R>>)*this)) {
	+ if (!IgnoreDefaults \|\| !P.second.isDefaultAt(V))
	+ Ret.insert(std::pair<I, R>(P.first, P.second(V)));
	}
	- return ret;
	+ return Ret;
	}
	};
	} // End namespace agent
	} // End namespace rosa

	#endif // ROSA_AGENT_RANGECONFIDENCE_HPP
	diff --git a/include/rosa/core/SystemBase.hpp b/include/rosa/core/SystemBase.hpp
	index a5ca0d2..4b6720e 100644
	--- a/include/rosa/core/SystemBase.hpp
	+++ b/include/rosa/core/SystemBase.hpp
	@@ -1,138 +1,138 @@
	//===-- rosa/core/SystemBase.hpp ------------------------------ C++ --===//
	//
	// The RoSA Framework
	//
	//===----------------------------------------------------------------------===//
	///
	/// \file rosa/core/SystemBase.hpp
	///
	/// \author David Juhasz (david.juhasz@tuwien.ac.at)
	///
	/// \date 2017
	///
	/// \brief Base implementation of the \c rosa::System interface.
	///
	//===----------------------------------------------------------------------===//

	#ifndef ROSA_CORE_SYSTEMBASE_HPP
	#define ROSA_CORE_SYSTEMBASE_HPP

	#include "rosa/core/System.hpp"

	#include <atomic>

	namespace rosa {

	/// Base implementation of the \c rosa::System interface.
	///
	/// This implementation provides only equality checking and name for
	/// \c rosa::System, identifiers for \c rosa::Unit instances, and marking the
	/// \c rosa::System cleaned for destruction.
	///
	/// \note Actual implementations of \c rosa::System and derived interfaces are
	/// supposed to inherit from this implementation.
	class SystemBase : public System {
	protected:
	/// Creates an instance.
	///
	/// \note Protected constructor restrict instantiation for subclasses.
	///
	/// \param Name name of the new instance
	SystemBase(const std::string &Name) noexcept;

	public:
	/// Destroys \p this object.
	///
	/// \pre \p this object is marked cleaned:\code
	/// isSystemCleaned()
	/// \endcode
	~SystemBase(void);

	/// Tells whether \p this object is the same as \p Other.
	///
	/// Two \c rosa::System instances are considered equal if they share a common
	/// \c rosa::SystemBase::Name member field. That should do among various
	/// subclasses.
	///
	/// \param Other another \c rosa::System instance to compare to
	///
	/// \return whether \p this object and \p Other is the same
	bool operator==(const System &Other) const noexcept override;

	protected:
	/// The textual name of \p this object implementing \c rosa::System.
	const std::string Name;

	private:
	/// Number of \c rosa::Unit instances constructed by \p this object.
	///
	/// \note Should never be decremented!
	std::atomic<size_t> UnitCount;

	/// Indicates that \p this object has been cleaned and is ready for
	/// destruction.
	///
	/// The field is initialized as \c false and can be set by
	/// \c rosa::SystemBase::markCleaned.
	///
	/// \note Subclasses must set the flag upon destructing their instances, which
	/// indicates to the destructor of the base-class that all the managed
	/// resources has been properly released.
	std::atomic<bool> SystemIsCleaned;

	public:
	/// Tells the name of \p this object
	///
	/// \note The returned reference remains valid as long as \p this object is
	/// not destroyed.
	///
	/// \return reference to \c rosa::SystemBase::Name
	const std::string &name(void) const noexcept override;

	protected:
	/// Tells the next unique identifier to be used for a newly created
	/// \c rosa::Unit.
	///
	/// The functions takes the current value of the internal counter
	/// \c rosa::SystemBase::UnitCount and then increments it.
	///
	/// \note This is the only function modifying
	/// \c rosa::SystemBase::UnitCount.
	///
	/// \return \c rosa::id_t which is unique within the context of \p this
	/// object.
	id_t nextId(void) noexcept override;

