/*
 *  This file is part of the X10 project (http://x10-lang.org).
 *
 *  This file is licensed to You under the Eclipse Public License (EPL);
 *  You may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *      http://www.opensource.org/licenses/eclipse-1.0.php
 *
 * This file was originally derived from the Polyglot extensible compiler framework.
 *
 *  (C) Copyright 2000-2007 Polyglot project group, Cornell University
 *  (C) Copyright IBM Corporation 2007-2012.
 */

package polyglot.ast;

import polyglot.types.SemanticException;
import polyglot.util.Position;
import polyglot.visit.ContextVisitor;

/**
 * Utility class which is used to disambiguate ambiguous
 * AST nodes (Expr, Type, Receiver, Qualifier, Prefix).
 */
public interface Disamb
{
    /**
     * Disambiguate the prefix and name into a unambiguous node of the
     * appropriate type.
     * @return An unambiguous AST node, or null if disambiguation fails.
     */
    Node disambiguate(Ambiguous amb, ContextVisitor v, Position pos,
            Node prefix, Id name) throws SemanticException;
}