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Represent an operation to be performed on the components of an object structure.
Represent an operation to be performed on the components of an object structure. Visitor lets you define a new operation without changing the classes of the components on which it operates.
Visitor( VisitorCref )
virtual ~Visitor( void )
VisitorRef operator=( VisitorCref )
bool operator==( VisitorCref ) const
bool operator!=( VisitorCref ) const