# Milestone 5: conditional unwrapping `if opt |v| { ... }`.
# Tests a present optional binds and unwraps, a none takes the else branch, and
# that optional pointers (?*T) unwrap the same way.

main :: func() i32 {
	total i32 = 0

	# present optional scalar -> binds v to the unwrapped value
	a ?i32 = 40
	if a |v| {
		total = total + v          # 40
	} else {
		total = total + 99
	}

	# none -> else branch taken; the binding is not in scope there
	b ?i32 = none
	if b |v| {
		total = total + v
	} else {
		total = total + 2          # 42
	}

	# optional pointer present -> binds q to a non-null @i32; deref proves it
	n i32 = 0
	p ?@i32 = &n
	if p |q| {
		total = total + q^         # +0
	}

	# optional pointer none -> skipped
	z ?@i32 = none
	if z |q| {
		total = total + 1000
	}

	return total                   # expect exit code 42
}