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The latte-lang compiler project, which contains compiler and runtime required library.

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package lt.compiler.util;

import java.util.AbstractList;
import java.util.List;

/**
 * bind 2 lists into one
 */
public class BindList extends AbstractList {
        private final List list1;
        private final List list2;

        public BindList(List list1, List list2) {
                this.list1 = list1;
                this.list2 = list2;
        }

        @Override
        public E get(int index) {
                if (index < 0 || index >= list1.size() + list2.size())
                        throw new IndexOutOfBoundsException(String.valueOf(index));
                if (index < list1.size()) return list1.get(index);
                index -= list1.size();
                return list2.get(index);
        }

        @Override
        public E set(int index, E element) {
                if (index < 0 || index >= list1.size() + list2.size())
                        throw new IndexOutOfBoundsException(String.valueOf(index));
                if (index < list1.size()) return list1.set(index, element);
                index -= list1.size();
                return list2.set(index, element);
        }

        @Override
        public int size() {
                return list1.size() + list2.size();
        }
}