From 67aa8efd5a55d512a8fdf2ab43069cfdabecc26e Mon Sep 17 00:00:00 2001
From: Benoit Blanchon <git@benoitblanchon.fr>
Date: Sun, 23 Aug 2020 09:29:40 +0200
Subject: [PATCH] Added a build failure when nullptr is defined as a macro
 (closes #1355)

---
 CHANGELOG.md                      | 5 +++++
 src/ArduinoJson/Configuration.hpp | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2fa203e8..05f1b1bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 ArduinoJson: change log
 =======================
 
+HEAD
+----
+
+* Added a build failure when nullptr is defined as a macro (issue #1355)
+
 v6.16.1 (2020-08-04)
 -------
 
diff --git a/src/ArduinoJson/Configuration.hpp b/src/ArduinoJson/Configuration.hpp
index acf6276b..42ba498e 100644
--- a/src/ArduinoJson/Configuration.hpp
+++ b/src/ArduinoJson/Configuration.hpp
@@ -230,3 +230,8 @@
 #define ARDUINOJSON_DEBUG 0
 #endif
 #endif
+
+#if ARDUINOJSON_HAS_NULLPTR && defined(nullptr)
+#error nullptr is defined as a macro. Remove the faulty #define or #undef nullptr
+// See https://github.com/bblanchon/ArduinoJson/issues/1355
+#endif