std::is_signed extended for tools::int128_t and tools::uint128_t (tools/is_signed.hpp)

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Last update: 2025-02-10 01:30:13+09:00
Include: #include "tools/is_signed.hpp"

template <typename T>
struct is_signed {
  static constexpr bool value;
};

template <typename T>
inline constexpr bool is_signed_v = is_signed<T>::value;

tools::is_signed_v<T> is equivalent to std::is_signed_v<T> || std::is_same_v<std::remove_cv_t<T>, tools::int128_t>. When using libstdc++ with -std=c++... option, std::is_signed_v<tools::int128_t> is treated as false, but with tools::is_signed, it can be treated as true.

Constraints

None

Time Complexity

Not applicable

License

Author

anqooqie

Required by

Verified with

Code

#ifndef TOOLS_IS_SIGNED_HPP
#define TOOLS_IS_SIGNED_HPP

#include <type_traits>

namespace tools {
  template <typename T>
  struct is_signed : ::std::is_signed<T> {};

  template <typename T>
  inline constexpr bool is_signed_v = ::tools::is_signed<T>::value;
}

#endif

#line 1 "tools/is_signed.hpp"



#include <type_traits>

namespace tools {
  template <typename T>
  struct is_signed : ::std::is_signed<T> {};

  template <typename T>
  inline constexpr bool is_signed_v = ::tools::is_signed<T>::value;
}