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/**
* InvalidIterator.h
*
* Iterator class that is used for value objects that are not even
* iteratable.
*
* @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
* @copyright 2014 Copernica BV
*/
/**
* Set up namespace
*/
namespace Php {
/**
* Class definition
*/
class InvalidIterator : public IteratorImpl
{
public:
/**
* Clone the object
* @param tsrm_ls
* @return IteratorImpl
*/
virtual IteratorImpl *clone()
{
// create a new instance
return new InvalidIterator(*this);
}
/**
* Increment position (pre-increment)
* @param tsrm_ls
* @return bool
*/
virtual bool increment() override
{
return false;
}
/**
* Decrement position (pre-decrement)
* @return bool
*/
virtual bool decrement() override
{
return false;
}
/**
* Compare with other iterator
* @param that
* @return bool
*/
virtual bool equals(const IteratorImpl *that) const override
{
// the other iterator is also an invalid-iterator, and all invalid
// iterators are equal
return true;
}
/**
* Derefecence, this returns a std::pair with the current key and value
* @return std::pair
*/
virtual const std::pair<Value,Value> ¤t() const override
{
// this method is never called, when it is, we create a static instance
static std::pair<Value,Value> result;
// return it
return result;
}
};
/**
* End namespace
*/
}
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