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Diffstat (limited to 'runtime/CSharp3/Sources/Antlr3.Runtime/RecognitionException.cs')
| -rw-r--r-- | runtime/CSharp3/Sources/Antlr3.Runtime/RecognitionException.cs | 474 |
1 files changed, 0 insertions, 474 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/RecognitionException.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/RecognitionException.cs deleted file mode 100644 index 007560d..0000000 --- a/runtime/CSharp3/Sources/Antlr3.Runtime/RecognitionException.cs +++ /dev/null @@ -1,474 +0,0 @@ -/* - * [The "BSD license"] - * Copyright (c) 2011 Terence Parr - * All rights reserved. - * - * Conversion to C#: - * Copyright (c) 2011 Sam Harwell, Tunnel Vision Laboratories, LLC - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -namespace Antlr.Runtime -{ - using Antlr.Runtime.Tree; - - using ArgumentNullException = System.ArgumentNullException; - using Exception = System.Exception; - using NotSupportedException = System.NotSupportedException; - using SerializationInfo = System.Runtime.Serialization.SerializationInfo; - using StreamingContext = System.Runtime.Serialization.StreamingContext; - - /** <summary>The root of the ANTLR exception hierarchy.</summary> - * - * <remarks> - * To avoid English-only error messages and to generally make things - * as flexible as possible, these exceptions are not created with strings, - * but rather the information necessary to generate an error. Then - * the various reporting methods in Parser and Lexer can be overridden - * to generate a localized error message. For example, MismatchedToken - * exceptions are built with the expected token type. - * So, don't expect getMessage() to return anything. - * - * Note that as of Java 1.4, you can access the stack trace, which means - * that you can compute the complete trace of rules from the start symbol. - * This gives you considerable context information with which to generate - * useful error messages. - * - * ANTLR generates code that throws exceptions upon recognition error and - * also generates code to catch these exceptions in each rule. If you - * want to quit upon first error, you can turn off the automatic error - * handling mechanism using rulecatch action, but you still need to - * override methods mismatch and recoverFromMismatchSet. - * - * In general, the recognition exceptions can track where in a grammar a - * problem occurred and/or what was the expected input. While the parser - * knows its state (such as current input symbol and line info) that - * state can change before the exception is reported so current token index - * is computed and stored at exception time. From this info, you can - * perhaps print an entire line of input not just a single token, for example. - * Better to just say the recognizer had a problem and then let the parser - * figure out a fancy report. - * </remarks> - */ - [System.Serializable] - public class RecognitionException : Exception - { - /** <summary>What input stream did the error occur in?</summary> */ - private IIntStream _input; - - /// <summary> - /// What was the lookahead index when this exception was thrown? - /// </summary> - private int _k; - - /** <summary>What is index of token/char were we looking at when the error occurred?</summary> */ - private int _index; - - /** <summary> - * The current Token when an error occurred. Since not all streams - * can retrieve the ith Token, we have to track the Token object. - * For parsers. Even when it's a tree parser, token might be set. - * </summary> - */ - private IToken _token; - - /** <summary> - * If this is a tree parser exception, node is set to the node with - * the problem. - * </summary> - */ - private object _node; - - /** <summary>The current char when an error occurred. For lexers.</summary> */ - private int _c; - - /** <summary> - * Track the line (1-based) at which the error occurred in case this is - * generated from a lexer. We need to track this since the - * unexpected char doesn't carry the line info. - * </summary> - */ - private int _line; - - /// <summary> - /// The 0-based index into the line where the error occurred. - /// </summary> - private int _charPositionInLine; - - /** <summary> - * If you are parsing a tree node stream, you will encounter som - * imaginary nodes w/o line/col info. We now search backwards looking - * for most recent token with line/col info, but notify getErrorHeader() - * that info is approximate. - * </summary> - */ - private bool _approximateLineInfo; - - /** <summary>Used for remote debugger deserialization</summary> */ - public RecognitionException() - : this("A recognition error occurred.", null, null) - { - } - - public RecognitionException(IIntStream input) - : this("A recognition error occurred.", input, 1, null) - { - } - - public RecognitionException(IIntStream input, int k) - : this("A recognition error occurred.", input, k, null) - { - } - - public RecognitionException(string message) - : this(message, null, null) - { - } - - public RecognitionException(string message, IIntStream input) - : this(message, input, 1, null) - { - } - - public RecognitionException(string message, IIntStream input, int k) - : this(message, input, k, null) - { - } - - public RecognitionException(string message, Exception innerException) - : this(message, null, innerException) - { - } - - public RecognitionException(string message, IIntStream input, Exception innerException) - : this(message, input, 1, innerException) - { - } - - public RecognitionException(string message, IIntStream input, int k, Exception