public static function shrinkLoop(RoseTree $tree)
{
$nodes = FP::realize($tree->getChildren());
$smallest = $tree->getRoot();
$visited = 0;
$depth = 0;
for ($i = 0; $i < count($nodes); ++$i) {
$head = $nodes[$i];
$root = $head->getRoot();
$result = $root['result'];
if (!$result || $result instanceof \Exception) {
$children = FP::realize($head->getChildren());
if (empty($children)) {
$smallest = $root;
$visited++;
} else {
$nodes = $children;
$i = -1;
$smallest = $root;
$visited++;
$depth++;
}
} else {
$visited++;
}
}
return self::smallestShrink($visited, $depth, $smallest);
}
function testRewindBeforeGeneratorIsConsumed()
{
$range = new RewindableIterator(FP::range(0, 3));
$range->rewind();
$this->assertTrue($range->valid());
$this->assertEquals(0, $range->current());
$range->next();
$this->assertTrue($range->valid());
$this->assertEquals(1, $range->current());
$range->rewind();
$this->assertTrue($range->valid());
$this->assertEquals(0, $range->current());
$range->next();
$this->assertTrue($range->valid());
$this->assertEquals(1, $range->current());
$range->next();
$this->assertTrue($range->valid());
$this->assertEquals(2, $range->current());
$range->next();
$this->assertFalse($range->valid());
$range->rewind();
$this->assertTrue($range->valid());
$this->assertEquals(0, $range->current());
}