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20 lines
588 B
PHP
20 lines
588 B
PHP
<?php
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namespace Amp;
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/**
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* Representation of the future value of an asynchronous operation.
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*/
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interface Promise {
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/**
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* Registers a callback to be invoked when the promise is resolved.
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*
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* If the promise is already resolved, the callback MUST be executed immediately.
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*
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* @param callable(\Throwable|\Exception|null $reason, $value) $onResolved `$reason` shall be `null` on
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* success, `$value` shall be `null` on failure.
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*
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* @return mixed Return type and value are unspecified.
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*/
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public function when(callable $onResolved);
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} |