/src/tools/syntax/tree/liberty_ast_require_else.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_REQUIRE_ELSE
16
17inherit
18   LIBERTY_AST_NON_TERMINAL_NODE
19
20create {LIBERTY_NODE_FACTORY}
21   make
22
23feature {LIBERTY_AST_HANDLER}
24   is_require_else: BOOLEAN is
25      do
26         Result := count = 2 and then nodes.last.name.is_equal(once "KW else")
27      end
28
29   is_require_then: BOOLEAN is
30      do
31         Result := count = 2 and then nodes.last.name.is_equal(once "KW then")
32      end
33
34feature {ANY}
35   count: INTEGER is
36      do
37         Result := nodes.count
38      end
39
40   name: STRING is "Require_Else"
41
42feature {}
43   possible_counts: SET[INTEGER] is
44      once
45         Result := {AVL_SET[INTEGER] << 1, 2 >> }
46      end
47
48end