Template specializations for C++ std::variant.
The generic field for std::variant types
Definition at line 332 of file RFieldSTLMisc.hxx.
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| | RVariantField (RVariantField &&other)=default |
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| | RVariantField (std::string_view fieldName, std::vector< std::unique_ptr< RFieldBase > > itemFields) |
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| | ~RVariantField () override=default |
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| size_t | GetAlignment () const final |
| | As a rule of thumb, the alignment is equal to the size of the type.
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| size_t | GetValueSize () const final |
| | The number of bytes taken by a value of the appropriate type.
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| RVariantField & | operator= (RVariantField &&other)=default |
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| | RFieldBase (const RFieldBase &)=delete |
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| | RFieldBase (RFieldBase &&)=default |
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| | RFieldBase (std::string_view name, std::string_view type, ROOT::ENTupleStructure structure, bool isSimple, std::size_t nRepetitions=0) |
| | The constructor creates the underlying column objects and connects them to either a sink or a source.
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| virtual | ~RFieldBase ()=default |
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| virtual void | AcceptVisitor (Detail::RFieldVisitor &visitor) const |
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| RSchemaIterator | begin () |
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| RConstSchemaIterator | begin () const |
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| RValue | BindValue (std::shared_ptr< void > objPtr) |
| | Creates a value from a memory location with an already constructed object.
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| RConstSchemaIterator | cbegin () const |
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| RConstSchemaIterator | cend () const |
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| std::unique_ptr< RFieldBase > | Clone (std::string_view newName) const |
| | Copies the field and its sub fields using a possibly new name and a new, unconnected set of columns.
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| RBulk | CreateBulk () |
| | The returned bulk is initially empty; RBulk::ReadBulk will construct the array of values.
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| std::unique_ptr< void, typename RFieldBase::RCreateObjectDeleter< void >::deleter > | CreateObject () const |
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| template<typename T > |
| std::unique_ptr< T, typename RCreateObjectDeleter< T >::deleter > | CreateObject () const |
| | Generates an object of the field type and allocates new initialized memory according to the type.
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| std::unique_ptr< void, typename ROOT::Experimental::RFieldBase::RCreateObjectDeleter< void >::deleter > | CreateObject () const |
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| RValue | CreateValue () |
| | Generates an object of the field type and wraps the created object in a shared pointer and returns it an RValue connected to the field.
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| RSchemaIterator | end () |
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| RConstSchemaIterator | end () const |
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| RColumnRepresentations::Selection_t | GetColumnRepresentatives () const |
| | Returns the fColumnRepresentative pointee or, if unset (always the case for artificial fields), the field's default representative.
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| const std::string & | GetDescription () const |
| | Get the field's description.
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| const std::string & | GetFieldName () const |
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| virtual std::uint32_t | GetFieldVersion () const |
| | Indicates an evolution of the mapping scheme from C++ type to columns.
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| std::size_t | GetNRepetitions () const |
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| ROOT::DescriptorId_t | GetOnDiskId () const |
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| std::uint32_t | GetOnDiskTypeChecksum () const |
| | Return checksum stored in the field descriptor; only valid after a call to ConnectPageSource(), if the field stored a type checksum.
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| std::uint32_t | GetOnDiskTypeVersion () const |
| | Return the C++ type version stored in the field descriptor; only valid after a call to ConnectPageSource()
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| const RFieldBase * | GetParent () const |
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| std::string | GetQualifiedFieldName () const |
| | Returns the field name and parent field names separated by dots ("grandparent.parent.child")
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| EState | GetState () const |
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| ROOT::ENTupleStructure | GetStructure () const |
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| std::vector< RFieldBase * > | GetSubFields () |
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| std::vector< const RFieldBase * > | GetSubFields () const |
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| std::uint32_t | GetTraits () const |
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| const std::string & | GetTypeAlias () const |
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| virtual std::uint32_t | GetTypeChecksum () const |
| | Return the current TClass reported checksum of this class. Only valid if kTraitTypeChecksum is set.
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| const std::string & | GetTypeName () const |
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| virtual std::uint32_t | GetTypeVersion () const |
| | Indicates an evolution of the C++ type itself.
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| bool | HasDefaultColumnRepresentative () const |
| | Whether or not an explicit column representative was set.
