dl_array_enum.h

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#pragma once
 
#include <cassert>
 
namespace dl
{
template<typename V, auto N>
class ArrayEnum
{
public:
    using E = decltype(N);
    V& operator[](E e)
    {
#ifndef NDEBUG
        assert(CheckRange(e));
#endif
        return _data[(size_t)e];
    }
 
    V& operator[](size_t index)
    {
        return operator[](E(index));
    }

    bool CheckRange(E e)
    {
        return (size_t)e < (size_t)N;
    }
 
    size_t size() { return (size_t)N; }
 
    V* begin() { return _data; }
    V* end() { return _data + (size_t)N; }
 
private:
    V _data[(size_t)N];
};
 
}