From 4f7f97341cf10dcea1eb3654ab3fa0d8f5bcbe7c Mon Sep 17 00:00:00 2001
From: Derek Stephen McLean <delboy1978uk@gmail.com>
Date: Wed, 14 Feb 2018 13:01:32 +0100
Subject: [PATCH] feature/537 Object __toString() in public static function
 isNonEmptyString($value)

---
 src/Spout/Writer/Common/Helper/CellHelper.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Spout/Writer/Common/Helper/CellHelper.php b/src/Spout/Writer/Common/Helper/CellHelper.php
index 50ead93..1caf811 100644
--- a/src/Spout/Writer/Common/Helper/CellHelper.php
+++ b/src/Spout/Writer/Common/Helper/CellHelper.php
@@ -61,6 +61,9 @@ class CellHelper
      */
     public static function isNonEmptyString($value)
     {
+        if (is_object($value) && method_exists($value, '__toString')) {
+            $value = $value->__toString();
+        }
         return (gettype($value) === 'string' && $value !== '');
     }