import ArduinoJson 6.18.0

1 files changed, 26 insertions, 0 deletions

diff --git a/include/lib/ArduinoJson/Polyfills/type_traits/is_base_of.hpp b/include/lib/ArduinoJson/Polyfills/type_traits/is_base_of.hpp
new file mode 100644
index 0000000..32b41cd
--- /dev/null
+++ b/include/lib/ArduinoJson/Polyfills/type_traits/is_base_of.hpp
@@ -0,0 +1,26 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright Benoit Blanchon 2014-2021
+// MIT License
+
+#pragma once
+
+#include <ArduinoJson/Namespace.hpp>
+
+namespace ARDUINOJSON_NAMESPACE {
+
+// A meta-function that returns true if Derived inherits from TBase is an
+// integral type.
+template <typename TBase, typename TDerived>
+class is_base_of {
+ protected:  // <- to avoid GCC's "all member functions in class are private"
+  typedef char Yes[1];
+  typedef char No[2];
+
+  static Yes &probe(const TBase *);
+  static No &probe(...);
+
+ public:
+  static const bool value =
+      sizeof(probe(reinterpret_cast<TDerived *>(0))) == sizeof(Yes);
+};
+}  // namespace ARDUINOJSON_NAMESPACE