From 6461094830c68392318ededbf9c8ebfb296483d1 Mon Sep 17 00:00:00 2001
From: John Wellbelove <github@wellbelove.co.uk>
Date: Mon, 21 Oct 2024 09:10:13 +0100
Subject: [PATCH] Modified etl::is_delegate to inherit from etl::bool_constant

---
 include/etl/private/delegate_cpp03.h | 6 +++---
 include/etl/private/delegate_cpp11.h | 5 +----
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/include/etl/private/delegate_cpp03.h b/include/etl/private/delegate_cpp03.h
index 5a1798cb..9e6ca70a 100644
--- a/include/etl/private/delegate_cpp03.h
+++ b/include/etl/private/delegate_cpp03.h
@@ -180,9 +180,8 @@ namespace etl
   /// is_delegate
   //***************************************************************************
   template <typename T>
-  struct is_delegate
+  struct is_delegate : etl::bool_constant<etl::is_base_of<delegate_tag, T>::value>
   {
-    static const bool value = etl::is_base_of<delegate_tag, T>::value;
   };
 
   //*************************************************************************
@@ -192,7 +191,8 @@ namespace etl
   class delegate;
 
   template <typename TReturn, typename TParam>
-  class delegate<TReturn(TParam)> : public private_delegate::call_if_impl<delegate<TReturn(TParam)>, TReturn, TParam>, public delegate_tag
+  class delegate<TReturn(TParam)> : public private_delegate::call_if_impl<delegate<TReturn(TParam)>, TReturn, TParam>, 
+                                    public delegate_tag
   {
   private:
   
diff --git a/include/etl/private/delegate_cpp11.h b/include/etl/private/delegate_cpp11.h
index 1a276bb3..9c566c36 100644
--- a/include/etl/private/delegate_cpp11.h
+++ b/include/etl/private/delegate_cpp11.h
@@ -95,16 +95,13 @@ namespace etl
   /// is_delegate
   //***************************************************************************
   template <typename T>
-  struct is_delegate
+  struct is_delegate : etl::bool_constant<etl::is_base_of<delegate_tag, T>::value>
   {
-    static constexpr bool value = etl::is_base_of<delegate_tag, T>::value;
   };
 
 #if ETL_USING_CPP17
-
   template <typename T>
   inline constexpr bool is_delegate_v = is_delegate<T>::value;
-
 #endif
 
   //*************************************************************************