From 6447520b5b116178fe0272558508b657d3af962a Mon Sep 17 00:00:00 2001
From: Benoit Blanchon <git@benoitblanchon.fr>
Date: Tue, 22 Nov 2022 18:56:42 +0100
Subject: [PATCH] Replace `Yes`/`No` with `int`/`char`

---
 src/ArduinoJson/Polyfills/type_traits/is_base_of.hpp     | 9 +++------
 src/ArduinoJson/Polyfills/type_traits/is_class.hpp       | 9 +++------
 src/ArduinoJson/Polyfills/type_traits/is_convertible.hpp | 9 +++------
 src/ArduinoJson/Variant/ConverterImpl.hpp                | 9 +++------
 src/ArduinoJson/Variant/VariantAttorney.hpp              | 9 +++------
 5 files changed, 15 insertions(+), 30 deletions(-)

diff --git a/src/ArduinoJson/Polyfills/type_traits/is_base_of.hpp b/src/ArduinoJson/Polyfills/type_traits/is_base_of.hpp
index 1583fd52..8936bd9b 100644
--- a/src/ArduinoJson/Polyfills/type_traits/is_base_of.hpp
+++ b/src/ArduinoJson/Polyfills/type_traits/is_base_of.hpp
@@ -13,14 +13,11 @@ namespace ARDUINOJSON_NAMESPACE {
 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(...);
+  static int probe(const TBase*);
+  static char probe(...);
 
  public:
   static const bool value =
-      sizeof(probe(reinterpret_cast<TDerived*>(0))) == sizeof(Yes);
+      sizeof(probe(reinterpret_cast<TDerived*>(0))) == sizeof(int);
 };
 }  // namespace ARDUINOJSON_NAMESPACE
diff --git a/src/ArduinoJson/Polyfills/type_traits/is_class.hpp b/src/ArduinoJson/Polyfills/type_traits/is_class.hpp
index 06f97cab..a586c3c5 100644
--- a/src/ArduinoJson/Polyfills/type_traits/is_class.hpp
+++ b/src/ArduinoJson/Polyfills/type_traits/is_class.hpp
@@ -11,16 +11,13 @@ namespace ARDUINOJSON_NAMESPACE {
 template <typename T>
 struct is_class {
  protected:  // <- to avoid GCC's "all member functions in class are private"
-  typedef char Yes[1];
-  typedef char No[2];
-
   template <typename U>
-  static Yes& probe(void (U::*)(void));
+  static int probe(void (U::*)(void));
   template <typename>
-  static No& probe(...);
+  static char probe(...);
 
  public:
-  static const bool value = sizeof(probe<T>(0)) == sizeof(Yes);
+  static const bool value = sizeof(probe<T>(0)) == sizeof(int);
 };
 
 }  // namespace ARDUINOJSON_NAMESPACE
diff --git a/src/ArduinoJson/Polyfills/type_traits/is_convertible.hpp b/src/ArduinoJson/Polyfills/type_traits/is_convertible.hpp
index 2d3ef4b7..ef18cf24 100644
--- a/src/ArduinoJson/Polyfills/type_traits/is_convertible.hpp
+++ b/src/ArduinoJson/Polyfills/type_traits/is_convertible.hpp
@@ -24,16 +24,13 @@ namespace ARDUINOJSON_NAMESPACE {
 template <typename From, typename To>
 struct is_convertible {
  protected:  // <- to avoid GCC's "all member functions in class are private"
-  typedef char Yes[1];
-  typedef char No[2];
-
-  static Yes& probe(To);
-  static No& probe(...);
+  static int probe(To);
+  static char probe(...);
 
   static From& _from;
 
  public:
-  static const bool value = sizeof(probe(_from)) == sizeof(Yes);
+  static const bool value = sizeof(probe(_from)) == sizeof(int);
 };
 
 }  // namespace ARDUINOJSON_NAMESPACE
diff --git a/src/ArduinoJson/Variant/ConverterImpl.hpp b/src/ArduinoJson/Variant/ConverterImpl.hpp
index 60d3ea4c..888cfed7 100644
--- a/src/ArduinoJson/Variant/ConverterImpl.hpp
+++ b/src/ArduinoJson/Variant/ConverterImpl.hpp
@@ -307,15 +307,12 @@ inline bool canConvertFromJson(VariantConstRef src, const std::string_view&) {
 template <typename T>
 struct ConverterNeedsWriteableRef {
  protected:  // <- to avoid GCC's "all member functions in class are private"
-  typedef char Yes[1];
-  typedef char No[2];
-
-  static Yes& probe(T (*f)(VariantRef));
-  static No& probe(T (*f)(VariantConstRef));
+  static int probe(T (*f)(VariantRef));
+  static char probe(T (*f)(VariantConstRef));
 
  public:
   static const bool value =
-      sizeof(probe(Converter<T>::fromJson)) == sizeof(Yes);
+      sizeof(probe(Converter<T>::fromJson)) == sizeof(int);
 };
 
 }  // namespace ARDUINOJSON_NAMESPACE
diff --git a/src/ArduinoJson/Variant/VariantAttorney.hpp b/src/ArduinoJson/Variant/VariantAttorney.hpp
index ebb7d879..7994fc8a 100644
--- a/src/ArduinoJson/Variant/VariantAttorney.hpp
+++ b/src/ArduinoJson/Variant/VariantAttorney.hpp
@@ -17,16 +17,13 @@ class VariantAttorney {
   template <typename TClient>
   struct ResultOfGetData {
    protected:  // <- to avoid GCC's "all member functions in class are private"
-    typedef char Yes[1];
-    typedef char No[2];
-
-    static Yes& probe(const VariantData*);
-    static No& probe(VariantData*);
+    static int probe(const VariantData*);
+    static char probe(VariantData*);
 
     static TClient& client;
 
    public:
-    typedef typename conditional<sizeof(probe(client.getData())) == sizeof(Yes),
+    typedef typename conditional<sizeof(probe(client.getData())) == sizeof(int),
                                  const VariantData*, VariantData*>::type type;
   };