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/*
* [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;
public class DebugParser : Parser
{
/** <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 DebugParser( ITokenStream input, IDebugEventListener dbg, RecognizerSharedState state )
: base( input is DebugTokenStream ? input : new DebugTokenStream( input, dbg ), state )
{
SetDebugListener(dbg);
}
public DebugParser( ITokenStream input, RecognizerSharedState state )
: base( input is DebugTokenStream ? input : new DebugTokenStream( input, null ), state )
{
}
public DebugParser( ITokenStream input, IDebugEventListener dbg )
: this( input is DebugTokenStream ? input : new DebugTokenStream( 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)
{
DebugTokenStream debugTokenStream = input as DebugTokenStream;
if (debugTokenStream != null)
debugTokenStream.DebugListener = value;
dbg = value;
}
public virtual void ReportError( IOException e )
{
Console.Error.WriteLine( e );
ExceptionExtensions.PrintStackTrace( e, Console.Error );
}
public override void BeginResync()
{
dbg.BeginResync();
base.BeginResync();
}
public override void EndResync()
{
dbg.EndResync();
base.EndResync();
}
public virtual void BeginBacktrack( int level )
{
dbg.BeginBacktrack( level );
}
public virtual void EndBacktrack( int level, bool successful )
{
dbg.EndBacktrack( level, successful );
}
public override void ReportError( RecognitionException e )
{
base.ReportError(e);
dbg.RecognitionException( e );
}
}
}
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