public function __construct(ClassLoader $loader, Engine $engine = null)
{
if (!$engine) {
$engine = new Engine();
}
$this->engine = $engine;
$this->add(null, $loader->getFallbackDirs());
$this->addPsr4(null, $loader->getFallbackDirsPsr4());
foreach ($loader->getPrefixes() as $prefix => $path) {
$this->add($prefix, $path);
}
foreach ($loader->getPrefixesPsr4() as $prefix => $path) {
$this->addPsr4($prefix, $path);
}
$this->setUseIncludePath($loader->getUseIncludePath());
}
