From e370cf93bfe24d9cce7b7153605842c42b9a0b7c Mon Sep 17 00:00:00 2001
From: smhg <sam.hauglustaine@gmail.com>
Date: Fri, 1 Mar 2019 11:50:01 +0100
Subject: [PATCH] support DateTimeImmutable

---
 src/Timespan/Timespan.php | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/Timespan/Timespan.php b/src/Timespan/Timespan.php
index 43d830c..eae03a5 100644
--- a/src/Timespan/Timespan.php
+++ b/src/Timespan/Timespan.php
@@ -1,7 +1,7 @@
 <?php
 namespace Timespan;
 
-use \DateTime;
+use \DateTimeInterface;
 use \DateInterval;
 use \DatePeriod;
 
@@ -10,7 +10,7 @@ class Timespan
     public $start;
     public $end;
 
-    public function __construct(DateTime $start, DateTime $end)
+    public function __construct(DateTimeInterface $start, DateTimeInterface $end)
     {
         $this->start = $start;
         $this->end = $end;
@@ -19,10 +19,10 @@ public function __construct(DateTime $start, DateTime $end)
     /**
      * Check whether timespan contains a date.
      * Includes start, excludes end (like PHP's DatePeriod)
-     * @param DateTime $date
+     * @param DateTimeInterface $date
      * @return boolean
      */
-    public function contains(DateTime $date)
+    public function contains(DateTimeInterface $date)
     {
         return $this->start <= $date && $date < $this->end;
     }
@@ -100,11 +100,11 @@ public function merge(Timespan $span)
 
     /**
      * Trim timespan to fit within boundaries
-     * @param  DateTime $start
-     * @param  DateTime $end
+     * @param  DateTimeInterface $start
+     * @param  DateTimeInterface $end
      * @return Timespan|null A new, trimmed, timespan or `null` if nothing remains
      */
-    public function trim(DateTime $start, DateTime $end)
+    public function trim(DateTimeInterface $start, DateTimeInterface $end)
     {
         $trimmed = clone $this;