x = 42
y = null
x! = 42
x ?? 0 = 42
y ?? 99 = 99
if-bind x: 42
if-bind y: none
match some: 42
match none: 0
p?.value = 10
q?.value = 0
o1.inner?.val = 99
o2.inner?.val = 0
narrowed a: 10
guard 42: 42
guard null: 0
both: 10 20
guard2: 7
default next: null
comptime: 141