innerException) - : base(message, innerException) - { - this._input = input; - this._k = k; - if (input != null) - { - this._index = input.Index + k - 1; - if (input is ITokenStream) - { - this._token = ((ITokenStream)input).LT(k); - this._line = _token.Line; - this._charPositionInLine = _token.CharPositionInLine; - } - - ITreeNodeStream tns = input as ITreeNodeStream; - if (tns != null) - { - ExtractInformationFromTreeNodeStream(tns, k); - } - else - { - ICharStream charStream = input as ICharStream; - if (charStream != null) - { - int mark = input.Mark(); - try - { - for (int i = 0; i < k - 1; i++) - input.Consume(); - - this._c = input.LA(1); - this._line = ((ICharStream)input).Line; - this._charPositionInLine = ((ICharStream)input).CharPositionInLine; - } - finally - { - input.Rewind(mark); - } - } - else - { - this._c = input.LA(k); - } - } - } - } - - protected RecognitionException(SerializationInfo info, StreamingContext context) - : base(info, context) - { - if (info == null) - throw new ArgumentNullException("info"); - - _index = info.GetInt32("Index"); - _c = info.GetInt32("C"); - _line = info.GetInt32("Line"); - _charPositionInLine = info.GetInt32("CharPositionInLine"); - _approximateLineInfo = info.GetBoolean("ApproximateLineInfo"); - } - - /** <summary>Return the token type or char of the unexpected input element</summary> */ - public virtual int UnexpectedType - { - get - { - if ( _input is ITokenStream ) - { - return _token.Type; - } - - ITreeNodeStream treeNodeStream = _input as ITreeNodeStream; - if ( treeNodeStream != null ) - { - ITreeAdaptor adaptor = treeNodeStream.TreeAdaptor; - return adaptor.GetType( _node ); - } - - return _c; - } - } - - public bool ApproximateLineInfo - { - get - { - return _approximateLineInfo; - } - protected set - { - _approximateLineInfo = value; - } - } - - public IIntStream Input - { - get - { - return _input; - } - protected set - { - _input = value; - } - } - - public int Lookahead - { - get - { - return _k; - } - } - - public IToken Token - { - get - { - return _token; - } - set - { - _token = value; - } - } - - public object Node - { - get - { - return _node; - } - protected set - { - _node = value; - } - } - - public int Character - { - get - { - return _c; - } - protected set - { - _c = value; - } - } - - public int Index - { - get - { - return _index; - } - protected set - { - _index = value; - } - } - - public int Line - { - get - { - return _line; - } - set - { - _line = value; - } - } - - public int CharPositionInLine - { - get - { - return _charPositionInLine; - } - set - { - _charPositionInLine = value; - } - } - - public override void GetObjectData(SerializationInfo info, StreamingContext context) - { - if (info == null) - throw new ArgumentNullException("info"); - - base.GetObjectData(info, context); - info.AddValue("Index", _index); - info.AddValue("C", _c); - info.AddValue("Line", _line); - info.AddValue("CharPositionInLine", _charPositionInLine); - info.AddValue("ApproximateLineInfo", _approximateLineInfo); - } - - protected virtual void ExtractInformationFromTreeNodeStream(ITreeNodeStream input) - { - this._node = input.LT(1); - - object positionNode = null; - IPositionTrackingStream positionTrackingStream = input as IPositionTrackingStream; - if (positionTrackingStream != null) - { - positionNode = positionTrackingStream.GetKnownPositionElement(false); - if (positionNode == null) - { - positionNode = positionTrackingStream.GetKnownPositionElement(true); - this._approximateLineInfo = positionNode != null; - } - } - - ITokenStreamInformation streamInformation = input as ITokenStreamInformation; - if (streamInformation != null) - { - IToken lastToken = streamInformation.LastToken; - IToken lastRealToken = streamInformation.LastRealToken; - if (lastRealToken != null) - { - this._token = lastRealToken; - this._line = lastRealToken.Line; - this._charPositionInLine = lastRealToken.CharPositionInLine; - this._approximateLineInfo = lastRealToken.Equals(lastToken); - } - } - else - { - ITreeAdaptor adaptor = input.TreeAdaptor; - IToken payload = adaptor.GetToken(positionNode ?? _node); - if (payload != null) - { - this._token = payload; - if (payload.Line <= 0) - { - // imaginary node; no line/pos info; scan backwards - int i = -1; - object priorNode = input.LT(i); - while (priorNode != null) - { - IToken priorPayload = adaptor.GetToken(priorNode); - if (priorPayload != null && priorPayload.Line > 0) - { - // we found the most recent real line / pos info - this._line = priorPayload.Line; - this._charPositionInLine = priorPayload.CharPositionInLine; - this._approximateLineInfo = true; - break; - } - - --i; - try - { - priorNode = input.LT(i); - } - catch (NotSupportedException) - { - priorNode = null; - } - } - } - else - { - // node created from real token - this._line = payload.Line; - this._charPositionInLine = payload.CharPositionInLine; - } - } - else if (this._node is Tree.ITree) - { - this._line = ((Tree.ITree)this._node).Line; - this._charPositionInLine = ((Tree.ITree)this._node).CharPositionInLine; - if (this._node is CommonTree) - { - this._token = ((CommonTree)this._node).Token; - } - } - else - { - int type = adaptor.GetType(this._node); - string text = adaptor.GetText(this._node); - this._token = new CommonToken(type, text); - } - } - } - - protected virtual void ExtractInformationFromTreeNodeStream(ITreeNodeStream input, int k) - { - int mark = input.Mark(); - try - { - for (int i = 0; i < k - 1; i++) - input.Consume(); - - ExtractInformationFromTreeNodeStream(input); - } - finally - { - input.Rewind(mark); - } - } - } -} |