tests/base_types_nullable_formal_and_virtual.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14 import end
  15 interface Object end
  16 enum Bool end
  17 class A
  18         type T: A
  19         var t: T = self
  20         var nt: nullable T = self
  21
  22         type U: nullable A
  23         var u: U = self
  24         var nu: nullable U = self
  25         fun test
  26         do
  27                 __debug__ type T : self.t
  28                 __debug__ type nullable T : self.nt
  29                 __debug__ type U : self.u
  30                 __debug__ type nullable U : self.nu
  31         end
  32 end
  33
  34 var a = new A
  35 __debug__ type A : a.t
  36 __debug__ type nullable A : a.nt
  37 __debug__ type nullable A : a.u
  38 __debug__ type nullable A : a.nu