Program Listing for File common_signed_t.hpp

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#pragma once
#ifndef UITSL_META_COMMON_SIGNED_T_HPP_INCLUDE
#define UITSL_META_COMMON_SIGNED_T_HPP_INCLUDE

// adapted from https://stackoverflow.com/a/63436491

#include <type_traits>

namespace uitsl {

template <typename A, typename B>
using common_signed_t = std::conditional_t<
  std::is_unsigned_v<A> && std::is_unsigned_v<B>,
  std::common_type_t<A, B>,
  std::common_type_t<std::make_signed_t<A>, std::make_signed_t<B>>
>;

} // namespace uitsl

#endif // #ifndef UITSL_META_COMMON_SIGNED_T_HPP_INCLUDE