/src/lib/backtracking/node/backtracking_node_unary.e

 1-- This file is part of a Liberty Eiffel library.
 2-- See the full copyright at the end.
 3--
 4deferred class BACKTRACKING_NODE_UNARY
 5   --
 6   -- node that reference one subnode
 7   --
 8
 9inherit
10   BACKTRACKING_NODE
11      undefine
12         fill_tagged_out_memory
13      end
14
15insert
16   BACKTRACKING_NODE_FILL
17
18feature {ANY}
19   node: BACKTRACKING_NODE
20         -- the node
21
22   make, set_node (value: BACKTRACKING_NODE)
23      require
24         value_not_void: value /= Void
25      do
26         node := value
27      ensure
28         definition: node = value
29         node_not_void: node /= Void
30      end
31
32invariant
33   node_not_void: node /= Void
34
35end -- class BACKTRACKING_NODE_UNARY
36--
37-- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
38--
39-- Permission is hereby granted, free of charge, to any person obtaining a copy
40-- of this software and associated documentation files (the "Software"), to deal
41-- in the Software without restriction, including without limitation the rights
42-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
43-- copies of the Software, and to permit persons to whom the Software is
44-- furnished to do so, subject to the following conditions:
45--
46-- The above copyright notice and this permission notice shall be included in
47-- all copies or substantial portions of the Software.
48--
49-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
50-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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55-- THE SOFTWARE.