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