Option::fromReturn( callable $callback, array $arguments = array(), mixed $noneValue = null )

Creates a lazy-option with the given callback.

Description

This is also a helper constructor for lazy-consuming existing APIs where the return value is not yet an option. By default, we treat null as None case, and everything else as Some.

Parameters

$callback

(callable) (Required) The callback to evaluate.

$arguments

(array) (Optional)

Default value: array()

$noneValue

(mixed) (Optional) The value which should be considered "None"; null by default.

Default value: null

Return

(PhpOptionOption)

Source

File: vendor/phpoption/phpoption/src/PhpOption/Option.php 

    public static function fromReturn($callback, array $arguments = array(), $noneValue = null)
    {
        return new LazyOption(function() use ($callback, $arguments, $noneValue) {
            $return = call_user_func_array($callback, $arguments);

            if ($return === $noneValue) {
                return None::create();
            }

            return new Some($return);
        });
    }

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