Option

Provides an Option type implementation for PHP.

Installation

You can install the package via composer:

composer require ghostwriter/option

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Usage

use Ghostwriter\Option\Exception\NullPointerException;
use Ghostwriter\Option\None;
use Ghostwriter\Option\Some;
use Ghostwriter\Option\Option;

$message = '#BlackLivesMatter';
Option::new($message); // return `Some`

$some = Some::new($message); // return `Some`
echo $some->get(); // prints #BlackLivesMatter

$none = None::new(); // return `None`

// calling the `get` method on `None` will throw `NullPointerException`
echo $none->get(); // throw `NullPointerException`

echo $none->getOr('#BLM'); // prints #BLM

// calling the `new` static method with `null` will return `None`
Option::new(null); // return `None`

// calling the `new` static method with `null will throw `NullPointerException`
Some::new(null); // throws `NullPointerException`

// calling the `new` static method with `None will throw `NullPointerException`
Some::new(None::new()); // throws `NullPointerException`

--- Example

function divide(int $x, int $y): OptionInterface
{
    if ($y === 0) {
        return None::new();
    }

    return Some::new($x / $y);
}

divide(1, 0); // None
divide(1, 1); // Some(1)

Testing

composer test

Credits

• Nathanael Esayeas
• All Contributors

Changelog

Please see CHANGELOG.md for more information on what has changed recently.

License

Please see LICENSE for more information on the license that applies to this project.

Security

Please see SECURITY.md for more information on security disclosure process.