From e851403482ead11f47bba95660ee086a06045867 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Fournier?= <clement.fournier76@gmail.com>
Date: Fri, 28 Aug 2020 14:49:46 +0200
Subject: [PATCH] Fix compilation

---
 .../net/sourceforge/pmd/util/ConsList.java    | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 pmd-core/src/main/java/net/sourceforge/pmd/util/ConsList.java

diff --git a/pmd-core/src/main/java/net/sourceforge/pmd/util/ConsList.java b/pmd-core/src/main/java/net/sourceforge/pmd/util/ConsList.java
new file mode 100644
index 0000000000..3c3a40f4e0
--- /dev/null
+++ b/pmd-core/src/main/java/net/sourceforge/pmd/util/ConsList.java
@@ -0,0 +1,45 @@
+/*
+ * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
+ */
+
+package net.sourceforge.pmd.util;
+
+import java.util.AbstractList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.apache.commons.lang3.Validate;
+
+import net.sourceforge.pmd.internal.util.IteratorUtil;
+
+final class ConsList<T> extends AbstractList<T> {
+
+    private final List<? extends T> head;
+    private final List<? extends T> tail;
+    private final int size;
+
+    ConsList(List<? extends T> head, List<? extends T> tail) {
+        this.head = head;
+        this.tail = tail;
+        this.size = head.size() + tail.size();
+    }
+
+    @Override
+    public T get(int index) {
+        Validate.validIndex(this, index);
+        if (index < head.size()) {
+            return head.get(index);
+        }
+        return tail.get(index - head.size());
+    }
+
+    @Override
+    public Iterator<T> iterator() {
+        return IteratorUtil.concat(head.iterator(), tail.iterator());
+    }
+
+    @Override
+    public int size() {
+        return size;
+    }
+}