/* * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *
*/
/* * Using a contradiction as a search predicate amounts * to using the physical order of the list (key is neglected). * [LessThan relation -> Ascending order ] -> the minimal element. * [GreaterThan relation -> Descending order] -> the maximal element.
*/ template <typename Node> class HeadNode { public:
HeadNode(const Node* node = NULL) {} booloperator()(const Node* current, const Node* next) { return is_marked_for_removal(next);
}
};
/* * Using a tautology as a search predicate amounts * to using the physical store order of the list (key is neglected). * [LessThan relation -> Ascending order ] -> the maximal element. * [GreaterThan relation -> Descending order] -> the minimal element.
*/ template <typename Node> class LastNode { public:
LastNode(const Node* node = NULL) {} booloperator()(const Node* current, const Node* next ) { returntrue;
}
};
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