	/// Tells if \p this object has been marked cleaned and is ready for
	/// destruction.
	///
	/// \return if \p this object is marked clean.
	bool isSystemCleaned(void) const noexcept override;

	/// Marks \p this object cleaned by setting
	/// \c rosa::SystemBase::SystemIsCleaned.
	///
	/// \note Can be called only once when the System does not have any live
	/// \c rosa::Unit instances.
	///
	/// \pre \p this object has not yet been marked as cleaned and it has no
	/// \c rosa::Unit instances registered:\code
	/// !isSystemCleaned() && empty()
	/// \endcode
	///
	/// \post \p this object is marked cleaned:\code
	/// isSystemCleaned()
	/// \endcode
	void markCleaned(void) noexcept override;

	/// Tells the number of \c rosa::Unit instances constructed in the context of
	/// \p this object so far, including those being already destroyed.
	///
	/// \return current value of \c rosa::SystemBase::UnitCount that is the number
	/// of \c rosa::Unit instances created so far
	size_t numberOfConstructedUnits(void) const noexcept override;
	};

	} // End namespace rosa

	-#endif // ROSA_LIB_CORE_SYSTEMBASE_HPP
	+#endif // ROSA_CORE_SYSTEMBASE_HPP
	diff --git a/include/rosa/deluxe/DeluxeSystem.hpp b/include/rosa/deluxe/DeluxeSystem.hpp
	index 4388a4e..1be3bbd 100755
	--- a/include/rosa/deluxe/DeluxeSystem.hpp
	+++ b/include/rosa/deluxe/DeluxeSystem.hpp
	@@ -1,211 +1,210 @@
	//===-- rosa/deluxe/DeluxeSystem.hpp ----------------------------- C++ --===//
	//
	// The RoSA Framework
	//
	//===----------------------------------------------------------------------===//
	///
	/// \file rosa/deluxe/DeluxeSystem.hpp
	///
	/// \author David Juhasz (david.juhasz@tuwien.ac.at)
	///
	/// \date 2017-2019
	///
	/// \brief Specialization of \c rosa::MessagingSystem for the *deluxe
	/// interface*.
	///
	/// \see \c rosa::deluxe::DeluxeContext
	///
	//===----------------------------------------------------------------------===//

	#ifndef ROSA_DELUXE_DELUXESYSTEM_HPP
	#define ROSA_DELUXE_DELUXESYSTEM_HPP

	#include "rosa/core/MessagingSystem.hpp"

	#include "rosa/deluxe/DeluxeAgent.hpp"
	#include "rosa/deluxe/DeluxeSensor.hpp"

	namespace rosa {
	namespace deluxe {

	/// Implements and extends the \c rosa::MessagingSystem interface to be
	/// used by \c rosa::deluxe::DeluxeContext.
	///
	/// The class is a specialization of \c rosa::MessagingSystem, where objects
	/// of two specialized subtypes of \c rosa::Agent, \c rosa::deluxe::DeluxeSensor
	/// and \c rosa::deluxe::DeluxeAgent, constitute a system. The class extends the
	/// \c rosa::MessagingSystem interface with features required to implement the
	/// deluxe interface.
	///
	/// \see rosa::deluxe::DeluxeContext
	class DeluxeSystem : public MessagingSystem {

	friend class DeluxeContext;

	public:
	/// Returns an object implementing the \c rosa::deluxe::DeluxeSystem
	/// interface.
	///
	/// \param Name name of the new instance
	///
	/// \return \c std::unique_ptr for the new instance of
	/// \c rosa::DeluxeSystem
	static std::unique_ptr<DeluxeSystem>
	createSystem(const std::string &Name) noexcept;

	protected:
	/// Creates a new instance.
	///
	/// \note Protected constructor restricts instantiation for subclasses.
	DeluxeSystem(void) noexcept = default;

	public:
	/// Creates a \c rosa::deluxe::DeluxeSensor instance owned by \p this object
	/// and returns a \p rosa::AgentHandle for it.
	///
	/// \tparam T type of data the new \c rosa::deluxe::DeluxeSensor operates on
	///
	/// \param Name name of the new \c rosa::deluxe::DeluxeSensor
	/// \param F function to generate the next value with during normal operation
	///
	/// \return \c rosa::AgentHandle for new \c rosa::deluxe::DeluxeSensor
	template <typename T>
	AgentHandle createSensor(const std::string &Name,
	DeluxeSensor::D<T> &&F) noexcept;

