Print with fold expression separated by delimiter

Print.hpp

#include <ostream>
#include <string>
#include <type_traits>
#include <utility>

template <typename CharT, typename Arg>
auto
Print(std::ostream &os, [[maybe_unused]] CharT delimiter, const Arg &arg)
    -> std::ostream & {
  static_assert(
      std::is_same_v<CharT, typename std::char_traits<CharT>::char_type>,
      "'CharT' must be a valid character type.");

  os << arg;
  return os;
}

template <typename CharT, typename Arg, typename... Args>
auto
Print(std::ostream &os, CharT delimiter, const Arg &arg, Args &&...args)
    -> std::ostream & {
  static_assert(
      std::is_same_v<CharT, typename std::char_traits<CharT>::char_type>,
      "'CharT' must be a valid character type.");

  Print(os, delimiter, arg) << delimiter;
  return Print(os, delimiter, std::forward<Args>(args)...);
}