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| bool | HasReadCallbacks () const |
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| bool | IsArtificial () const |
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| bool | IsSimple () const |
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| RFieldBase & | operator= (const RFieldBase &)=delete |
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| RFieldBase & | operator= (RFieldBase &&)=default |
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| void | SetColumnRepresentatives (const RColumnRepresentations::Selection_t &representatives) |
| | Fixes a column representative.
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| void | SetDescription (std::string_view description) |
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| void | SetOnDiskId (ROOT::DescriptorId_t id) |
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| virtual std::vector< RValue > | SplitValue (const RValue &value) const |
| | Creates the list of direct child values given a value for this field.
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| std::size_t | AppendImpl (const void *from) final |
| | Operations on values of complex types, e.g.
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| std::unique_ptr< RFieldBase > | CloneImpl (std::string_view newName) const final |
| | Called by Clone(), which additionally copies the on-disk ID.
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| void | CommitClusterImpl () final |
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| void | ConstructValue (void *where) const final |
| | Constructs value in a given location of size at least GetValueSize(). Called by the base class' CreateValue().
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| void | GenerateColumns () final |
| | Implementations in derived classes should create the backing columns corresponsing to the field type for writing.
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| void | GenerateColumns (const RNTupleDescriptor &desc) final |
| | Implementations in derived classes should create the backing columns corresponsing to the field type for reading.
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| const RColumnRepresentations & | GetColumnRepresentations () const final |
| | Implementations in derived classes should return a static RColumnRepresentations object.
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| std::unique_ptr< RDeleter > | GetDeleter () const final |
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| void | ReadGlobalImpl (ROOT::NTupleSize_t globalIndex, void *to) final |
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| size_t | AddReadCallback (ReadCallback_t func) |
| | Set a user-defined function to be called after reading a value, giving a chance to inspect and/or modify the value object.
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| virtual void | AfterConnectPageSource () |
| | Called by ConnectPageSource() once connected; derived classes may override this as appropriate.
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| std::size_t | Append (const void *from) |
| | Write the given value into columns.
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| void | Attach (std::unique_ptr< RFieldBase > child) |
| | Add a new subfield to the list of nested fields.
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| void | AutoAdjustColumnTypes (const ROOT::RNTupleWriteOptions &options) |
| | When connecting a field to a page sink, the field's default column representation is subject to adjustment according to the write options.
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| virtual void | BeforeConnectPageSource (Internal::RPageSource &) |
| | Called by ConnectPageSource() before connecting; derived classes may override this as appropriate.
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| void * | CreateObjectRawPtr () const |
| | Factory method for the field's type. The caller owns the returned pointer.
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| const ColumnRepresentation_t & | EnsureCompatibleColumnTypes (const RNTupleDescriptor &desc, std::uint16_t representationIndex) const |
| | Returns the on-disk column types found in the provided descriptor for fOnDiskId and the given representation index.
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| template<typename... ColumnCppTs> |
| void | GenerateColumnsImpl () |
| | For writing, use the currently set column representative.
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| template<std::uint32_t ColumnIndexT, typename HeadT , typename... TailTs> |
| void | GenerateColumnsImpl (const ColumnRepresentation_t &representation, std::uint16_t representationIndex) |
| | Helpers for generating columns.
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| template<typename... ColumnCppTs> |
| void | GenerateColumnsImpl (const RNTupleDescriptor &desc) |
| | For reading, use the on-disk column list.
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| virtual RExtraTypeInfoDescriptor | GetExtraTypeInfo () const |
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| virtual bool | HasExtraTypeInfo () const |
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| void | Read (RNTupleLocalIndex localIndex, void *to) |
| | Populate a single value with data from the field.
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| void | Read (ROOT::NTupleSize_t globalIndex, void *to) |
| | Populate a single value with data from the field.
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| std::size_t | ReadBulk (const RBulkSpec &bulkSpec) |
| | Returns the number of newly available values, that is the number of bools in bulkSpec.fMaskAvail that flipped from false to true.
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| virtual std::size_t | ReadBulkImpl (const RBulkSpec &bulkSpec) |
| | General implementation of bulk read.
