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#pragma once
#include <Visitor.h>
namespace Types {
template <typename Visitor, typename BaseVisitable>
class CVisitorTopToBottom
{
public:
virtual ~CVisitorTopToBottom() {}
void operator()( BaseVisitable * );
};
template <typename Visitor, typename BaseVisitable>
class CVisitorBottomToTop
{
public:
virtual ~CVisitorBottomToTop() {}
void operator()( BaseVisitable * );
};
template <typename Visitor, typename BaseVisitable>
class CVisitorLeftToRight
{
public:
virtual ~CVisitorLeftToRight() {}
void operator()( BaseVisitable * );
};
template <typename Visitor, typename BaseVisitable>
void
CVisitorTopToBottom<Visitor, BaseVisitable>::operator()( BaseVisitable *visitable )
{
// Visit this
visitable->Accept( *dynamic_cast<Visitor*>( this ) );
// Now visit all the children
if ( visitable->empty() )
return;
BaseVisitable::shallow_iterator iter = visitable->begin_shallow();
for ( ; iter != visitable->end_shallow(); ++iter )
(*this)(*iter);
}
template <typename Visitor, typename BaseVisitable>
void
CVisitorBottomToTop<Visitor, BaseVisitable>::operator()( BaseVisitable *visitable )
{
// Visit all the children
if ( !visitable->empty() )
{
BaseVisitable::shallow_iterator iter = visitable->begin_shallow();
for ( ; iter != visitable->end_shallow(); ++iter )
(*this)(*iter);
}
// Now visit this
visitable->Accept( *dynamic_cast<Visitor*>( this ) );
}
template <typename Visitor, typename BaseVisitable>
void
CVisitorLeftToRight<Visitor, BaseVisitable>::operator()( BaseVisitable *visitable )
{
// Visit the left hand child
if ( !visitable->empty() )
(*this)(*visitable->begin_shallow());
// Visit this
visitable->Accept( *dynamic_cast<Visitor*>( this ) );
// Visit the right hand child(ren)
if ( visitable->size() > 1 )
{
BaseVisitable::shallow_iterator iter = ++visitable->begin_shallow();
for ( ; iter != visitable->end_shallow(); ++iter )
(*this)(*iter);
}
}
}
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I started programming on 8 bit machines as a teenager, writing my first compiled programming language before I was 16. I went on to study Engineering and Computer Science at Oxford University, getting a first and the University Prize for the best results in Computer Science. Since then I have worked in a variety of roles, involving systems management and development management on a wide variety of platforms. Now I manage a software development company producing CAD software for Windows using C++.
My 3 favourite reference books are: Design Patterns, Gamma et al; The C++ Standard Library, Josuttis; and Computer Graphics, Foley et al.
Outside computers, I am also the drummer in a band, The Unbelievers and we have just released our first album. I am a pretty good juggler and close up magician, and in my more insane past, I have cycled from Spain to Eastern Turkey, and cycled across the Namib desert.
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