#include <random>
#include <cassert>
template <class UIntType, UIntType Min, UIntType Max>
class rand1
{
public:
typedef UIntType result_type;
private:
result_type x_;
static_assert(Min < Max, "rand1 invalid parameters");
public:
static const result_type _Min = Min;
static const result_type _Max = Max;
static const result_type min() {return Min;}
static const result_type max() {return Max;}
explicit rand1(result_type sd = Min) : x_(sd)
{
if (x_ > Max)
x_ = Max;
}
result_type operator()()
{
result_type r = x_;
if (x_ < Max)
++x_;
else
x_ = Min;
return r;
}
};
void
test1()
{
typedef std::knuth_b E;
E e;
assert(e() == 152607844u);
}
void
test2()
{
typedef rand1<unsigned long long, 0, 0xFFFFFFFFFFFFFFFFull> E0;
typedef std::shuffle_order_engine<E0, 101> E;
E e;
e.discard(400);
assert(e() == 501);
}
void
test3()
{
typedef rand1<unsigned long long, 0, 0xFFFFFFFFFFFFFFFFull> E0;
typedef std::shuffle_order_engine<E0, 100> E;
E e;
e.discard(400);
assert(e() == 500);
}
int main()
{
test1();
test2();
test3();
}