/src/tools/syntax/tree/liberty_ast_signature.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_SIGNATURE
16
17inherit
18   LIBERTY_AST_NON_TERMINAL_NODE
19
20create {LIBERTY_NODE_FACTORY}
21   make
22
23feature {LIBERTY_AST_HANDLER}
24   feature_names: EIFFEL_LIST_NODE is
25      do
26         Result ::= nodes.item(0)
27      end
28
29   has_result_type: BOOLEAN is
30      do
31         Result := count = 3 or else count = 6
32         check
33            Result implies nodes.last.name.is_equal(once "Type_Definition")
34         end
35      end
36
37   result_type: LIBERTY_AST_TYPE_DEFINITION is
38      require
39         has_result_type
40      do
41         Result ::= nodes.last
42      end
43
44   has_parameters: BOOLEAN is
45      do
46         Result := count >= 4
47         check
48            Result implies nodes.item(2).name.is_equal(once "Declaration*")
49         end
50      end
51
52   parameters: EIFFEL_LIST_NODE is
53      require
54         has_parameters
55      do
56         Result ::= nodes.item(2)
57      end
58
59feature {ANY}
60   count: INTEGER is
61      do
62         Result := nodes.count
63      end
64
65   name: STRING is "Signature"
66
67feature {}
68   possible_counts: SET[INTEGER] is
69      once
70         Result := {AVL_SET[INTEGER] << 1, 3, 4, 6 >> }
71      end
72
73end