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pub struct Xorshift128Plus {
seeds: [u64; 2],
}
impl Xorshift128Plus {
pub fn new(seeds: [u64; 2]) -> Self {
Self { seeds }
}
pub fn next(&mut self) -> u64 {
let [mut x, y] = self.seeds;
x ^= x << 23;
x ^= x >> 18;
x ^= y ^ (y >> 5);
self.seeds = [y, x];
x + y
}
}
impl Default for Xorshift128Plus {
fn default() -> Self {
Self::new([1, 1])
}
}
#[cfg(test)]
mod tests {
#[test]
fn test() {}
}