116 lines
4.3 KiB
C#
116 lines
4.3 KiB
C#
/*
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* [The "BSD licence"]
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* Copyright (c) 2005-2008 Terence Parr
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* All rights reserved.
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*
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* Conversion to C#:
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* Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace Antlr.Runtime.Debug {
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using Antlr.Runtime.JavaExtensions;
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using Console = System.Console;
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using IOException = System.IO.IOException;
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public class DebugParser : Parser {
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/** <summary>Who to notify when events in the parser occur.</summary> */
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public IDebugEventListener dbg = null;
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/** <summary>
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* Used to differentiate between fixed lookahead and cyclic DFA decisions
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* while profiling.
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* </summary>
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*/
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public bool isCyclicDecision = false;
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/** <summary>
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* Create a normal parser except wrap the token stream in a debug
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* proxy that fires consume events.
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* </summary>
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*/
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public DebugParser(ITokenStream input, IDebugEventListener dbg, RecognizerSharedState state)
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: base(input is DebugTokenStream ? input : new DebugTokenStream(input, dbg), state) {
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SetDebugListener(dbg);
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}
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public DebugParser(ITokenStream input, RecognizerSharedState state)
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: base(input is DebugTokenStream ? input : new DebugTokenStream(input, null), state) {
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}
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public DebugParser(ITokenStream input, IDebugEventListener dbg)
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: this(input is DebugTokenStream ? input : new DebugTokenStream(input, dbg), dbg, null) {
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}
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public override IDebugEventListener DebugListener {
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get {
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return dbg;
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}
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}
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/** <summary>
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* Provide a new debug event listener for this parser. Notify the
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* input stream too that it should send events to this listener.
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* </summary>
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*/
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public virtual void SetDebugListener(IDebugEventListener value) {
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DebugTokenStream debugTokenStream = input as DebugTokenStream;
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if (debugTokenStream != null)
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debugTokenStream.DebugListener = value;
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dbg = value;
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}
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public virtual void ReportError(IOException e) {
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Console.Error.WriteLine(e);
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ExceptionExtensions.PrintStackTrace(e, Console.Error);
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}
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public override void BeginResync() {
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dbg.BeginResync();
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base.BeginResync();
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}
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public override void EndResync() {
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dbg.EndResync();
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base.EndResync();
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}
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public virtual void BeginBacktrack(int level) {
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dbg.BeginBacktrack(level);
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}
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public virtual void EndBacktrack(int level, bool successful) {
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dbg.EndBacktrack(level, successful);
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}
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public override void ReportError(RecognitionException e) {
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base.ReportError(e);
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dbg.RecognitionException(e);
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}
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}
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}
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