2020-10-15 18:42:54 +02:00
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title: danog\MadelineProto\Coroutine: Creates a promise from a generator function yielding promises.
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description: When a promise is yielded, execution of the generator is interrupted until the promise is resolved. A success
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value is sent into the generator, while a failure reason is thrown into the generator. Using a coroutine,
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asynchronous code can be written without callbacks and be structured like synchronous code.
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---
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# `danog\MadelineProto\Coroutine`
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[Back to index](../../index.md)
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> Author: Daniil Gentili <daniil@daniil.it>
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Creates a promise from a generator function yielding promises.
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When a promise is yielded, execution of the generator is interrupted until the promise is resolved. A success
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value is sent into the generator, while a failure reason is thrown into the generator. Using a coroutine,
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asynchronous code can be written without callbacks and be structured like synchronous code.
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## Method list:
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* `fail(\Throwable $reason): void`
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* `offsetGet(mixed $offset): \Amp\Promise`
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* `getTrace(): array`
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* `getFrame(): array`
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* `jsonSerialize(): string`
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* `onResolve()`
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## Methods:
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### `fail(\Throwable $reason): void`
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Parameters:
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* `$reason`: `\Throwable` Failure reason.
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#### See also:
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* `\Throwable`
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2020-10-15 19:11:10 +02:00
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---
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Generated by [danog/phpdoc](https://phpdoc.daniil.it)
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2020-10-15 18:42:54 +02:00
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### `offsetGet(mixed $offset): \Amp\Promise`
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Get data at an array offset asynchronously.
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Parameters:
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* `$offset`: `mixed` Offset
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#### See also:
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* `\Amp\Promise`
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2020-10-15 19:11:10 +02:00
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---
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Generated by [danog/phpdoc](https://phpdoc.daniil.it)
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2020-10-15 18:42:54 +02:00
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### `getTrace(): array`
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Get current stack trace for running coroutine.
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2020-10-15 19:11:10 +02:00
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---
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Generated by [danog/phpdoc](https://phpdoc.daniil.it)
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2020-10-15 18:42:54 +02:00
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### `getFrame(): array`
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Get current execution frame.
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2020-10-15 19:11:10 +02:00
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---
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Generated by [danog/phpdoc](https://phpdoc.daniil.it)
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2020-10-15 18:42:54 +02:00
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### `jsonSerialize(): string`
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Obtain.
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2020-10-15 19:11:10 +02:00
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---
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Generated by [danog/phpdoc](https://phpdoc.daniil.it)
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2020-10-15 18:42:54 +02:00
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### `onResolve()`
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2020-10-15 19:11:10 +02:00
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---
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Generated by [danog/phpdoc](https://phpdoc.daniil.it)
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2020-10-15 18:42:54 +02:00
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2020-10-15 19:11:10 +02:00
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---
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Generated by [danog/phpdoc](https://phpdoc.daniil.it)
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