From 56aa94c61e1cb47271aa02c5be99b7945a7010ea Mon Sep 17 00:00:00 2001
From: "Kevin B. McCarty" <kmccarty@gmail.com>
Date: Sat, 9 May 2015 19:28:04 +0200
Subject: [PATCH] Allow using wxDateTime::operator==() and !=() with invalid
 objects

Unlike the other operators, we comparing for equality has a well-defined
semantics even for invalid objects, so there doesn't seem any reason to not
allow it.
---
 include/wx/datetime.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/wx/datetime.h b/include/wx/datetime.h
index 6375f06a1a..c3cedad7a4 100644
--- a/include/wx/datetime.h
+++ b/include/wx/datetime.h
@@ -836,12 +836,15 @@ public:
 
     inline bool operator==(const wxDateTime& dt) const
     {
-        return GetValue() == dt.GetValue();
+        // Intentionally do not call GetValue() here, in order that
+        // invalid wxDateTimes may be compared for equality
+        return m_time == dt.m_time;
     }
 
     inline bool operator!=(const wxDateTime& dt) const
     {
-        return GetValue() != dt.GetValue();
+        // As above, don't use GetValue() here.
+        return m_time != dt.m_time;
     }
 
     // arithmetics with dates (see also below for more operators)