tests/base_virtual_type_unsafe.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
  15 import kernel
  16
  17 class A
  18         type E: T
  19         fun new_e: E do return new T
  20 end
  21
  22 class B
  23         super A
  24         redef type E: U
  25 end
  26
  27 class T
  28         fun foo do 0.output
  29 end
  30
  31 class U
  32         super T
  33         redef fun foo do 1.output
  34         fun bar do 2.output
  35 end
  36
  37 var a = new A
  38 a.new_e.foo
  39 var b = new B
  40 b.new_e.foo
  41 b.new_e.bar