tests/base_adaptive_loop_null.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 fun foo(i: Int): nullable Int do return i
  18 fun bar(i: Int) do i.output
  19 fun baz: nullable Int do return null
  20
  21 bar(0)
  22 var i = null
  23 while i == null do
  24         i = foo(1) #alt1# exit(1)
  25 end
  26 bar(i)
  27
  28 i = foo(2)
  29 while i != null do
  30         bar(i)
  31         i = baz
  32 end
  33 #alt2#bar(i)
  34
  35 i = null
  36 loop
  37         i = foo(3)
  38         if i == null then continue #alt3#
  39         bar(i)
  40         break
  41 end
  42 bar(i)
  43
  44 i = 4
  45 loop
  46         bar(i)
  47         i = baz
  48         if i != null then
  49                 bar(i)
  50         else
  51                 break #alt4# exit(0)
  52         end
  53 end