Function bit_width

cpp/src/arrow/type.h:197–197

\brief Returns the type's fixed bit width, if any. Returns -1 for non-fixed-width types, and should only be used for subclasses of FixedWidthType

  /// for non-fixed-width types, and should only be used for
  /// subclasses of FixedWidthType
  virtual int bit_width() const { return -1; }

  // \brief EXPERIMENTAL: Enable retrieving shared_ptr<DataType> from a const
  // context.