array_allocator.h

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#ifndef _ARRAY_ALLOCATOR_H_
#define _ARRAY_ALLOCATOR_H_

template <class T,size_t size> class array_allocator
{
private:
 T array[size];
public:
 typedef T value_type;
 typedef size_t size_type;
 typedef ptrdiff_t difference_type;
 
 typedef T* pointer;
 typedef const T* const_pointer;

 typedef T& reference;
 typedef const T& const_reference;

 pointer address(reference r) const { return &r; }
 const_pointer address(const_reference r) const { return &r; }
 
 array_allocator() throw(){}
 template <class U,size_t sz> array_allocator(const array_allocator<U,sz>& ) throw() {}
 ~array_allocator() throw(){}

 pointer allocate(size_type n, const void* = 0)
  {
   return array;
  }
 void deallocate(pointer p, size_type)
  {
  }

 //Use placement new to engage the constructor
 void construct(pointer p, const T& val) { new((void*)p) T(val); }
 void destroy(pointer p){ ((T*)p)->~T(); }

 size_type max_size() const throw() {return size;}
 template<class U> struct rebind { typedef array_allocator<U,size> other; };
};

template<class T,size_t size> struct array_vector : std::vector<T, array_allocator<T,size> >
{
};

#if defined(__INTEL_COMPILER) || defined(__GNUC__) || (_MSC_VER>=1300)
  //template<class T,size_t a> struct allocator_traits<array_allocator<T,a> > {enum {is_static=true};};
#endif

#endif