--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/regexp/joni/ast/ConsAltNode.java	2020-04-15 18:51:52.000000000 +0530
+++ /dev/null	2020-04-15 18:51:52.000000000 +0530
@@ -1,157 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni.ast;
-
-import java.util.Set;
-import jdk.nashorn.internal.runtime.regexp.joni.WarnCallback;
-import jdk.nashorn.internal.runtime.regexp.joni.exception.ErrorMessages;
-import jdk.nashorn.internal.runtime.regexp.joni.exception.InternalException;
-
-@SuppressWarnings("javadoc")
-public final class ConsAltNode extends Node {
-    public Node car;
-    public ConsAltNode cdr;
-    private int type;           // List or Alt
-
-    private ConsAltNode(final Node car, final ConsAltNode cdr, final int type) {
-        this.car = car;
-        if (car != null) {
-            car.parent = this;
-        }
-        this.cdr = cdr;
-        if (cdr != null) {
-            cdr.parent = this;
-        }
-
-        this.type = type;
-    }
-
-    public static ConsAltNode newAltNode(final Node left, final ConsAltNode right) {
-        return new ConsAltNode(left, right, ALT);
-    }
-
-    public static ConsAltNode newListNode(final Node left, final ConsAltNode right) {
-        return new ConsAltNode(left, right, LIST);
-    }
-
-    public static ConsAltNode listAdd(final ConsAltNode listp, final Node x) {
-        final ConsAltNode n = newListNode(x, null);
-        ConsAltNode list = listp;
-
-        if (list != null) {
-            while (list.cdr != null) {
-                list = list.cdr;
-            }
-            list.setCdr(n);
-        }
-        return n;
-    }
-
-    public void toListNode() {
-        type = LIST;
-    }
-
-    public void toAltNode() {
-        type = ALT;
-    }
-
-    @Override
-    public int getType() {
-        return type;
-    }
-
-    @Override
-    protected void setChild(final Node newChild) {
-        car = newChild;
-    }
-
-    @Override
-    protected Node getChild() {
-        return car;
-    }
-
-    @Override
-    public void swap(final Node with) {
-        if (cdr != null) {
-            cdr.parent = with;
-            if (with instanceof ConsAltNode) {
-                final ConsAltNode withCan = (ConsAltNode)with;
-                withCan.cdr.parent = this;
-                final ConsAltNode tmp = cdr;
-                cdr = withCan.cdr;
-                withCan.cdr = tmp;
-            }
-        }
-        super.swap(with);
-    }
-
-    @Override
-    public void verifyTree(final Set<Node> set, final WarnCallback warnings) {
-        if (!set.contains(this)) {
-            set.add(this);
-            if (car != null) {
-                if (car.parent != this) {
-                    warnings.warn("broken list car: " + this.getAddressName() + " -> " +  car.getAddressName());
-                }
-                car.verifyTree(set,warnings);
-            }
-            if (cdr != null) {
-                if (cdr.parent != this) {
-                    warnings.warn("broken list cdr: " + this.getAddressName() + " -> " +  cdr.getAddressName());
-                }
-                cdr.verifyTree(set,warnings);
-            }
-        }
-    }
-
-    public Node setCar(final Node ca) {
-        car = ca;
-        ca.parent = this;
-        return car;
-    }
-
-    public ConsAltNode setCdr(final ConsAltNode cd) {
-        cdr = cd;
-        cd.parent = this;
-        return cdr;
-    }
-
-    @Override
-    public String getName() {
-        switch (type) {
-        case ALT:
-            return "Alt";
-        case LIST:
-            return "List";
-        default:
-            throw new InternalException(ErrorMessages.ERR_PARSER_BUG);
-        }
-    }
-
-    @Override
-    public String toString(final int level) {
-        final StringBuilder value = new StringBuilder();
-        value.append("\n  car: ").append(pad(car, level + 1));
-        value.append("\n  cdr: ").append(cdr == null ? "NULL" : cdr.toString());
-
-        return value.toString();
-    }
-
-}