<?php
  
  /**
   * This file is part of the Carbon package.
   *
   * (c) Brian Nesbitt <brian@nesbot.com>
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  namespace Carbon\Traits;
  
  use Carbon\Carbon;
  use Carbon\CarbonImmutable;
  
  /**
   * Trait Mutability.
   *
   * Utils to know if the current object is mutable or immutable and convert it.
   */
  trait Mutability
  {
      use Cast;
  
      /**
       * Returns true if the current class/instance is mutable.
       *
       * @return bool
       */
      public static function isMutable()
      {
          return false;
      }
  
      /**
       * Returns true if the current class/instance is immutable.
       *
       * @return bool
       */
      public static function isImmutable()
      {
          return !static::isMutable();
      }
  
      /**
       * Return a mutable copy of the instance.
       *
       * @return Carbon
       */
      public function toMutable()
      {
          /** @var Carbon $date */
          $date = $this->cast(Carbon::class);
  
          return $date;
      }
  
      /**
       * Return a immutable copy of the instance.
       *
       * @return CarbonImmutable
       */
      public function toImmutable()
      {
          /** @var CarbonImmutable $date */
          $date = $this->cast(CarbonImmutable::class);
  
          return $date;
      }
  }