Merge pull request #19 from pauci/feature/date-interval-interface

feat: Introduce DateIntervalInterface

src/DateInterval.php

@@ -4,7 +4,7 @@
 
 namespace Pauci\DateTime;
 
-class DateInterval extends \DateInterval implements \JsonSerializable, \Stringable
+class DateInterval extends \DateInterval implements DateIntervalInterface
 {
     /**
      * @throws \Exception

src/DateIntervalInterface.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pauci\DateTime;
+
+interface DateIntervalInterface extends \Stringable, \JsonSerializable
+{
+    public function toString(): string;
+}

src/DateTimeInterface.php

@@ -6,8 +6,6 @@
 
 interface DateTimeInterface extends \DateTimeInterface, \Stringable, \JsonSerializable
 {
-    public function diff(\DateTimeInterface $targetObject, bool $absolute = false): DateInterval;
-
     public function equals(self $dateTime): bool;
 
     public function inDefaultTimezone(): static;