/usr/include/BALL/CONCEPT/visitor.h is in libball1.4-dev 1.4.3~beta1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// vi: set ts=2:
//
#ifndef BALL_CONCEPT_VISITOR_H
#define BALL_CONCEPT_VISITOR_H
#ifndef BALL_COMMON_H
# include <BALL/common.h>
#endif
namespace BALL
{
/** Generic Visitor Class.
This class implements the visitor design pattern.
\ingroup ConceptsMiscellaneous
*/
//@{
template <typename Host>
class Visitor
{
public:
/** @name Constructors and destructors
*/
//@{
/** Default constructor
*/
Visitor()
;
/** Copy constructor
*/
Visitor(const Visitor& visitor)
;
/** Destructor
*/
virtual ~Visitor()
;
//@}
/** Visit method.
The visit method is an abstract method defining an
interface between the visitor object and its host.
*/
virtual void visit(Host &) = 0;
virtual void dummy();
};
//@}
template <typename T>
void Visitor<T>::dummy(){}
template <typename T>
BALL_INLINE
Visitor<T>::Visitor()
{
}
template <typename Host>
BALL_INLINE
Visitor<Host>::Visitor(const Visitor<Host>& /* visitor */)
{
}
template <typename T>
Visitor<T>::~Visitor()
{
}
}
#endif // BALL_CONCEPT_VISITOR_H
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