SystemVisitor< T > Class Template Reference

Detailed Description

template<typename T>
class drake::systems::SystemVisitor< T >

Provides a "Visitor Pattern" for System and Diagram.

Rather than adding more virtual methods to the System base class, or performing a dynamic_cast to test if a System is a Diagram, you may use the visitor pattern enabled by this class, e.g.:

template <typename T>
class MySystemVisitor : public SystemVisitor {
  ...
}

MySystemVisitor<T> visitor;
system.Accept(visitor);

will call the correct Visit overload.

Note

This method does not recurse through the subsystems of a Diagram, but that is easy to do: just call Diagram::GetSystems() in your visitor and then call Accept on the subsystems.

Template Parameters

T	The scalar type, which must be one of the default scalars.

#include <drake/systems/framework/system_visitor.h>

Public Member Functions
virtual	~SystemVisitor ()=default
virtual void	VisitSystem (const System< T > &system)=0
	This method will be called by System<T>::accept() if the System is not a Diagram<T>. More...
virtual void	VisitDiagram (const Diagram< T > &diagram)=0
	This method will be called by System<T>::accept() if the System is a Diagram<T>. More...
Does not allow copy, move, or assignment
	SystemVisitor (const SystemVisitor &)=delete
SystemVisitor &	operator= (const SystemVisitor &)=delete
	SystemVisitor (SystemVisitor &&)=delete
SystemVisitor &	operator= (SystemVisitor &&)=delete

Protected Member Functions
	SystemVisitor ()=default

Constructor & Destructor Documentation

SystemVisitor() [1/3]

SystemVisitor ( const SystemVisitor< T > &  )

delete

SystemVisitor() [2/3]

SystemVisitor ( SystemVisitor< T > &&  )

delete

~SystemVisitor()

virtual ~SystemVisitor ( )

virtualdefault

SystemVisitor() [3/3]

SystemVisitor ( )

protecteddefault

Member Function Documentation

operator=() [1/2]

SystemVisitor& operator= ( const SystemVisitor< T > &  )

delete

operator=() [2/2]

SystemVisitor& operator= ( SystemVisitor< T > &&  )

delete

VisitDiagram()

virtual void VisitDiagram ( const Diagram< T > &  diagram )

pure virtual

This method will be called by System<T>::accept() if the System is a Diagram<T>.

VisitSystem()

virtual void VisitSystem ( const System< T > &  system )

pure virtual

This method will be called by System<T>::accept() if the System is not a Diagram<T>.

---

The documentation for this class was generated from the following file:

• drake/systems/framework/system_visitor.h