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| virtual void | ReadInClusterImpl (RNTupleLocalIndex localIndex, void *to) |
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| void | RemoveReadCallback (size_t idx) |
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| enum | {
kTraitTriviallyConstructible = 0x01
, kTraitTriviallyDestructible = 0x02
, kTraitMappable = 0x04
, kTraitTypeChecksum = 0x08
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kTraitInvalidField = 0x10
, kTraitEmulatedField = 0x20
, kTraitTrivialType = kTraitTriviallyConstructible | kTraitTriviallyDestructible
} |
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| using | ColumnRepresentation_t = std::vector<ROOT::ENTupleColumnType> |
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| enum class | EState { kUnconnected
, kConnectedToSink
, kConnectedToSource
} |
| | During its lifetime, a field undergoes the following possible state transitions: More...
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| using | RConstSchemaIterator = RSchemaIteratorTemplate<true> |
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| using | RSchemaIterator = RSchemaIteratorTemplate<false> |
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| static std::vector< RCheckResult > | Check (const std::string &fieldName, const std::string &typeName) |
| | Checks if the given type is supported by RNTuple.
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| static RResult< std::unique_ptr< RFieldBase > > | Create (const std::string &fieldName, const std::string &typeName) |
| | Factory method to create a field from a certain type given as string.
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| static constexpr std::uint32_t | kInvalidTypeVersion = -1U |
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| static std::size_t | CallAppendOn (RFieldBase &other, const void *from) |
| | Allow derived classes to call Append and Read on other (sub) fields.
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| static void | CallConstructValueOn (const RFieldBase &other, void *where) |
| | Allow derived classes to call ConstructValue(void *) and GetDeleter on other (sub) fields.
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| static void * | CallCreateObjectRawPtrOn (RFieldBase &other) |
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| static void | CallReadOn (RFieldBase &other, RNTupleLocalIndex localIndex, void *to) |
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| static void | CallReadOn (RFieldBase &other, ROOT::NTupleSize_t globalIndex, void *to) |
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| static RResult< std::unique_ptr< RFieldBase > > | Create (const std::string &fieldName, const std::string &typeName, const ROOT::RCreateFieldOptions &options, const RNTupleDescriptor *desc, ROOT::DescriptorId_t fieldId) |
| | Factory method to resurrect a field from the stored on-disk type information.
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| static std::unique_ptr< RDeleter > | GetDeleterOf (const RFieldBase &other) |
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| static Internal::RColumn * | GetPrincipalColumnOf (const RFieldBase &other) |
| | Fields may need direct access to the principal column of their sub fields, e.g. in RRVecField::ReadBulk.
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| Internal::RColumn * | fAuxiliaryColumn = nullptr |
| | Some fields have a second column in its column representation.
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| std::vector< std::unique_ptr< Internal::RColumn > > | fAvailableColumns |
| | The columns are connected either to a sink or to a source (not to both); they are owned by the field.
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| std::vector< std::reference_wrapper< const ColumnRepresentation_t > > | fColumnRepresentatives |
| | Pointers into the static vector GetColumnRepresentations().GetSerializationTypes() when SetColumnRepresentatives is called.
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| std::uint32_t | fOnDiskTypeChecksum = 0 |
| | TClass checksum cached from the descriptor after a call to ConnectPageSource().
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| std::uint32_t | fOnDiskTypeVersion = kInvalidTypeVersion |
| | C++ type version cached from the descriptor after a call to ConnectPageSource()
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| RFieldBase * | fParent |
| | Sub fields point to their mother field.
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| Internal::RColumn * | fPrincipalColumn = nullptr |
| | All fields that have columns have a distinct main column.
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| std::vector< ReadCallback_t > | fReadCallbacks |
| | List of functions to be called after reading a value.
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| std::vector< std::unique_ptr< RFieldBase > > | fSubFields |
| | Collections and classes own sub fields.
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| std::uint32_t | fTraits = 0 |
| | Properties of the type that allow for optimizations of collections of that type.
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| std::string | fTypeAlias |
| | A typedef or using name that was used when creating the field.
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| size_t ROOT::Experimental::RVariantField::GetAlignment |
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const |
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finalvirtual |
As a rule of thumb, the alignment is equal to the size of the type.
There are, however, various exceptions to this rule depending on OS and CPU architecture. So enforce the alignment to be explicitly spelled out.
Implements ROOT::Experimental::RFieldBase.
Definition at line 1286 of file RFieldMeta.cxx.
Public Member Functions inherited from ROOT::Experimental::RFieldBase
