- Add is_unsigned trait

- Add make_unsigned for 128 bit integers
- Fix is_scalar traits

include/boost/move/detail/type_traits.hpp

@@ -581,6 +581,28 @@ struct remove_cvref
 {
 };
 
+//////////////////////////
+//    is_unsigned
+//////////////////////////
+template<class T> struct is_unsigned_cv               { static const bool value = true; };
+template <>       struct is_unsigned_cv<signed char>  { static const bool value = false; };
+template <>       struct is_unsigned_cv<signed short> { static const bool value = false; };
+template <>       struct is_unsigned_cv<signed int>   { static const bool value = false; };
+template <>       struct is_unsigned_cv<signed long>  { static const bool value = false; };
+#ifdef BOOST_HAS_LONG_LONG
+template <>       struct is_unsigned_cv< ::boost::long_long_type > { static const bool value = false; };
+#endif
+
+#ifdef BOOST_HAS_INT128
+template <>       struct is_unsigned_cv< ::boost::int128_type >    { static const bool value = false; };
+#endif
+
+template <class T>
+struct is_unsigned
+   : is_unsigned_cv<typename remove_cv<T>::type>
+{};
+
+
 //////////////////////////
 //    make_unsigned
 //////////////////////////
@@ -594,6 +616,11 @@ template <> struct make_unsigned_impl<signed long>                {  typedef uns
 template <> struct make_unsigned_impl< ::boost::long_long_type >  {  typedef ::boost::ulong_long_type type; };
 #endif
 
+#ifdef BOOST_HAS_INT128
+template <> struct make_unsigned_impl< ::boost::int128_type > { typedef ::boost::uint128_type type; };
+#endif
+
+
 template <class T>
 struct make_unsigned
    : make_unsigned_impl<typename remove_cv<T>::type>
@@ -639,6 +666,13 @@ template<> struct is_integral_cv<            unsigned long>{  static const bool
 template<> struct is_integral_cv< ::boost:: long_long_type>{  static const bool value = true; };
 template<> struct is_integral_cv< ::boost::ulong_long_type>{  static const bool value = true; };
 #endif
+#ifdef BOOST_HAS_INT128
+template <> struct is_integral_cv< ::boost::int128_type >  {  static const bool value = true; };
+template <> struct is_integral_cv< ::boost::uint128_type > {  static const bool value = true; };
+#endif
+#if defined(__cpp_char8_t) && __cpp_char8_t >= 201811L
+template<> struct is_integral_cv<char8_t>  { static const bool value = true; };
+#endif
 
 template<class T>
 struct is_integral
@@ -660,13 +694,6 @@ template <class T, std::size_t N>
 struct remove_all_extents<T[N]>
 {  typedef typename remove_all_extents<T>::type type;};
 
-//////////////////////////
-//    is_scalar
-//////////////////////////
-template<class T>
-struct is_scalar
-{  static const bool value = is_integral<T>::value || is_floating_point<T>::value; };
-
 //////////////////////////
 //       is_void
 //////////////////////////
@@ -732,6 +759,11 @@ struct is_nullptr_t
    : is_nullptr_t_cv<typename remove_cv<T>::type>
 {};
 
+template <class T>
+struct is_null_pointer
+   : is_nullptr_t_cv<typename remove_cv<T>::type>
+{};
+
 //////////////////////////////////////
 //          is_function
 //////////////////////////////////////
@@ -802,6 +834,7 @@ struct is_arithmetic
                              is_integral<T>::value;
 };
 
+
 //////////////////////////////////////
 //    is_member_function_pointer
 //////////////////////////////////////
@@ -843,7 +876,24 @@ struct is_enum_nonintrinsic
 
 template <class T>
 struct is_enum
-{  static const bool value = BOOST_MOVE_IS_ENUM_IMPL(T);  };
+{
+   static const bool value = BOOST_MOVE_IS_ENUM_IMPL(T);
+};
+
+
+//////////////////////////
+//    is_scalar
+//////////////////////////
+template<class T>
+struct is_scalar
+{
+   static const bool value = is_arithmetic<T>::value ||
+      is_enum<T>::value ||
+      is_pointer<T>::value ||
+      is_member_pointer<T>::value ||
+      is_null_pointer<T>::value;
+};
+
 
 //////////////////////////////////////
 //       is_pod