xref: /external/antlr/antlr-3.4/runtime/CSharp2/Sources/Antlr3.Runtime/Antlr.Runtime.Debug/BlankDebugEventListener.cs

/*
 * [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 {
    /** <summary>
     *  A blank listener that does nothing; useful for real classes so
     *  they don't have to have lots of blank methods and are less
     *  sensitive to updates to debug interface.
     *  </summary>
     */
    public class BlankDebugEventListener : IDebugEventListener {
        public int RuleLevel {
            get;
            protected set;
        }

        public virtual void Initialize() {
        }

        public virtual void EnterRule(string grammarFileName, string ruleName) {
            if (RuleLevel == 0)
                Commence();
            RuleLevel++;
        }
        public virtual void ExitRule(string grammarFileName, string ruleName) {
            RuleLevel--;
            if (RuleLevel == 0)
                Terminate();
        }
        public virtual void EnterAlt(int alt) {
        }
        public virtual void EnterSubRule(int decisionNumber) {
        }
        public virtual void ExitSubRule(int decisionNumber) {
        }
        public virtual void EnterDecision(int decisionNumber, bool couldBacktrack) {
        }
        public virtual void ExitDecision(int decisionNumber) {
        }
        public virtual void Location(int line, int pos) {
        }
        public virtual void ConsumeToken(IToken token) {
        }
        public virtual void ConsumeHiddenToken(IToken token) {
        }
        public virtual void LT(int i, IToken t) {
        }
        public virtual void Mark(int i) {
        }
        public virtual void Rewind(int i) {
        }
        public virtual void Rewind() {
        }
        public virtual void BeginBacktrack(int level) {
        }
        public virtual void EndBacktrack(int level, bool successful) {
        }
        public virtual void RecognitionException(RecognitionException e) {
        }
        public virtual void BeginResync() {
        }
        public virtual void EndResync() {
        }
        public virtual void SemanticPredicate(bool result, string predicate) {
        }
        public virtual void Commence() {
        }
        public virtual void Terminate() {
        }

        #region Tree parsing stuff

        public virtual void ConsumeNode(object t) {
        }
        public virtual void LT(int i, object t) {
        }

        #endregion


        #region AST Stuff

        public virtual void NilNode(object t) {
        }
        public virtual void ErrorNode(object t) {
        }
        public virtual void CreateNode(object t) {
        }
        public virtual void CreateNode(object node, IToken token) {
        }
        public virtual void BecomeRoot(object newRoot, object oldRoot) {
        }
        public virtual void AddChild(object root, object child) {
        }
        public virtual void SetTokenBoundaries(object t, int tokenStartIndex, int tokenStopIndex) {
        }

        #endregion
    }
}