for-of.js

for (VAR of ITERABLE)
  STATEMENT

----

var $iterator = (ITERABLE)[Symbol.iterator]();
var $skipReturn;
try {
    while (true) {
        $skipReturn = true;
        var $result = $iterator.next();
        $skipReturn = false;
        $ObjectRequired($result);
        if ($result.done)
            break;
        VAR = $result.value;
        STATEMENT
    }
} finally {
    if (!$skipReturn && $iterator.return !== undefined) {
        $result = $iterator.return();
        $ObjectRequired($result);
    }
}