#ifndef CL_COUNTER_HPP
#define CL_COUNTER_HPP

template<int C>
struct _cc : _cc<C-1> {};
template<>
struct _cc<0> {};

typedef _cc<32> _cm;

template<typename T>
struct _ct
{
    static _ct<T> f();
    typedef T t;
};

template<int Size>
struct _cs { char _[Size]; };

template<typename d>
_cs<1>& _cf(_ct<d>&, _cc<0>&, _cc<0>&);

template<typename d, int N>
struct _cn
{
    static const int b = N == 0 ? 0x1 : _cn<d,N-1>::b + (N >> _cn<d,N-1>::b);
    static const int l = N >> b/2;
    static const int r = N ^ (l << b/2);
    friend _cs<N+1>& _cf(_ct<d>&, _cc<l>&, _cc<r>&);
    static const int v = N-1;
};

#define CL_COUNTER_NEXT(id) \
(::_cn<id, sizeof(::_cf(::_ct<id >(), ::_cm(), ::_cm()))>::v)

#define CL_COUNTER_GET(id) \
(sizeof(::_cf(::_ct<id >(), ::_cm(), ::_cm()))-1)

#endif