ROOT::Experimental::Detail::RColumnElementCastLE< CppT, NarrowT > Class Template Reference

template<typename CppT, typename NarrowT>
class ROOT::Experimental::Detail::RColumnElementCastLE< CppT, NarrowT >

Base class for columns storing elements of wider in-memory types, such as 64bit in-memory offsets to Index32 columns.

Definition at line 338 of file RColumnElement.hxx.

Public Member Functions
void	Pack (void *dst, void *src, std::size_t count) const final
	If the on-storage layout and the in-memory layout differ, packing creates an on-disk page from an in-memory page.
void	Unpack (void *dst, void *src, std::size_t count) const final
	If the on-storage layout and the in-memory layout differ, unpacking creates a memory page from an on-storage page.
Public Member Functions inherited from ROOT::Experimental::Detail::RColumnElementBase
	RColumnElementBase (const RColumnElementBase &other)=default
	RColumnElementBase (RColumnElementBase &&other)=default
virtual	~RColumnElementBase ()=default
virtual std::size_t	GetBitsOnStorage () const
std::size_t	GetPackedSize (std::size_t nElements=1U) const
std::size_t	GetSize () const
virtual bool	IsMappable () const
	Derived, typed classes tell whether the on-storage layout is bitwise identical to the memory layout.
RColumnElementBase &	operator= (const RColumnElementBase &other)=delete
RColumnElementBase &	operator= (RColumnElementBase &&other)=default

Static Public Attributes
static constexpr bool	kIsMappable = false

Protected Member Functions
	RColumnElementCastLE (std::size_t size)
Protected Member Functions inherited from ROOT::Experimental::Detail::RColumnElementBase
	RColumnElementBase (std::size_t size)

Additional Inherited Members
Static Public Member Functions inherited from ROOT::Experimental::Detail::RColumnElementBase
template<typename CppT = void>
static std::unique_ptr< RColumnElementBase >	Generate (EColumnType type)
	If CppT == void, use the default C++ type for the given column type.
template<>
std::unique_ptr< RColumnElementBase >	Generate (EColumnType type)
template<>
std::unique_ptr< ROOT::Experimental::Detail::RColumnElementBase >	Generate (EColumnType type)
static std::size_t	GetBitsOnStorage (EColumnType type)
static std::string	GetTypeName (EColumnType type)
Protected Attributes inherited from ROOT::Experimental::Detail::RColumnElementBase
std::size_t	fSize
	Size of the C++ value that corresponds to the on-disk element.

#include <ROOT/RColumnElement.hxx>

Inheritance diagram for ROOT::Experimental::Detail::RColumnElementCastLE< CppT, NarrowT >:

Constructor & Destructor Documentation

RColumnElementCastLE()

template<typename CppT , typename NarrowT >

ROOT::Experimental::Detail::RColumnElementCastLE< CppT, NarrowT >::RColumnElementCastLE ( std::size_t  size )

inlineexplicitprotected

Definition at line 340 of file RColumnElement.hxx.

Member Function Documentation

Pack()

template<typename CppT , typename NarrowT >

void ROOT::Experimental::Detail::RColumnElementCastLE< CppT, NarrowT >::Pack ( void *  destination, void *  source, std::size_t  count  ) const

inlinefinalvirtual

If the on-storage layout and the in-memory layout differ, packing creates an on-disk page from an in-memory page.

Reimplemented from ROOT::Experimental::Detail::RColumnElementBase.

Definition at line 345 of file RColumnElement.hxx.

Unpack()

template<typename CppT , typename NarrowT >

void ROOT::Experimental::Detail::RColumnElementCastLE< CppT, NarrowT >::Unpack ( void *  destination, void *  source, std::size_t  count  ) const

inlinefinalvirtual

If the on-storage layout and the in-memory layout differ, unpacking creates a memory page from an on-storage page.

Reimplemented from ROOT::Experimental::Detail::RColumnElementBase.

Definition at line 346 of file RColumnElement.hxx.

Member Data Documentation

kIsMappable

template<typename CppT , typename NarrowT >

constexpr bool ROOT::Experimental::Detail::RColumnElementCastLE< CppT, NarrowT >::kIsMappable = false

staticconstexpr

Definition at line 343 of file RColumnElement.hxx.