v/vlib/v/tests/anon_sum_type_test.v

fn returns_sumtype() int|string {
	return 1
}

fn returns_sumtype_reverse() int|string {
	return 1
}

fn test_stringification() {
	x := returns_sumtype()
	y := returns_sumtype_reverse()
	assert '${x}' == '${y}'
}

struct Milk {
	egg int|string
}

fn test_struct_with_inline_sumtype() {
	m := Milk{
		egg: 1
	}
	assert m.egg is int
}

interface IMilk {
	egg int|string
}

fn receive_imilk(milk IMilk) {}

fn test_interface_with_inline_sumtype() {
	m := Milk{
		egg: 1
	}
	receive_imilk(m)
}

fn returns_sumtype_in_multireturn() (int|string, string) {
	return 1, ''
}