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54 lines
1.2 KiB
PHP
54 lines
1.2 KiB
PHP
<?php
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namespace Amp;
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/**
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* Creates a successful promise using the given value (which can be any value except an object implementing
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* `Amp\Promise`).
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*
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* @template-covariant TValue
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* @template-implements Promise<TValue>
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*/
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final class Success implements Promise
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{
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private mixed $value;
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/**
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* @param mixed $value Anything other than a Promise object.
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*
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* @psalm-param TValue $value
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*
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* @throws \Error If a promise is given as the value.
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*/
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public function __construct(mixed $value = null)
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{
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if ($value instanceof Promise) {
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throw new \Error("Cannot use a promise as success value");
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}
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$this->value = $value;
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}
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/**
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* Catches any destructor exception thrown and rethrows it to the event loop.
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*/
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public function __destruct()
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{
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try {
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$this->value = null;
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} catch (\Throwable $e) {
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Loop::defer(static function () use ($e): void {
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throw $e;
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});
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function onResolve(callable $onResolved): void
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{
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Loop::defer(fn() => $onResolved(null, $this->value));
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}
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}
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