Fix no instance of overloaded function... on IAR (fixes #2001)

bblanchon · Dec 6, 2023 · 6ed8702 · 6ed8702
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diff --git 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
@@ -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>();
   }