Fix std::size_t

Author: AntoinePrv

include/xsimd/types/xsimd_batch_constant.hpp

@@ -12,6 +12,8 @@
 #ifndef XSIMD_BATCH_CONSTANT_HPP
 #define XSIMD_BATCH_CONSTANT_HPP
 
+#include <cstddef>
+
 #include "./xsimd_batch.hpp"
 #include "./xsimd_utils.hpp"
 
@@ -45,7 +47,7 @@ namespace xsimd
          */
         constexpr operator batch_type() const noexcept { return as_batch_bool(); }
 
-        constexpr bool get(size_t i) const noexcept
+        constexpr bool get(std::size_t i) const noexcept
         {
             return std::array<value_type, size> { { Values... } }[i];
         }
@@ -77,7 +79,7 @@ namespace xsimd
             constexpr bool operator()(bool x, bool y) const { return x ^ y; }
         };
 
-        template <class F, class SelfPack, class OtherPack, size_t... Indices>
+        template <class F, class SelfPack, class OtherPack, std::size_t... Indices>
         static constexpr batch_bool_constant<T, A, F()(std::tuple_element<Indices, SelfPack>::type::value, std::tuple_element<Indices, OtherPack>::type::value)...>
         apply(detail::index_sequence<Indices...>)
         {
@@ -149,13 +151,13 @@ namespace xsimd
         /**
          * @brief Get the @p i th element of this @p batch_constant
          */
-        constexpr T get(size_t i) const noexcept
+        constexpr T get(std::size_t i) const noexcept
         {
             return get(i, std::array<T, size> { Values... });
         }
 
     private:
-        constexpr T get(size_t i, std::array<T, size> const& values) const noexcept
+        constexpr T get(std::size_t i, std::array<T, size> const& values) const noexcept
         {
             return values[i];
         }
@@ -193,7 +195,7 @@ namespace xsimd
             constexpr T operator()(T x, T y) const { return x ^ y; }
         };
 
-        template <class F, class SelfPack, class OtherPack, size_t... Indices>
+        template <class F, class SelfPack, class OtherPack, std::size_t... Indices>
         static constexpr batch_constant<T, A, F()(std::tuple_element<Indices, SelfPack>::type::value, std::tuple_element<Indices, OtherPack>::type::value)...>
         apply(detail::index_sequence<Indices...>)
         {
@@ -253,7 +255,7 @@ namespace xsimd
             constexpr bool operator()(T x, T y) const { return x <= y; }
         };
 
-        template <class F, class SelfPack, class OtherPack, size_t... Indices>
+        template <class F, class SelfPack, class OtherPack, std::size_t... Indices>
         static constexpr batch_bool_constant<T, A, F()(std::tuple_element<Indices, SelfPack>::type::value, std::tuple_element<Indices, OtherPack>::type::value)...>
         apply_bool(detail::index_sequence<Indices...>)
         {