/src/tools/semantics/types/conformance_checker/liberty_tuple_conformance_checker.e

 1-- This file is part of Liberty Eiffel.
 2--
 3-- Liberty Eiffel is free software: you can redistribute it and/or modify
 4-- it under the terms of the GNU General Public License as published by
 5-- the Free Software Foundation, version 3 of the License.
 6--
 7-- Liberty Eiffel is distributed in the hope that it will be useful,
 8-- but WITHOUT ANY WARRANTY; without even the implied warranty of
 9-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10-- GNU General Public License for more details.
11--
12-- You should have received a copy of the GNU General Public License
13-- along with Liberty Eiffel.  If not, see <http://www.gnu.org/licenses/>.
14--
15class LIBERTY_TUPLE_CONFORMANCE_CHECKER
16
17inherit
18   LIBERTY_GENERICS_CONFORMANCE_CHECKER
19      undefine
20         is_equal
21      end
22
23insert
24   SINGLETON
25
26creation {LIBERTY_UNIVERSE}
27   make
28
29feature {LIBERTY_ACTUAL_TYPE}
30   inherits (parent, child: LIBERTY_KNOWN_TYPE): BOOLEAN is
31      do
32         Result := check_inheritance(parent, child, True)
33      end
34
35   inserts (parent, child: LIBERTY_KNOWN_TYPE): BOOLEAN is
36      do
37         Result := check_inheritance(parent, child, False)
38      end
39
40feature {}
41   check_inheritance (parent, child: LIBERTY_KNOWN_TYPE; conformance: BOOLEAN): BOOLEAN is
42      local
43         i: INTEGER
44      do
45         check
46            parent.parameters.lower = child.parameters.lower
47         end
48         from
49            Result := parent.parameters.count <= child.parameters.count
50            i := parent.parameters.lower
51         until
52            not Result or else i > parent.parameters.upper
53         loop
54            check
55               parent.parameters.item(i).is_known
56               child.parameters.item(i).is_known
57            end
58            if conformance then
59               Result := child.parameters.item(i).known_type.is_conform_to(parent.parameters.item(i).known_type)
60            else
61               Result := child.parameters.item(i).known_type.is_non_conformant_child_of(parent.parameters.item(i).known_type)
62            end
63            i := i + 1
64         end
65      end
66
67feature {}
68   make is
69      do
70      end
71
72end -- class LIBERTY_TUPLE_CONFORMANCE_CHECKER