package com.google.common.base;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkPositionIndex;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.VisibleForTesting;
import com.google.errorprone.annotations.InlineMe;

   * @throws IllegalArgumentException if {@code size} is negative
   */
  @CanIgnoreReturnValue
  public static int checkPositionIndex(int index, int size) {
    return checkPositionIndex(index, size, "index");
  }

  /**
   * Ensures that {@code index} specifies a valid <i>position</i> in an array, list or string of

   */
  static <T extends @Nullable Object> UnmodifiableListIterator<T> forArrayWithPosition(
      T[] array, int position) {
    if (array.length == 0) {
      Preconditions.checkPositionIndex(position, array.length); // otherwise checked in ArrayItr
      return emptyListIterator();
    }
    return new ArrayItr<>(array, position);
  }