tests/base_attr_abstract.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 interface Foo
  18         var a: Object is abstract
  19         #alt1#var b = 1 is abstract
  20         #alt2#var b is abstract, noautoinit
  21 end
  22
  23 class Bar
  24         super Foo
  25         redef var a
  26 end
  27
  28 class Baz
  29         super Foo
  30         redef fun a do return 100
  31         redef fun a=(x) do (101).output
  32 end
  33
  34 class FooBar
  35         super Foo
  36 end
  37
  38 var f: Foo = new Bar(1)
  39 f.a.output
  40 f.a = 2
  41 f.a.output
  42
  43 f = new Baz
  44 f.a.output
  45 f.a = 3
  46 f.a.output
  47
  48 f = new FooBar
  49 #alt3#f.a.output
  50 #alt4#f.a = 4