Datum.h File Reference

Definitions for core Datum union type. More...

#include "funcannotations.h"
#include <type_traits>
#include <string_view>

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Classes
struct	StringView
struct	VarlenDatum
union	Datum

Functions
template<typename T >
Datum	make_datum (T val)

Detailed Description

Definitions for core Datum union type.

Definition in file Datum.h.

Function Documentation

template<typename T >

Datum make_datum

(

T

val

)

Definition at line 86 of file Datum.h.

References Datum::arrayval, Datum::bigintval, Datum::boolval, Datum::doubleval, Datum::floatval, Datum::intval, Datum::smallintval, Datum::stringval, and Datum::tinyintval.

                        {
  static_assert(std::is_same_v<T, bool> || std::is_same_v<T, int8_t> ||
                    std::is_same_v<T, int16_t> || std::is_same_v<T, int32_t> ||
                    std::is_same_v<T, int64_t> || std::is_same_v<T, float> ||
                    std::is_same_v<T, double> || std::is_same_v<T, VarlenDatum*>
#ifndef __CUDACC__
                    || std::is_same_v<T, std::string*>
#endif
                ,
                "Type T must be one of the allowed types");
  Datum d;
  if constexpr (std::is_same_v<T, bool>) {
    d.boolval = static_cast<int8_t>(val);
  } else if constexpr (std::is_same_v<T, int8_t>) {
    d.tinyintval = val;
  } else if constexpr (std::is_same_v<T, int16_t>) {
    d.smallintval = val;
  } else if constexpr (std::is_same_v<T, int32_t>) {
    d.intval = val;
  } else if constexpr (std::is_same_v<T, int64_t>) {
    d.bigintval = val;
  } else if constexpr (std::is_same_v<T, float>) {
    d.floatval = val;
  } else if constexpr (std::is_same_v<T, double>) {
    d.doubleval = val;
  } else if constexpr (std::is_same_v<T, VarlenDatum*>) {
    // deleting `arrayval` is caller's responsibility
    d.arrayval = val;
#ifndef __CUDACC__
  } else if constexpr (std::is_same_v<T, std::string*>) {
    // deleting `stringval` is caller's responsibility
    d.stringval = val;
#endif
  }
  return d;
}