/src/tools/syntax/tree/liberty_ast_e9.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_AST_E9
16
17inherit
18   LIBERTY_AST_NON_TERMINAL_NODE
19
20create {LIBERTY_NODE_FACTORY}
21   make
22
23feature {LIBERTY_AST_HANDLER}
24   has_old: BOOLEAN is
25      do
26         Result := count = 2
27         check
28            Result = nodes.first.name.is_equal(once "KW old")
29         end
30      end
31
32   e10: LIBERTY_AST_E10 is
33      do
34         if has_old then
35            Result ::= nodes.item(1)
36         else
37            Result ::= nodes.item(0)
38         end
39      end
40
41feature {ANY}
42   count: INTEGER is
43      do
44         Result := nodes.count
45      end
46
47   name: STRING is "e9"
48
49feature {}
50   possible_counts: SET[INTEGER] is
51      once
52         Result := {AVL_SET[INTEGER] << 1, 2 >> }
53      end
54
55end