<?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.

*/

/**

* Implement this interface to define a configuration to generate code.

* The config will need to be passed to some of the Codegen constructors,

* which will usually be wrapped in the codegen_* functions.

*/

interface IHackCodegenConfig {

/**

* Return an instance of the config, which will usually be a singleton.

*/

public static function getInstance(): this;

/**

* If a non-null value is returned, those lines will be added in the file

* header. It can be used for example to write a copyright notice.

*/

public function getFileHeader(): ?Vector<string>;

/**

* How many spaces will each indentation be.

*/

public function getSpacesPerIndentation(): int;

/**

* What's the max length of each line of code. Some methods will wrap code

* longer than this value.

*/

public function getMaxLineLength(): int;

/**

* Return the root directory for saving the generated files when relative

* paths are used.

*/

public function getRootDir(): string;

}