.. _program_listing_file_sockets_include_sockets_detail_byteswap.hpp:

Program Listing for File byteswap.hpp
=====================================

|exhale_lsh| :ref:`Return to documentation for file <file_sockets_include_sockets_detail_byteswap.hpp>` (``sockets/include/sockets/detail/byteswap.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #pragma once
   
   #include <algorithm>
   #include <array>
   #include <bit>
   #include <concepts>
   
   template<std::integral T>
   constexpr T byteswap(T value) noexcept {
   #ifdef __cpp_lib_byteswap
       return std::byteswap(value);
   #else
       static_assert(std::has_unique_object_representations_v<T>, "T may not have padding bits");
       auto value_representation = std::bit_cast<std::array<std::byte, sizeof(T)> >(value);
       std::reverse(value_representation.begin(), value_representation.end());
       return std::bit_cast<T>(value_representation);
   #endif
   }