	/// Creates a \c rosa::deluxe::DeluxeAgent instance owned by \p this object
	/// and returns a \c rosa::AgentHandle for it.
	///
	/// \tparam T type of data the new \c rosa::deluxe::DeluxeAgent outputs
	/// \tparam As types of inputs the new \c rosa::deluxe::DeluxeAgent takes
	///
	/// \param Name name of the new \c rosa::deluxe::DeluxeAgent
	/// \param F function for the new \c rosa::deluxe::DeluxeAgent to process
	/// input values and generate output with
	///
	/// \return \c rosa::AgentHandle for new \c rosa::deluxe::DeluxeAgent
	template <typename T, typename... As>
	AgentHandle createAgent(const std::string &Name,
	DeluxeAgent::D<T, As...> &&F) noexcept;

	protected:
	/// Tells whether a \c rosa::AgentHandle refers to a
	/// \c rosa::deluxe::DeluxeSensor owned by \p this object.
	///
	/// \param H \c rosa::AgentHandle to check
	///
	/// \return whether \p H refers to a \c rosa::deluxe::DeluxeSensor owned by
	/// \p this object
	virtual bool isDeluxeSensor(const AgentHandle &H) const noexcept = 0;

	/// Extracts a const qualified \c rosa::deluxe::DeluxeSensor reference from a
	/// const qualified \c rosa::AgentHandle if possible.
	///
	/// The function returns a \c rosa::Optional object containing a const
	/// qualified reference to a \c rosa::deluxe::DeluxeSensor object extracted
	/// from a const qualified \c rosa::AgentHandle instance if the referred
	/// object is of type \c rosa::deluxeDeluxeSensor and owned by \p this object.
	/// The returned \c rosa::Optional object is empty otherwise.
	///
	/// \see rosa::deluxe::DeluxeSystem::isDeluxeSensor
	///
	/// \param H \c rosa::AgentHandle to extract a \c rosa::deluxe::DeluxeSensor
	/// from
	///
	/// \return const qualified reference to \c rosa::deluxe::DeluxeSensor if
	/// \p H refers to an object which is of that type and is owned by \p this
	/// object
	Optional<const DeluxeSensor &> getDeluxeSensor(const AgentHandle &H) const
	noexcept;

	/// Extracts a \c rosa::deluxe::DeluxeSensor reference from a
	/// \c rosa::AgentHandle if possible.
	///
	/// The function returns a \c rosa::Optional object containing a reference to
	/// a \c rosa::deluxe::DeluxeSensor object extracted from a
	/// \c rosa::AgentHandle instance if the referred object is of type
	/// \c rosa::deluxeDeluxeSensor and owned by \p this object. The returned
	/// \c rosa::Optional object is empty otherwise.
	///
	/// \see rosa::deluxe::DeluxeSystem::isDeluxeSensor
	///
	/// \param H \c rosa::AgentHandle to extract a \c rosa::deluxe::DeluxeSensor
	/// from
	///
	/// \return reference to \c rosa::deluxe::DeluxeSensor if \p H refers to an
	/// object which is of that type and is owned by \p this object
	Optional<DeluxeSensor &> getDeluxeSensor(AgentHandle &H) const noexcept;

