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/*
 * Copyright (C) 2009-2011 Mathias Doenitz
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.parboiled.matchers;

public final class MatcherUtils {
    
    private MatcherUtils() {}
    
    public static Matcher unwrap(Matcher matcher) {
        if (matcher instanceof ProxyMatcher) return unwrap(ProxyMatcher.unwrap(matcher));
        if (matcher instanceof VarFramingMatcher) return unwrap(VarFramingMatcher.unwrap(matcher));
        if (matcher instanceof MemoMismatchesMatcher) return unwrap(MemoMismatchesMatcher.unwrap(matcher));
        return matcher; 
    }
}