/*

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

* All rights reserved.

*

* This source code is licensed under the MIT license found in the

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

*

*/

namespace Facebook\HackCodegen;

use namespace HH\Lib\Str;

/**

* Generate code for a class constant.

*

* @see IHackCodegenFactory::codegenConstant

*/

final class CodegenClassConstant extends CodegenConstantish {

use HackBuilderRenderer;

public function __construct(

protected IHackCodegenConfig $config,

string $name,

) {

parent::__construct($config, $name);

}

private bool $isAbstract = false;

public function isAbstract(): bool {

return $this->isAbstract;

}

public function setIsAbstract(bool $value): this {

$this->isAbstract = $value;

return $this;

}

private ?string $type;

public function getType(): ?string {

return $this->type;

}

/** @selfdocumenting */

public function setType(string $type): this {

$this->type = $type;

return $this;

}

/** Set the type of the constant using a %-placeholder format string */

public function setTypef(

Str\SprintfFormatString $format,

mixed ...$args

): this {

return $this->setType(\vsprintf($format, $args));

}

<<__Override>>

public function appendToBuilder(HackBuilder $builder): HackBuilder {

$value = $this->getValue();

$abstract = $this->isAbstract();

invariant(

($value !== null) !== $abstract,

'class constants must either be abstract or have a value',

);

$type = $this->getType();

return $builder

->addDocBlock($this->getDocBlock())

->ensureNewLine()

->addIf($abstract, 'abstract ')

->add('const ')

->addIf($type !== null, ($type ?? '').' ')

->add($this->getName())

->addIf($value !== null, ' = '.($value ?? ''))

->addLine(';');

}

}