PHP code example of stratadox / php-generics

1. Go to this page and download the library: Download stratadox/php-generics library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

stratadox / php-generics example snippets



use Stratadox\PhpGenerics\Autoloader;
Autoloader::default()->install();



namespace My\Name\Space;

use My\Generic\Collection;

var_dump(new Collection__string('foo', 'bar'));



namespace My\Name\Space;

use My\Generic\Collection;
use My\Domain\Foo;

var_dump(new Collection__Foo(new Foo(), new Foo()));



namespace Some\Other\Name\Space;

use My\Name\Space\Collection__Foo;

function doSomething(Collection__Foo $list)
{
    // ...
}



namespace My\Name\Space;

use My\Generic\Collection;
use My\Domain\Foo;

var_dump(new Collection__Collection__Foo(
    new Collection__Foo(new Foo(), new Foo()),
    new Collection__Foo(new Foo(), new Foo()),
));



namespace My\Generic;

use Stratadox\PhpGenerics\Annotation\Generic;
use Stratadox\PhpGenerics\Generic\T;use function assert;

/** @Generic(count=1) */
class Collection extends \ArrayObject
{
    public function __construct(T ...$items)
    {
        parent::__construct($items);
    }

    public function offsetSet($index, $value): void
    {
        assert($value instanceof T);
        parent::offsetSet($index, $value);
    }
}



namespace My\Generic;

use ArrayObject;
use Stratadox\PhpGenerics\Annotation\Generic;
use Stratadox\PhpGenerics\Annotation\ReturnType;
use Stratadox\PhpGenerics\Generic\T;

/** @Generic(count=1) */
class Collection extends ArrayObject
{
    public function __construct(T ...$items)
    {
        parent::__construct($items);
    }

    public function offsetSet($index, $value): void
    {
        assert(is_int($index) || null === $index);
        assert($value instanceof T);
        parent::offsetSet($index, $value);
    }

    /** @ReturnType(force="T") */
    public function offsetGet($index)
    {
        return parent::offsetGet($index);
    }
}



namespace My\Name\Space;

use ArrayObject;
use My\Generic\Collection;
use Stratadox\PhpGenerics\Annotation\ReturnType;

final class Collection__string extends Collection
{
    public function __construct(string ...$items)
    {
        ArrayObject::__construct($items);
    }

    public function offsetSet($index, $value): void
    {
        assert(is_int($index) || null === $index);
        assert(is_string($value));
        ArrayObject::offsetSet($index, $value);
    }

    /** @ReturnType(force="T") */
    public function offsetGet($index): string
    {
        return ArrayObject::offsetGet($index);
    }
}