1324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/* 2324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver[The "BSD licence"] 3324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverCopyright (c) 2005-2007 Kunle Odutola 4324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverAll rights reserved. 5324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 6324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverRedistribution and use in source and binary forms, with or without 7324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruvermodification, are permitted provided that the following conditions 8324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruverare met: 9324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver1. Redistributions of source code MUST RETAIN the above copyright 10324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver notice, this list of conditions and the following disclaimer. 11324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver2. Redistributions in binary form MUST REPRODUCE the above copyright 12324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver notice, this list of conditions and the following disclaimer in 13324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver the documentation and/or other materials provided with the 14324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver distribution. 15324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver3. The name of the author may not be used to endorse or promote products 16324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver derived from this software without specific prior WRITTEN permission. 17324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver4. Unless explicitly state otherwise, any contribution intentionally 18324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver submitted for inclusion in this work to the copyright owner or licensor 19324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver shall be under the terms and conditions of this license, without any 20324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver additional terms or conditions. 21324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 22324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverTHIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverIMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverOF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverIN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverINCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverNOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverDATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverTHEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31324c4644fee44b9898524c09511bd33c3f12e2dfBen GruverTHIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver*/ 33324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 34324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 35324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruvernamespace Antlr.Runtime.Collections 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver{ 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver using System; 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver using ArrayList = System.Collections.ArrayList; 39324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// <summary> 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// Stack abstraction that also supports the IList interface 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// </summary> 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public class StackList : ArrayList 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 45324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public StackList() : base() 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 48324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 49324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// <summary> 50324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// Adds an element to the top of the stack list. 51324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// </summary> 52324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public void Push(object item) 53324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 54324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver Add(item); 55324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 56324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 57324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// <summary> 58324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// Removes the element at the top of the stack list and returns it. 59324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// </summary> 60324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// <returns>The element at the top of the stack.</returns> 61324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public object Pop() 62324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 63324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver object poppedItem = this[this.Count - 1]; 64324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver RemoveAt(this.Count - 1); 65324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return poppedItem; 66324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 67324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 68324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// <summary> 69324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// Removes the element at the top of the stack list without removing it. 70324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// </summary> 71324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /// <returns>The element at the top of the stack.</returns> 72324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public object Peek() 73324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 74324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return this[this.Count - 1]; 75324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 76324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 77324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver}