tests/base_virtual_type_self.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2009 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 A[E]
  20         type T: E
  21         var _t: T
  22         fun foo(t: T) do end
  23         fun foo2: T do return _t
  24         fun bar(t: A[T]) do end
  25         fun bar2: A[T] do return self
  26
  27         init do end
  28 end
  29
  30 class B
  31 #alt3#special A[Int]
  32         type U: Int
  33
  34         fun test
  35         do
  36                 #alt1#var a = new A[Int]
  37                 #alt2#var a = new A[U]
  38                 #alt3#var a = self
  39                 #alt4#var a = new A[A[Int]]
  40                 #alt5#var a = new A[A[U]]
  41
  42                 var f: Float
  43
  44                 a.foo(f)
  45                 f = a.foo2
  46                 a.bar(f)
  47                 f = a.bar2
  48         end
  49 end
  50
  51 (new B).test