	/// Tells whether a \c rosa::AgentHandle refers to a
	/// \c rosa::deluxe::DeluxeAgent owned by \p this object.
	///
	/// \param H \c rosa::AgentHandle to check
	///
	/// \return whether \p H refers to a \c rosa::deluxe::DeluxeAgent owned by
	/// \p this object
	virtual bool isDeluxeAgent(const AgentHandle &H) const noexcept = 0;

	/// Extracts a const qualified \c rosa::deluxe::DeluxeAgent reference from a
	/// const qualified \c rosa::AgentHandle if possible.
	///
	/// The function returns a \c rosa::Optional object containing a const
	/// qualified reference to a \c rosa::deluxe::DeluxeAgent object extracted
	/// from a const qualified \c rosa::AgentHandle instance if the referred
	/// object is of type \c rosa::deluxeDeluxeAgent and owned by \p this object.
	/// The returned \c rosa::Optional object is empty otherwise.
	///
	/// \see rosa::deluxe::DeluxeSystem::isDeluxeAgent
	///
	/// \param H \c rosa::AgentHandle to extract a \c rosa::deluxe::DeluxeAgent
	/// from
	///
	/// \return const qualified reference to \c rosa::deluxe::DeluxeAgent if \p H
	/// refers to an object which is of that type and is owned by \p this object
	Optional<const DeluxeAgent &> getDeluxeAgent(const AgentHandle &H) const
	noexcept;

	/// Extracts a \c rosa::deluxe::DeluxeAgent reference from a
	/// \c rosa::AgentHandle if possible.
	///
	/// The function returns a \c rosa::Optional object containing a reference to
	/// a \c rosa::deluxe::DeluxeAgent object extracted from a
	/// \c rosa::AgentHandle instance if the referred object is of type
	/// \c rosa::deluxeDeluxeAgent and owned by \p this object. The returned
	/// \c rosa::Optional object is empty otherwise.
	///
	/// \see rosa::deluxe::DeluxeSystem::isDeluxeAgent
	///
	/// \param H \c rosa::AgentHandle to extract a \c rosa::deluxe::DeluxeAgent
	/// from
	///
	/// \return reference to \c rosa::deluxe::DeluxeAgent if \p H refers to an
	/// object which is of that type and is owned by \p this object
	Optional<DeluxeAgent &> getDeluxeAgent(AgentHandle &H) const noexcept;
	};

	template <typename T>
	AgentHandle DeluxeSystem::createSensor(const std::string &Name,
	DeluxeSensor::D<T> &&F) noexcept {
	Agent &DS = createUnit<DeluxeSensor, MessagingSystem>(
	[&](const id_t Id, MessagingSystem &S) {
	return new DeluxeSensor(atoms::SensorKind, Id, Name, S, std::move(F));
	});
	return {DS};
	}

	template <typename T, typename... As>
	-AgentHandle
	-DeluxeSystem::createAgent(const std::string &Name,
	- DeluxeAgent::D<T, As...> &&F) noexcept {
	-
	+AgentHandle DeluxeSystem::createAgent(const std::string &Name,
	+ DeluxeAgent::D<T, As...> &&F) noexcept {
	+
	Agent &DA = createUnit<DeluxeAgent, DeluxeSystem>(
	[&](const id_t Id, DeluxeSystem &S) {
	return new DeluxeAgent(atoms::AgentKind, Id, Name, S, std::move(F));
	});
	return {DA};
	}

	} // End namespace deluxe
	} // End namespace rosa

	-#endif // ROSA_LIB_DELUXE_DELUXESYSTEM_HPP
	+#endif // ROSA_DELUXE_DELUXESYSTEM_HPP
	diff --git a/lib/core/MessagingSystemImpl.hpp b/lib/core/MessagingSystemImpl.hpp
	index 485711a..89a366b 100644
	--- a/lib/core/MessagingSystemImpl.hpp
	+++ b/lib/core/MessagingSystemImpl.hpp
	@@ -1,109 +1,110 @@
	//===-- core/MessagingSystemImpl.hpp ----------------------------- C++ --===//
	//
	// The RoSA Framework
	//
	//===----------------------------------------------------------------------===//
	///
	/// \file core/MessagingSystemImpl.hpp
	///
	/// \author David Juhasz (david.juhasz@tuwien.ac.at)
	///
	/// \date 2017
	///
	/// \brief Declaration of a basic implementation of the \c rosa::MessagingSystem
	/// interface.
	///
	//===----------------------------------------------------------------------===//

