From 8fb468e708e67f457c079a88a1ab2a15b7d865ee Mon Sep 17 00:00:00 2001
From: John Wellbelove <github@wellbelove.co.uk>
Date: Wed, 15 May 2019 22:17:53 +0100
Subject: [PATCH 1/2] Added size_of<>

---
 include/etl/type_traits.h | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/include/etl/type_traits.h b/include/etl/type_traits.h
index ee01e614..f75fb0f1 100644
--- a/include/etl/type_traits.h
+++ b/include/etl/type_traits.h
@@ -335,7 +335,7 @@ namespace etl
   struct conditional_integral_constant<false, T, TRUE_VALUE, FALSE_VALUE>
   {
     ETL_STATIC_ASSERT(etl::is_integral<T>::value, "Not an integral type");
-    static const T value = FALSE_VALUE; 
+    static const T value = FALSE_VALUE;
   };
 
   /// make_signed
@@ -485,14 +485,14 @@ namespace etl
   ///\ingroup types
   //***************************************************************************
   template <typename T,
-            typename T1, typename T2 = void, typename T3 = void, typename T4 = void, 
-            typename T5 = void, typename T6 = void, typename T7 = void, typename T8 = void, 
-            typename T9 = void, typename T10 = void, typename T11 = void, typename T12 = void, 
-            typename T13 = void, typename T14 = void, typename T15 = void, typename T16 = void, 
+            typename T1, typename T2 = void, typename T3 = void, typename T4 = void,
+            typename T5 = void, typename T6 = void, typename T7 = void, typename T8 = void,
+            typename T9 = void, typename T10 = void, typename T11 = void, typename T12 = void,
+            typename T13 = void, typename T14 = void, typename T15 = void, typename T16 = void,
             typename T17 = void>
   struct is_one_of
   {
-    static const bool value = 
+    static const bool value =
         etl::is_same<T, T1>::value ||
         etl::is_same<T, T2>::value ||
         etl::is_same<T, T3>::value ||
@@ -586,6 +586,21 @@ namespace etl
     typedef const type_t*       const_pointer;
     typedef const type_t* const const_pointer_const;
   };
+
+  //***************************************************************************
+  // size_of
+  //***************************************************************************
+  template <typename T>
+  struct size_of
+  {
+    static const size_t size = sizeof(T);
+  };
+
+  template <>
+  struct size_of<void>
+  {
+    static const size_t size = 1;
+  };
 }
 
 #endif

From e3fa5b912c68ff5e90cbce214b8906cfcbbf77c5 Mon Sep 17 00:00:00 2001
From: John Wellbelove <github@wellbelove.co.uk>
Date: Wed, 15 May 2019 22:31:30 +0100
Subject: [PATCH 2/2] Added size_of<>

---
 include/etl/type_traits_generator.h | 15 +++++++++++++++
 test/test_type_traits.cpp           | 24 ++++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/include/etl/type_traits_generator.h b/include/etl/type_traits_generator.h
index 83b982bd..a48a78c6 100644
--- a/include/etl/type_traits_generator.h
+++ b/include/etl/type_traits_generator.h
@@ -598,6 +598,21 @@ namespace etl
     typedef const type_t*       const_pointer;
     typedef const type_t* const const_pointer_const;
   };
+
+  //***************************************************************************
+  // size_of
+  //***************************************************************************
+  template <typename T>
+  struct size_of
+  {
+    static const size_t size = sizeof(T);
+  };
+
+  template <>
+  struct size_of<void>
+  {
+    static const size_t size = 1;
+  };
 }
 
 #endif
diff --git a/test/test_type_traits.cpp b/test/test_type_traits.cpp
index 4ef72f27..e1aba926 100644
--- a/test/test_type_traits.cpp
+++ b/test/test_type_traits.cpp
@@ -41,6 +41,20 @@ namespace std
 #include "etl/type_traits.h"
 #include <type_traits>
 
+namespace
+{
+  struct TestData { };
+}
+
+namespace etl
+{
+  template <>
+  struct etl::size_of<TestData>
+  {
+    static const size_t size = 20;
+  };
+}
+
 namespace
 {
   // A class to test non-fundamental types.
@@ -728,4 +742,14 @@ namespace
     CHECK_EQUAL(1, v1);
     CHECK_EQUAL(2, v2);
   }
+
+  //*************************************************************************
+  TEST(size_of)
+  {
+    CHECK_EQUAL(1, etl::size_of<void>::size);
+    CHECK_EQUAL(1, etl::size_of<char>::size);
+    CHECK_EQUAL(2, etl::size_of<short>::size);
+    CHECK_EQUAL(4, etl::size_of<int>::size);
+    CHECK_EQUAL(20, etl::size_of<TestData>::size);
+  }
 }