/src/lib/automaton/automaton_context.e

 1-- This file is part of a Liberty Eiffel library.
 2-- See the full copyright at the end.
 3--
 4class AUTOMATON_CONTEXT[E_]
 5
 6create {AUTOMATON}
 7   make
 8
 9feature {ANY} -- user data
10   data: E_
11
12   is_valid: BOOLEAN
13
14   current_state: STATE[E_]
15
16feature {AUTOMATON} -- state memo
17   set_current_state (s: like current_state)
18      require
19         s /= Void
20      do
21         current_state := s
22      ensure
23         current_state = s
24      end
25
26   invalidate
27      do
28         is_valid := False
29      ensure
30         not is_valid
31      end
32
33feature {}
34   make (e: E_)
35      do
36         data := e
37         is_valid := True
38      ensure
39         data = e
40      end
41
42end -- class AUTOMATON_CONTEXT
43--
44-- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
45--
46-- Permission is hereby granted, free of charge, to any person obtaining a copy
47-- of this software and associated documentation files (the "Software"), to deal
48-- in the Software without restriction, including without limitation the rights
49-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
50-- copies of the Software, and to permit persons to whom the Software is
51-- furnished to do so, subject to the following conditions:
52--
53-- The above copyright notice and this permission notice shall be included in
54-- all copies or substantial portions of the Software.
55--
56-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
57-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
58-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
59-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
60-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
61-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
62-- THE SOFTWARE.