	#ifndef ROSA_LIB_CORE_MESSAGINGSYSTEMIMPL_HPP
	#define ROSA_LIB_CORE_MESSAGINGSYSTEMIMPL_HPP

	#include "SystemImpl.hpp"

	#include "rosa/core/MessagingSystem.hpp"

	namespace rosa {

	/// Implements \c rosa::MessagingSystem by extending \c rosa::SystemImpl with
	/// adding a simple implementation of sending messages: directly invoking
	/// \c rosa::Agent instances with given \c rosa::Message objects.
	///
	/// \note Keep in mind that sending a \c rosa::Message object with this
	/// implementation translates into a direct function call.
	class MessagingSystemImpl : public MessagingSystem, public SystemImpl {
	/// Alies for the base-class \c rosa::SystemImpl.
	using Base = SystemImpl;

	public:
	/// Creates an instance.
	///
	/// \param Name name of the new instance
	MessagingSystemImpl(const std::string &Name) noexcept;

	- /// \defgroup MessagingSystemImplCallForwarding Call forwardings of rosa::MessagingSystemImpl
	+ /// \defgroup MessagingSystemImplCallForwarding Call forwardings of
	+ /// rosa::MessagingSystemImpl
	///
	/// \c rosa::MessagingSystemImpl call forwardings
	///
	/// \note Simply forwarding calls to implementations provided by
	/// \c rosa::MessagingSystem::Base for the \c rosa::System interface.
	///
	/// \todo How could we use the inherited implementations in a simpler way?
	///@{

	bool operator==(const System &Other) const noexcept override {
	return Base::operator==(Other);
	}

	protected:
	id_t nextId(void) noexcept override { return Base::nextId(); }

	bool isSystemCleaned(void) const noexcept override {
	return Base::isSystemCleaned();
	}

	void markCleaned(void) noexcept override { Base::markCleaned(); }

	void registerUnit(Unit &U) noexcept override { Base::registerUnit(U); }

	void destroyUnit(Unit &U) noexcept override { Base::destroyUnit(U); }

	bool isUnitRegistered(const Unit &U) const noexcept override {
	return Base::isUnitRegistered(U);
	}

	public:
	const std::string &name(void) const noexcept override { return Base::name(); }

	size_t numberOfConstructedUnits(void) const noexcept override {
	return Base::numberOfConstructedUnits();
	}

	size_t numberOfLiveUnits(void) const noexcept override {
	return Base::numberOfLiveUnits();
	}

	bool empty(void) const noexcept override { return Base::empty(); }

	///@}

	/// Sends a \c rosa::message_t instance to the \c rosa::Agent instance
	/// referred by a \c rosa::AgentHandle -- by directly invoking the
	/// \c rosa::Agent instance with the \c rosa::Message object.
	///
	/// \note If the given \c rosa::Message object cannot be handled by the
	/// referred \c rosa::Agent instance, the \c rosa::Message object is simply
	/// ignored.
	///
	/// \param H refers to the \c rosa::Agent instance to send to
	/// \param M message to send
	///
	/// \pre The referred \c rosa::Agent instance is owned by \p this object and
	/// also registered: \code
	/// &unwrapSystem(H) == this && isUnitRegistered(unwrapAgent(H))
	/// \endcode
	void send(const AgentHandle &H, message_t &&M) noexcept override;
	};

	} // End namespace rosa

	#endif // ROSA_LIB_CORE_MESSAGINGSYSTEMIMPL_HPP

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