Changes between Version 3 and Version 4 of NilableTypes

NilableTypes

v3	v4
11	11	e.g.
12	12	{{{
	13	#!cobra
13	14	str as String = "Mystring" # str can only have a String value
14	15	strN as String? # strN may have a String value OR nil
…	…
20	21
21	22	{{{
	23	#!cobra
22	24	def sendWelcome(cust as Customer, referral as Customer?)
23	25	# will not accept nil for `cust`
…	…
39	41	e.g.
40	42	{{{
	43	#!cobra
41	44	s as String = 'a string'
42	45	sn = s to ? # sn is String?
…	…
49	52	You can explicitly test for nil or not nil values using normal conditionals (true is non-nil)
50	53	{{{
	54	#!cobra
51	55	s as String = 'sss'
52	56	assert s
…	…
69	73	'''a ! b ''' evaluate b if a not nil.
70	74	{{{
	75	#!cobra
71	76	stuff as String? = nil
72	77	defaultStuff='DEFAULT'