1324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver/* 2324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * [The "BSD licence"] 3324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Copyright (c) 2005-2008 Terence Parr 4324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * All rights reserved. 5324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 6324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Conversion to C#: 7324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. 8324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * All rights reserved. 9324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 10324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * Redistribution and use in source and binary forms, with or without 11324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * modification, are permitted provided that the following conditions 12324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * are met: 13324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 1. Redistributions of source code must retain the above copyright 14324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer. 15324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 2. Redistributions in binary form must reproduce the above copyright 16324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * notice, this list of conditions and the following disclaimer in the 17324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * documentation and/or other materials provided with the distribution. 18324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 3. The name of the author may not be used to endorse or promote products 19324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * derived from this software without specific prior written permission. 20324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * 21324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver */ 32324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 33324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruvernamespace Antlr.Runtime.Tree { 34324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 35324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** <summary>A node representing erroneous token range in token stream</summary> */ 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver [System.Serializable] 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public class CommonErrorNode : CommonTree { 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public IIntStream input; 39324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public IToken start; 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public IToken stop; 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public RecognitionException trappedException; 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public CommonErrorNode(ITokenStream input, IToken start, IToken stop, 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver RecognitionException e) { 45324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver //System.out.println("start: "+start+", stop: "+stop); 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (stop == null || 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver (stop.TokenIndex < start.TokenIndex && 48324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver stop.Type != TokenTypes.EndOfFile)) { 49324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // sometimes resync does not consume a token (when LT(1) is 50324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // in follow set. So, stop will be 1 to left to start. adjust. 51324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // Also handle case where start is the first token and no token 52324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // is consumed during recovery; LT(-1) will return null. 53324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver stop = start; 54324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 55324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.input = input; 56324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.start = start; 57324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.stop = stop; 58324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.trappedException = e; 59324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 60324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 61324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver #region Properties 62324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override bool IsNil { 63324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver get { 64324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return false; 65324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 66324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 67324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override string Text { 68324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver get { 69324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver string badText = null; 70324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (start is IToken) { 71324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int i = ((IToken)start).TokenIndex; 72324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int j = ((IToken)stop).TokenIndex; 73324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (((IToken)stop).Type == TokenTypes.EndOfFile) { 74324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver j = ((ITokenStream)input).Count; 75324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 76324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver badText = ((ITokenStream)input).ToString(i, j); 77324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } else if (start is ITree) { 78324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver badText = ((ITreeNodeStream)input).ToString(start, stop); 79324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } else { 80324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // people should subclass if they alter the tree type so this 81324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // next one is for sure correct. 82324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver badText = "<unknown>"; 83324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 84324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return badText; 85324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 86324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver set { 87324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 88324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 89324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override int Type { 90324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver get { 91324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return TokenTypes.Invalid; 92324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 93324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver set { 94324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 95324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 96324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver #endregion 97324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 98324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override string ToString() { 99324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if (trappedException is MissingTokenException) { 100324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<missing type: " + 101324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ((MissingTokenException)trappedException).MissingType + 102324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ">"; 103324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } else if (trappedException is UnwantedTokenException) { 104324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<extraneous: " + 105324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ((UnwantedTokenException)trappedException).UnexpectedToken + 106324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ", resync=" + Text + ">"; 107324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } else if (trappedException is MismatchedTokenException) { 108324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<mismatched token: " + trappedException.Token + ", resync=" + Text + ">"; 109324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } else if (trappedException is NoViableAltException) { 110324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<unexpected: " + trappedException.Token + 111324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ", resync=" + Text + ">"; 112324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 113324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<error: " + Text + ">"; 114324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 115324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 116324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 117