tests/base_covar_adapt.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 core::kernel
  16
  17 class A[E]
  18         fun foo(e: E): E
  19         do
  20                 if e == null then e = true
  21                 return e
  22         end
  23 end
  24
  25 fun foo(a: A[nullable Object], o: nullable Object) do
  26         a.foo(o).as(not null).output
  27 end
  28
  29 foo(new A[nullable Object], 1.0)
  30 foo(new A[nullable Float], 1.0)
  31 foo(new A[Float], 1.0)
  32
  33 foo(new A[nullable Object], null)
  34 #alt1#foo(new A[nullable Float], null)
  35 #alt2#foo(new A[Float], null)