tests/base_virtual_type_variance_int.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 G
  18         type E: Discrete
  19         var e: nullable E = null
  20         fun foo(e: E)
  21         do
  22                 0.output
  23         end
  24 end
  25
  26 class H
  27         super G
  28         redef type E: Int
  29         redef fun foo(e)
  30         do
  31                 e.bar
  32         end
  33         fun foo2(e: E)
  34         do
  35                 e.output
  36         end
  37 end
  38
  39 redef class Int
  40         fun bar
  41         do
  42                 2.output
  43         end
  44 end
  45 redef class Char
  46         fun not_bar
  47         do
  48                 100.output
  49         end
  50 end
  51
  52 var h: G = new H
  53 var b = 10
  54 var d = 'A'
  55 h.foo(b)
  56 #alt1#h.foo(d)
  57 '!'.output
  58 b.bar
  59 '!'.output
  60 d.not_bar