tests/test_gen_inh.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2004-2008 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 Gen1[E, F]
  20 special Object
  21    readable writable var _e: E
  22    var _f_: F
  23    fun f: F do return _f_ end
  24    fun f=(x: F) do _f_ = x end
  25
  26    init(e:E) do _e = e
  27 end
  28
  29 class Gen2[G: Int]
  30 special Gen1[G, Char]
  31    init(e:G) do super(e)
  32 end
  33
  34 class Gen3[H: Int]
  35 special Gen1[H, Char]
  36    redef readable redef writable redef var _e: H
  37    redef var _f_: Char = 'N'
  38    redef fun f: Char do return _f_ end
  39    redef fun f=(x: Char) do _f_ = x end
  40
  41    init(e:H) do super(e)
  42 end
  43
  44 var g1 = new Gen1[Int, Char](1)
  45 var g2 = new Gen2[Int](2)
  46 var g3 = new Gen3[Int](3)
  47 g1.e = 1
  48 g1.f = '1'
  49 g2.e = 2
  50 g2.f = '2'
  51 g3.e = 3
  52 g3.f = '3'
  53
  54 g1.f.output
  55 g1.e.output
  56 g2.f.output
  57 g2.e.output
  58 g3.f.output
  59 g3.e.output
  60
  61 g1 = g2
  62 g1.f.output
  63 g1.e.output
  64
  65 g1 = g3
  66 g1.f.output
  67 g1.e.output