Concurrency::_Radix_sort_default_function< _DataType > Struct Template Reference

#include <ppl.h>

Public Member Functions
size_t	operator() (const _DataType &_Val) const

Member Function Documentation

template<typename _DataType>

size_t Concurrency::_Radix_sort_default_function< _DataType >::operator() ( const _DataType &  _Val ) const

inline

    {
        // An instance of the type predicate returns the value if the type _DataType is one of the integral types, otherwise it
        // statically asserts.
        // An integral type is one of: bool, char, unsigned char, signed char, wchar_t, short, unsigned short, int, unsigned int, long,
        // and unsigned long.
        // In addition, with compilers that provide them, an integral type can be one of long long, unsigned long long, __int64, and
        // unsigned __int64
        static_assert(std::is_integral<_DataType>::value,
            "Type should be integral to use default radix function. For more information on integral types, please refer to https://msdn.microsoft.com/en-us/library/bb983099.aspx.");
        static_assert((sizeof(_DataType) <= sizeof(size_t)), "Passed Type is bigger than size_t.");

        if (std::is_unsigned<_DataType>::value)
        {
            return _Val;
        }
        else
        {
            // The default function needs to take the signed integer-like representation and map it to an unsigned one. The
            // following code will take the midpoint of the unsigned representable range (SIZE_MAX/2)+1 and does an unsigned
            // add of the value. Thus, it maps a [-signed_min,+signed_max] range into a [0, unsigned_max] range.
            return (((SIZE_MAX/2) + 1) + static_cast<size_t>(_Val));
        }
    }

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The documentation for this struct was generated from the following file:

• VS2017/inc/ppl.h