Added licence text to tuple header

Removed redundant include

include/etl/tuple.h

@@ -1,16 +1,57 @@
-#pragma once
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+https://github.com/ETLCPP/etl
+https://www.etlcpp.com
+
+Documentation: https://www.etlcpp.com/algorithm.html
+
+Copyright(c) 2024 John Wellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef ETL_TUPLE_INCLUDED
+#define ETL_TUPLE_INCLUDED
+
+#include "platform.h"
+
+#if ETL_NOT_USING_CPP11
+  #if !defined(ETL_IN_UNIT_TEST)
+    #error NOT SUPPORTED FOR C++03 OR BELOW
+  #endif
+#else
 
 #if ETL_USING_STL
   #include <tuple>
 #endif
 
-#include "etl/nth_type.h"
-#include "etl/type_traits.h"
-#include "etl/utility.h"
-#include "etl/functional.h"
+#include "nth_type.h"
+#include "type_traits.h"
+#include "utility.h"
+#include "functional.h"
 
-#include "etl/private/tuple_element.h"
-#include "etl/private/tuple_size.h"
+#include "private/tuple_element.h"
+#include "private/tuple_size.h"
 
 namespace etl
 {
@@ -1257,3 +1298,5 @@ namespace std
     using type = typename etl::nth_type_t<I, Types...>;
   };
 }
+#endif
+#endif

test/test_tuple.cpp

@@ -31,7 +31,6 @@ SOFTWARE.
 #include "data.h"
 
 #include "etl/tuple.h"
-#include "etl/private/tuple_size.h"
 
 #include <string>
 #include <tuple>