Read a value in a branch without knowledge of its type.

This class is helpful in situations where the actual contents of the branch at the current entry are not relevant and one only wants to know whether the entry can be read.

Definition at line 163 of file TTreeReaderValue.h.

Public Member Functions
	TTreeReaderOpaqueValue (TTreeReader &tr, const char *branchname)

Public Member Functions inherited from ROOT::Internal::TTreeReaderValueBase
virtual	~TTreeReaderValueBase ()
	Unregister from tree reader, cleanup.

void *	GetAddress ()
	Returns the memory address of the object being read.

const char *	GetBranchName () const

TLeaf *	GetLeaf ()
	If we are reading a leaf, return the corresponding TLeaf.

virtual EReadStatus	GetReadStatus () const

ESetupStatus	GetSetupStatus () const
	Return this TTreeReaderValue's setup status.

bool	IsValid () const
	Return true if the branch was setup and read correctly.

EReadStatus	ProxyRead ()

EReadStatus	ProxyReadDefaultImpl ()

template<BranchProxyRead_t Func>
ROOT::Internal::TTreeReaderValueBase::EReadStatus	ProxyReadTemplate ()
	Try to read the value from the TBranchProxy, returns the status of the read.

Protected Member Functions
const char *	GetDerivedTypeName () const

Protected Member Functions inherited from ROOT::Internal::TTreeReaderValueBase
	TTreeReaderValueBase (const TTreeReaderValueBase &)
	Copy-construct.

	TTreeReaderValueBase (TTreeReader reader, const char branchname, TDictionary *dict, bool opaqueRead=false)
	Construct a tree value reader and register it with the reader object.

virtual void	CreateProxy ()
	Create the proxy object for our branch.

void	ErrorAboutMissingProxyIfNeeded ()

Detail::TBranchProxy *	GetProxy () const

void	MarkTreeReaderUnavailable ()

void	NotifyNewTree (TTree *newTree)
	The TTreeReader has switched to a new TTree. Update the leaf.

TTreeReaderValueBase &	operator= (const TTreeReaderValueBase &)
	Copy-assign.

void	RegisterWithTreeReader ()
	Register with tree reader.

TBranch *	SearchBranchWithCompositeName (TLeaf &myleaf, TDictionary &branchActualType, std::string &err)
	Search a branch the name of which contains a ".".

Additional Inherited Members
Public Types inherited from ROOT::Internal::TTreeReaderValueBase
typedef bool(ROOT::Detail::TBranchProxy::*	BranchProxyRead_t) ()

enum	EReadStatus { kReadSuccess = 0 , kReadNothingYet , kReadError }

enum	ESetupStatus { kSetupNotSetup = -7 , kSetupTreeDestructed = -8 , kSetupMakeClassModeMismatch = -9 , kSetupMissingCounterBranch = -6 , kSetupMissingBranch = -5 , kSetupInternalError = -4 , kSetupMissingDictionary = -3 , kSetupMismatch = -2 , kSetupNotACollection = -1 , kSetupMatch , kSetupMatchBranch , kSetupNoCheck = 5 , kSetupMatchLeaf = 6 }
	Status flags, 0 is good. More...

Protected Types inherited from ROOT::Internal::TTreeReaderValueBase
typedef EReadStatus(TTreeReaderValueBase::*	Read_t) ()

Static Protected Member Functions inherited from ROOT::Internal::TTreeReaderValueBase
static const char *	GetBranchDataType (TBranch branch, TDictionary &dict, TDictionary const *curDict)
	Retrieve the type of data stored by branch; put its dictionary into dict, return its type name.

static std::string	GetElementTypeName (const std::type_info &ti)
	Stringify the template argument.

Protected Attributes inherited from ROOT::Internal::TTreeReaderValueBase
TString	fBranchName
	Name of the branch to read data from.

TDictionary *	fDict
	Type that the branch should contain.

bool	fHaveLeaf: 1
	Whether the data is in a leaf.

bool	fHaveStaticClassOffsets: 1
	Whether !fStaticClassOffsets.empty()

TLeaf *	fLeaf = nullptr

TString	fLeafName

bool	fOpaqueRead {false}
	If true, the reader will not do any type-checking against the actual type held by the branch.

Detail::TBranchProxy *	fProxy = nullptr
	Proxy for this branch, owned by TTreeReader.

Read_t	fProxyReadFunc = &TTreeReaderValueBase::ProxyReadDefaultImpl
	! Pointer to the Read implementation to use.

EReadStatus	fReadStatus: 2
	Read status of this data access.

ESetupStatus	fSetupStatus = kSetupNotSetup
	Setup status of this data access.

std::vector< Long64_t >	fStaticClassOffsets

TTreeReader *	fTreeReader
	Tree reader we belong to.