php - How to make PhpStorm understand DsMap key type?

Question

I want to have type checking on a DsMap variable. In order to do this I've declared a dummy interface and declared types there:

/**
 * @method OtherType offsetGet(MyType $offset)
 * @method void offsetSet(MyType $offset, OtherType $value)
 */
interface MyMap extends ArrayAccess, Iterator
{
}

But when I use it:

/** @var Map|MyMap $map */
$map = new DsMap();
$map[$offset] = $value;

- PhpStorm doesn't recognize it and shows a warning: Illegal array key type MyType. How do I fix that?

question from:https://stackoverflow.com/questions/65871304/how-to-make-phpstorm-understand-ds-map-key-type

Answer 1

Use sth like this in the first of your code to say to the phpstorm where is your interface:

use nampespaceMyMap;