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      std::make_unsigned

      From cppreference.com
      <cpp‎ |types
       
       
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      make_unsigned
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      Compile-time rational arithmetic
      Compile-time integer sequences
       
      Defined in header<type_traits>
      template<class T>
      struct make_unsigned;
      (since C++11)

      IfT is an integral (exceptbool) or enumeration type, provides the member typedeftype which is the unsigned integer type corresponding toT, with the same cv-qualifiers.

      IfT is signed or unsignedchar,short,int,long,longlong; the unsigned type from this list corresponding toT is provided.

      IfT is an enumeration type orchar,wchar_t,char8_t(since C++20),char16_t,char32_t; the unsigned integer type with the smallestrank having the samesizeof asT is provided.

      Otherwise, the behavior is undefined.

      (until C++20)

      Otherwise, the program is ill-formed.

      (since C++20)

      If the program adds specializations forstd::make_unsigned, the behavior is undefined.

      Contents

      [edit]Member types

      Name Definition
      type the unsigned integer type corresponding toT

      [edit]Helper types

      template<class T>
      using make_unsigned_t=typename make_unsigned<T>::type;
      (since C++14)

      [edit]Example

      Run this code
      #include <type_traits> int main(){using uchar_type= std::make_unsigned_t<char>;using uint_type= std::make_unsigned_t<int>;using ulong_type= std::make_unsigned_t<volatilelong>;     static_assert(std::is_same_v<uchar_type,unsignedchar> andstd::is_same_v<uint_type,unsignedint> andstd::is_same_v<ulong_type,volatileunsignedlong>);}

      [edit]See also

      (C++11)
      checks if a type is a signed arithmetic type
      (class template)[edit]
      checks if a type is an unsigned arithmetic type
      (class template)[edit]
      obtains the corresponding signed type for the given integral type
      (class template)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/types/make_unsigned&oldid=153279"

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