tests/base_self_type.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 X
  18         fun foo: SELF do return self
  19         fun bar(o: SELF) do o.output_class_name
  20 end
  21
  22 class Y
  23         super X
  24
  25 #alt1# redef fun foo do return new X
  26 #alt2# redef fun foo do return new Y
  27 end
  28
  29 class A[E]
  30         fun foo: Object do return new G[SELF]
  31 end
  32
  33 class B[F]
  34         super A[F]
  35 end
  36
  37 class G[E:A[nullable Object]]
  38 end
  39
  40 var x = new X
  41 x.output_class_name
  42 x.foo.output_class_name
  43 x.bar x
  44
  45 var y = new Y
  46 y.output_class_name
  47 y.foo.output_class_name
  48 x.bar y
  49 y.bar y
  50 #alt3# y.bar x
  51
  52 var a = new A[Int]
  53 a.output_class_name
  54 a.foo.output_class_name
  55
  56 var b = new B[Bool]
  57 b.output_class_name
  58 b.foo.output_class_name