tests/base_virtual_type_check.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 class A
  17         type T: K
  18         type U: T
  19         fun check(o: Object)
  20         do
  21                 o.output
  22                 '<'.output
  23                 'T'.output
  24                 (o isa T).output
  25                 o.output
  26                 '<'.output
  27                 'U'.output
  28                 (o isa U).output
  29         end
  30         fun check2(o: T)
  31         do
  32                 o.output
  33                 '<'.output
  34                 'T'.output
  35                 '\n'.output
  36         end
  37         fun check3(o: U)
  38         do
  39                 o.output
  40                 '<'.output
  41                 'U'.output
  42                 '\n'.output
  43         end
  44 end
  45 class B
  46         super A
  47         redef type T: L
  48 end
  49 class J
  50         redef fun output do 'J'.output
  51 end
  52 class K
  53         super J
  54         redef fun output do 'K'.output
  55 end
  56 class L
  57         super K
  58         redef fun output do 'L'.output
  59 end
  60
  61 var a = new A
  62 a.check(new J)
  63 a.check(new K)
  64 a.check(new L)
  65 #alt1#a.check2(new J) # Static error
  66 a.check2(new K)
  67 a.check2(new L)
  68 #alt2#a.check3(new J) # Static error
  69 a.check3(new K)
  70 a.check3(new L)
  71 var b = new B
  72 b.check(new J)
  73 b.check(new K)
  74 b.check(new L)
  75 #alt3#b.check2(new J) # Static error
  76 #alt4#b.check2(new K) # Static error
  77 b.check2(new L)
  78 #alt5#b.check3(new J) # Static error
  79 #alt6#b.check3(new K) # Static error
  80 b.check3(new L)
  81 var ab: A = new B
  82 ab.check(new J)
  83 ab.check(new K)
  84 ab.check(new L)
  85 #alt7#ab.check2(new J) # Static error
  86 #alt8#ab.check2(new K) # Dynamic error
  87 ab.check2(new L)
  88 #alt9#ab.check3(new J) # Static error
  89 #alt10#ab.check3(new K) # Dynamic error
  90 ab.check3(new L)