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/*
* Note to JL: Refactored extension methods
*
* [The "BSD licence"]
* Copyright (c) 2005-2008 Terence Parr
* All rights reserved.
*
* Conversion to C#:
* Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
* 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.Debug {
using Antlr.Runtime.JavaExtensions;
using Console = System.Console;
using IOException = System.IO.IOException;
using ITreeNodeStream = Antlr.Runtime.Tree.ITreeNodeStream;
using TreeParser = Antlr.Runtime.Tree.TreeParser;
public class DebugTreeParser : TreeParser {
/** <summary>Who to notify when events in the parser occur.</summary> */
public IDebugEventListener dbg = null;
/** <summary>
* Used to differentiate between fixed lookahead and cyclic DFA decisions
* while profiling.
* </summary>
*/
public bool isCyclicDecision = false;
/** <summary>
* Create a normal parser except wrap the token stream in a debug
* proxy that fires consume events.
* </summary>
*/
public DebugTreeParser(ITreeNodeStream input, IDebugEventListener dbg, RecognizerSharedState state)
: base(input is DebugTreeNodeStream ? input : new DebugTreeNodeStream(input, dbg), state) {
SetDebugListener(dbg);
}
public DebugTreeParser(ITreeNodeStream input, RecognizerSharedState state)
: base(input is DebugTreeNodeStream ? input : new DebugTreeNodeStream(input, null), state) {
}
public DebugTreeParser(ITreeNodeStream input, IDebugEventListener dbg)
: this(input is DebugTreeNodeStream ? input : new DebugTreeNodeStream(input, dbg), dbg, null) {
}
public override IDebugEventListener DebugListener {
get {
return dbg;
}
}
/** <summary>
* Provide a new debug event listener for this parser. Notify the
* input stream too that it should send events to this listener.
* </summary>
*/
public virtual void SetDebugListener(IDebugEventListener value) {
if (input is DebugTreeNodeStream)
((DebugTreeNodeStream)input).DebugListener = value;
this.dbg = value;
}
public virtual void ReportError(IOException e) {
Console.Error.WriteLine(e);
ExceptionExtensions.PrintStackTrace(e, Console.Error);
}
public override void ReportError(RecognitionException e) {
dbg.RecognitionException(e);
}
protected override object GetMissingSymbol(IIntStream input,
RecognitionException e,
int expectedTokenType,
BitSet follow) {
object o = base.GetMissingSymbol(input, e, expectedTokenType, follow);
dbg.ConsumeNode(o);
return o;
}
public override void BeginResync() {
dbg.BeginResync();
}
public override void EndResync() {
dbg.EndResync();
}
public virtual void BeginBacktrack(int level) {
dbg.BeginBacktrack(level);
}
public virtual void EndBacktrack(int level, bool successful) {
dbg.EndBacktrack(level, successful);
}
}
}
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