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diff --git a/libtnsl/box/list.tnsl b/libtnsl/box/list.tnsl
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+/##
+	Copyright 2021 Kyle Gunger
+
+	Dual licensed under the CDDL 1.0 and BSD 3-Clause licenses.
+
+	This file may only be used in accordance with one of the two
+	licenses.  You should have received a copy of each license with
+	the source code.  In the event that you did not recieve a copy
+	of the licenses, they may be found at the following URLs:
+
+	CDDL 1.0:
+	https://opensource.org/licenses/CDDL-1.0
+
+	BSD 3-Clause:
+	https://opensource.org/licenses/BSD-3-Clause
+
+	THIS SOFTWARE/SOURCE CODE IS PROVIDED "AS IS" WITH NO
+	WARRANTY, GUARANTEE, OR CLAIM OF FITNESS FOR ANY PURPOSE
+	EXPRESS OR IMPLIED
+#/
+
+;struct LNode (type T) {
+	T data,
+	~void next
+}
+
+/; method LNode
+	/; get_next_type (type B) [LNode(B)]
+		;return (self.next)[~LNode(B)]`
+	;/
+
+	/; get_next [LNode(T)]
+		;return (self.next)[~LNode(T)]`
+	;/
+;/
+
+;struct DLNode (type T) extends LNode(T) {
+	super,
+	~void prev
+}
+
+/; method DLNode
+	/; get_prev_type (type B) [LNode(B)]
+		;return (self.prev)[~LNode(B)]`
+	;/
+
+	/; get_prev [LNode(T)]
+		;return (self.prev)[~LNode(T)]`
+	;/
+;/
+
+;struct List {
+	uint length,
+
+	LNode
+		first,
+		last
+}
+
+;struct DList {
+	uint length,
+
+	DLNode
+		first,
+		last
+}
+\ No newline at end of file