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42 lines
1.4 KiB
PHP
42 lines
1.4 KiB
PHP
#!/usr/bin/env php
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<?php
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require __DIR__ . '/../../vendor/autoload.php';
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use Amp\AsyncGenerator;
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use Amp\Delayed;
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use function Amp\await;
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use function Amp\sleep;
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try {
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/** @psalm-var AsyncGenerator<int, int, int> $generator */
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$generator = new AsyncGenerator(function (): \Generator {
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$value = yield 0;
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$value = yield await(new Delayed(500, $value));
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$value = yield $value;
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$value = yield await(new Delayed(300, $value));
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$value = yield $value;
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$value = yield $value;
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$value = yield await(new Delayed(1000, $value));
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$value = yield $value;
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$value = yield $value;
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$value = yield await(new Delayed(600, $value));
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return $value;
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});
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// Use AsyncGenerator::continue() to get the first emitted value.
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if (null !== $value = $generator->continue()) {
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\printf("Async Generator yielded %d\n", $value);
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// Use AsyncGenerator::send() to send values into the generator and get the next emitted value.
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while (null !== $value = $generator->send($value + 1)) {
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\printf("Async Generator yielded %d\n", $value);
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sleep(100); // Listener consumption takes 100 ms.
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}
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}
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\printf("Async Generator returned %d\n", $generator->getReturn());
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} catch (\Exception $exception) {
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\printf("Exception: %s\n", (string) $exception);
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}
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