Function Decimal256

cpp/src/arrow/util/decimal.h:418–419

\brief constructor creates a Decimal256 from a BasicDecimal256.

  /// \brief constructor creates a Decimal256 from a BasicDecimal256.
  constexpr Decimal256(const BasicDecimal256& value) noexcept  // NOLINT(runtime/explicit)
      : BasicDecimal256(value) {}

  /// \brief Parse the number from a base 10 string representation.
  explicit Decimal256(const std::string& value);