Shorthand for creating function that calls a method on its arguments

[pawaclawczyk]

Example of usage with map method.

class Counter
{
    public static function zero(): Counter
    {
        ...
    }

    public function increment(int $step = 1): Counter
    {
        ...
    }
}

$res0 = Some(Counter::zero())
    ->map(__::increment())
    ->map(__::increment())
;

println($res0);

$res1 = $res0
    ->map(__::increment(3))
;

println($res1);

Some[Counter](Counter(2))
Some[Counter](Counter(5))