WELLEngine

import std.algorithm;
import std.range;
import std.stdio;

WELLEngine!"512a" rng;

static assert(isUniformRNG!(typeof(rng)));
static assert(isSeedable!(typeof(rng)));

rng.seed(100);

// http://sc.yutopp.net/entries/5335700643f75e10dc0014c9
assert(equal(rng.save.take(8),
  [ 2230636158,
    1842930638,
    155680193,
    1855495099,
    2311897807,
    3102313483,
    3970788677,
    3720522367,]));

// save test
auto saved1 = rng.save;
auto saved2 = rng.save;

rng.popFrontN(100);
assert(equal(saved1.save.take(64), saved2.save.take(64)));

saved1.popFrontN(100);
assert(equal(rng.save.take(64), saved1.save.take(64)));

// http://sc.yutopp.net/entries/53361aca43f75e10dc0014fb
assert(rng.front == 1947823519);
rng.popFront();
rng.popFrontN(10000);
assert(rng.front == 2831551372);