tests/base_as_notnull2.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[E]
  18         fun foo(e: E): E
  19         do
  20                 var ee = e.as(not null)
  21                 ee.output
  22                 return ee
  23         end
  24 end
  25
  26 class A
  27         super G[Object]
  28         redef fun foo(e)
  29         do
  30                 var ee = e.as(not null)
  31                 ee.output
  32                 return ee
  33         end
  34 end
  35
  36 class B[F: Object]
  37         super G[nullable F]
  38         redef fun foo(e)
  39         do
  40                 var ee = e.as(not null)
  41                 ee.output
  42                 return ee
  43         end
  44 end
  45
  46 class C[F: Object]
  47         super G[F]
  48         redef fun foo(e)
  49         do
  50                 var ee = e.as(not null)
  51                 ee.output
  52                 return ee
  53         end
  54 end
  55
  56 var a = new A
  57 a.foo(1).output
  58 #alt1#a.foo(null).output
  59 var b = new B[Int]
  60 b.foo(2).output
  61 #alt2#b.foo(null).output
  62 var c = new C[Int]
  63 c.foo(3).output
  64 #alt3#c.foo(null).output