RNG.h

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#pragma once
#include <cstdint>
#include <limits>
 
class RNG {
public:
    using result_type = std::uint32_t;
 
    RNG() = default;
    virtual ~RNG() = default;
 
    // Return a long-words word of random bits
    virtual result_type asLong() = 0;
    virtual void reset() = 0;
 
    // Return random bits converted to a double
    virtual double asDouble() = 0;
 
    static constexpr result_type min() {
        return std::numeric_limits<result_type>::min();
    }
    static constexpr result_type max() {
        return std::numeric_limits<result_type>::max();
    }
    result_type operator()() {
        return asLong();
    }
};