/**
* turns a list of generators into a generator of a list
*
* @param Generator[]|\Iterator $ms
* @return Generator
*/
private static function sequence($ms)
{
return FP::reduce(function (Generator $acc, Generator $elem) {
return $acc->bindGen(function ($xs) use($elem) {
return $elem->bindGen(function ($y) use($xs) {
return self::pureGen(FP::push($xs, $y));
});
});
}, $ms, self::pureGen([]));
}
