tests/base_nullable.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2009 Jean Privat <jean@pryen.org>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 import kernel
  18
  19 class A
  20         var _i: Int
  21         init (i: Int) do _i = i
  22         redef fun output do _i.output
  23 end
  24
  25 var a: A
  26 var na: nullable A
  27 var o: Object
  28 var no: nullable Object
  29
  30 var a: A = new A(1)
  31 var na: nullable A = new A(2)
  32 var o: Object = new A(3)
  33 var no: nullable Object = new A(4)
  34
  35 var a1: A = a
  36 #alt1#var a2: A = na
  37 #alt2#var a3: A = o
  38 #alt3#var a4: A = no
  39 var na1: nullable A = na
  40 var na2: nullable A = a
  41 #alt4#var na3: nullable A = o
  42 #alt5#var na4: nullable A = no
  43 var o1: Object = a
  44 #alt6#var o2: Object = na
  45 var o3: Object = o
  46 #alt7#var o4: Object = no
  47 var no1: nullable Object = a
  48 var no2: nullable Object = na
  49 var no3: nullable Object = o
  50 var no4: nullable Object = no
  51 #alt8# var na5: nullable A = new nullable A(4)
  52
  53 #alt9#var a6: A = null
  54 var na6: nullable A = null
  55 #alt10#var o6: Object = null
  56 var no6: nullable Object = null
  57