EE containers & C++11 ranged for loops

miro@3dea · 10-18-2012 09:40 AM

If anyone miss C++11 functionality with EE containers, here is a little helper class that can be used:

Code:

template <typename T, template <typename> class Container>

struct ArrayIter

{

public:

  ArrayIter(Ptr array, Int idx) :

     _array(array),

     _idx(idx)

  {}

  bool operator!=(const ArrayIter & right) const { return _idx != right._idx; }

  const ArrayIter<T, Container> & operator++() { ++_idx; return *this; }

  T & operator*() const;

protected:

  Ptr _array;

  Int  _idx;

};

template <typename T, template <typename> class Ancestor>

struct Array : public Ancestor<T>

{

  typedef ArrayIter<T, Ancestor> Iterator;

  const Iterator begin() const { return Iterator(this, 0); }

        Iterator begin()       { return Iterator(this, 0); }

  const Iterator end()   const { return Iterator(this, elms()); }

        Iterator end()         { return Iterator(this, elms()); }

};

template <typename T, template <typename> class Container>

T & ArrayIter<T, Container>::operator*() const

{

  return static_cast<Container<T> *>(_array)->operator[](_idx);

}

so you can use it like this:

Code:

typedef Array<Player, EE::Game::ObjMemx> ObjPlayers;

ObjPlayers players;

for (auto & player : players) player.drawPrepare();

C++11 is supported (not yet fully though) with VS2012. We are using it for a couple of months already for developing EE and I strongly encourage you to do so if you would like it too..

Zervox · 10-18-2012 10:55 AM

Great snippet. : )

yvanvds · 10-19-2012 11:52 PM

I vote +1

EE containers & C++11 ranged for loops
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