From 6ed87029e26efcfdf7904cec5cc053a567416a8e Mon Sep 17 00:00:00 2001
From: Benoit Blanchon <git@benoitblanchon.fr>
Date: Wed, 6 Dec 2023 17:34:42 +0100
Subject: [PATCH] Fix `no instance of overloaded function...` on IAR (fixes
 #2001)

---
 CHANGELOG.md                               | 1 +
 src/ArduinoJson/Variant/VariantRefBase.hpp | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 88ce9393..7c0b30cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ HEAD
 
 * Fix error `'std::string' has not been declared` (issue #1967)
 * Fix error `'std::string_view' has not been declared` (issue #1967)
+* Fix error `no instance of overloaded function...` on recent IAR compilers (issue #2001)
 
 v6.21.3 (2023-07-23)
 -------
diff --git a/src/ArduinoJson/Variant/VariantRefBase.hpp b/src/ArduinoJson/Variant/VariantRefBase.hpp
index 2afdda6a..321aca09 100644
--- a/src/ArduinoJson/Variant/VariantRefBase.hpp
+++ b/src/ArduinoJson/Variant/VariantRefBase.hpp
@@ -61,7 +61,8 @@ class VariantRefBase : public VariantTag {
     return Converter<T>::fromJson(getVariant());
   }
 
-  template <typename T>
+  template <typename T,
+            typename = typename enable_if<!is_same<T, TDerived>::value>::type>
   FORCE_INLINE operator T() const {
     return as<T>();
   }