<?hh // strict

/**

* Copyright (c) 2015-present, Facebook, Inc.

* All rights reserved.

*

* This source code is licensed under the BSD-style license found in the

* LICENSE file in the root directory of this source tree. An additional grant

* of patent rights can be found in the PATENTS file in the same directory.

*/

namespace Facebook\HackCodegen;

class StrBuffer {

private string $str = '';

private bool $detached = false;

public function append(mixed $value): void {

$this->str .= (string) $value;

}

public function detach(): string {

invariant(!$this->detached, 'The buffer has been already detached');

$this->detached = true;

return $this->str;

}

}