/src/tools/syntax/tree/liberty_ast_feature_name_or_alias.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_FEATURE_NAME_OR_ALIAS
16
17inherit
18   LIBERTY_AST_NON_TERMINAL_NODE
19
20create {LIBERTY_NODE_FACTORY}
21   make
22
23feature {LIBERTY_AST_HANDLER}
24   is_infix: BOOLEAN is
25      do
26         Result := count = 2 and then nodes.first.name.is_equal(once "KW infix")
27      ensure
28         Result implies not is_regular and then not is_prefix
29      end
30
31   is_prefix: BOOLEAN is
32      do
33         Result := count = 2 and then nodes.first.name.is_equal(once "KW prefix")
34      ensure
35         Result implies not is_regular and then not is_infix
36      end
37
38   is_regular: BOOLEAN is
39      do
40         Result := count = 1
41      ensure
42         Result implies not is_prefix and then not is_infix
43      end
44
45   entity_name: LIBERTY_AST_ENTITY_NAME is
46      require
47         is_regular
48      do
49         Result ::= nodes.item(0)
50      end
51
52   free_operator_name: LIBERTY_AST_STRING is
53      require
54         is_prefix or else is_infix
55      do
56         Result ::= nodes.item(1)
57      end
58
59feature {ANY}
60   count: INTEGER is
61      do
62         Result := nodes.count
63      end
64
65   name: STRING is "Feature_Name_Or_Alias"
66
67feature {}
68   possible_counts: SET[INTEGER] is
69      once
70         Result := {AVL_SET[INTEGER] << 1, 2 >> }
71      end
72
73end