1. $x.$y

$a[ $.b[value] ]

2. ${a.b}.something
3. ${a.b}[something]

$b[finally works]
$[a]{$b}
4. $a!

$a[ $.b[c] ]

$v[^hash::create[]]
$v.[$a.b][ $.x[y] ]

5. $v.c.x

$a[c]
$b[x]

6. $v.$a.$b

$b[a]

7. $v.[$$b].x