Method demo

examples/demo.php:1653–1681

()

class GeneratorDemo
{
    public function demo(): void
    {
        // Generator<int, Pen> — value is 2nd param (Pen)
        foreach ($this->getPens() as $pen) {
            $pen->write();                // resolves to Pen
        }

        // Generator<int, Pencil, mixed, Pen> — value is still 2nd param (Pencil)
        foreach ($this->processPencils() as $pencil) {
            $pencil->sketch();            // Pencil (2nd param), not Pen (4th)
        }

        // @var annotated generator
        /** @var \Generator<int, Pen> $gen */
        $gen = $this->getPens();
        foreach ($gen as $pen) {
            $pen->write();                // Generator<int, Pen> → Pen
        }

        // iterable<Pen> — single param is the value type
        foreach ($this->iterablePens() as $pen) {
            $pen->write();
        }

        // Method chain through generator element
        foreach ($this->getPens() as $pen) {
            $pen->rename('Bold')->color();
        }
    }

    /** @return \Generator<int, Pen> */
    public function getPens(): \Generator