Squashed 'externals/mp/' content from commit 29cb5588d

git-subtree-dir: externals/mp
git-subtree-split: 29cb5588da3a18ed571a0e41622900a01b9f01eb

include/mp/traits/integer_of_size.h

@@ -0,0 +1,50 @@
+/* This file is part of the mp project.
+ * Copyright (c) 2018 MerryMage
+ * SPDX-License-Identifier: 0BSD
+ */
+
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+
+namespace mp {
+
+namespace detail {
+
+template<std::size_t size>
+struct integer_of_size_impl{};
+
+template<>
+struct integer_of_size_impl<8> {
+    using unsigned_type = std::uint8_t;
+    using signed_type = std::int8_t;
+};
+
+template<>
+struct integer_of_size_impl<16> {
+    using unsigned_type = std::uint16_t;
+    using signed_type = std::int16_t;
+};
+
+template<>
+struct integer_of_size_impl<32> {
+    using unsigned_type = std::uint32_t;
+    using signed_type = std::int32_t;
+};
+
+template<>
+struct integer_of_size_impl<64> {
+    using unsigned_type = std::uint64_t;
+    using signed_type = std::int64_t;
+};
+
+} // namespace detail
+
+template<std::size_t size>
+using unsigned_integer_of_size = typename detail::integer_of_size_impl<size>::unsigned_type;
+
+template<std::size_t size>
+using signed_integer_of_size = typename detail::integer_of_size_impl<size>::signed_type;
+
+} // namespace mp