/*
 * [The "BSD license"]
 *  Copyright (c) 2010 Terence Parr
 *  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.
 */
package org.antlr.tool;

Defines behavior of object able to handle error messages from ANTLR including
 both tool errors like "can't write file" and grammar ambiguity warnings.
 To avoid having to change tools that use ANTLR (like GUIs), I am
 wrapping error data in Message objects and passing them to the listener.
 In this way, users of this interface are less sensitive to changes in
 the info I need for error messages.
/** Defines behavior of object able to handle error messages from ANTLR including
 *  both tool errors like "can't write file" and grammar ambiguity warnings.
 *  To avoid having to change tools that use ANTLR (like GUIs), I am
 *  wrapping error data in Message objects and passing them to the listener.
 *  In this way, users of this interface are less sensitive to changes in
 *  the info I need for error messages.
 */
public interface ANTLRErrorListener {
	public void info(String msg);
	public void error(Message msg);
	public void warning(Message msg);
	public void error(ToolMessage msg);
}