Method demo

examples/demo.php:3245–3275

(?Pen $pen, ?User $user)

class SimplifyNullDemo
{
    public function demo(?Pen $pen, ?User $user): void
    {
        // ── isset → ?? ─────────────────────────────────────────────
        // Code action: "Simplify to ??"  →  $pen ?? makePen()
        $tool = isset($pen) ? $pen : makePen();

        // ── !== null → ?? ──────────────────────────────────────────
        // Code action: "Simplify to ??"  →  $pen ?? makePen()
        $tool2 = $pen !== null ? $pen : makePen();

        // ── === null (reversed) → ?? ───────────────────────────────
        // Code action: "Simplify to ??"  →  $user ?? createUser()
        $fallback = $user === null ? createUser() : $user;

        // ── !== null + method call → ?-> ───────────────────────────
        // Code action: "Simplify to ?->"  →  $pen?->color()
        $color = $pen !== null ? $pen->color() : null;

        // ── !== null + property access → ?-> ───────────────────────
        // Code action: "Simplify to ?->"  →  $user?->email
        $email = $user !== null ? $user->email : null;

        // ── === null + method (reversed) → ?-> ─────────────────────
        // Code action: "Simplify to ?->"  →  $pen?->label()
        $label = $pen === null ? null : $pen->label();

        // ── Compound subject → correct ?-> placement ───────────────
        // Code action: "Simplify to ?->"  →  $user->getProfile()?->getDisplayName()
        $profile = $user->getProfile();
        $name = $profile !== null ? $profile->getDisplayName() : null;
    }
}