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 36324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver /** <summary>A node representing erroneous token range in token stream</summary> */ 37324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver [System.Serializable] 38324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public class CommonErrorNode : CommonTree 39324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 40324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public IIntStream input; 41324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public IToken start; 42324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public IToken stop; 43324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public RecognitionException trappedException; 44324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 45324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public CommonErrorNode( ITokenStream input, IToken start, IToken stop, 46324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver RecognitionException e ) 47324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 48324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver //System.out.println("start: "+start+", stop: "+stop); 49324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( stop == null || 50324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ( stop.TokenIndex < start.TokenIndex && 51324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver stop.Type != TokenTypes.EndOfFile ) ) 52324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 53324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // sometimes resync does not consume a token (when LT(1) is 54324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // in follow set. So, stop will be 1 to left to start. adjust. 55324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // Also handle case where start is the first token and no token 56324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // is consumed during recovery; LT(-1) will return null. 57324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver stop = start; 58324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 59324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.input = input; 60324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.start = start; 61324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.stop = stop; 62324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver this.trappedException = e; 63324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 64324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 65324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver #region Properties 66324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override bool IsNil 67324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 68324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver get 69324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 70324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return false; 71324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 72324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 73324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override string Text 74324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 75324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver get 76324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 77324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver string badText = null; 78324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( start is IToken ) 79324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 80324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int i = ( (IToken)start ).TokenIndex; 81324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver int j = ( (IToken)stop ).TokenIndex; 82324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( ( (IToken)stop ).Type == TokenTypes.EndOfFile ) 83324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 84324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver j = ( (ITokenStream)input ).Count; 85324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 86324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver badText = ( (ITokenStream)input ).ToString( i, j ); 87324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 88324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else if ( start is ITree ) 89324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 90324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver badText = ( (ITreeNodeStream)input ).ToString( start, stop ); 91324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 92324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else 93324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 94324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // people should subclass if they alter the tree type so this 95324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver // next one is for sure correct. 96324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver badText = "<unknown>"; 97324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 98324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return badText; 99324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 100324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver set 101324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 102324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 103324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 104324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override int Type 105324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 106324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver get 107324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 108324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return TokenTypes.Invalid; 109324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 110324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver set 111324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 112324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 113324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 114324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver #endregion 115324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver 116324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver public override string ToString() 117324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 118324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver if ( trappedException is MissingTokenException ) 119324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 120324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<missing type: " + 121324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ( (MissingTokenException)trappedException ).MissingType + 122324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ">"; 123324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 124324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else if ( trappedException is UnwantedTokenException ) 125324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 126324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<extraneous: " + 127324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ( (UnwantedTokenException)trappedException ).UnexpectedToken + 128324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ", resync=" + Text + ">"; 129324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 130324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else if ( trappedException is MismatchedTokenException ) 131324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 132324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<mismatched token: " + trappedException.Token + ", resync=" + Text + ">"; 133324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 134324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver else if ( trappedException is NoViableAltException ) 135324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver { 136324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<unexpected: " + trappedException.Token + 137324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver ", resync=" + Text + ">"; 138324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 139324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver return "<error: " + Text + ">"; 140324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 141324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver } 142324c4644fee44b9898524c09511bd33c3f12e2dfBen Gruver} 143