Gaudi::details Namespace Reference

Helper for type agnostic reading of data in branches. More...

Classes
class	LegacyAlgorithmAdapter
struct	overloaded_t
struct	container
	helper structure to get container type More...
class	BranchReadHelper
struct	BranchWrapper
	Encapsulates a branch within a ROOT TTree, managing the data and interaction with the TTree. More...

Functions
template<typename... lambda_ts>
	overloaded_t (lambda_ts...) -> overloaded_t< lambda_ts... >
GAUDI_API void	rangeException (const long index, const size_t size)
	Helpful function to throw an "out-of-range exception" for class Range_.

Detailed Description

Helper for type agnostic reading of data in branches.

Use like this:

auto f = TFile::Open("file.root");
auto t = f->Get<TTree>("tree");
BranchReadHelper b(t->GetBranch("branch"));
for (int i = 0; i < t->GetEntries(); ++i) {
    t->GetEntry(i);
    std::unique_ptr<DataObject> obj = b.adoptValue();
    ...
}

Function Documentation

overloaded_t()

template<typename... lambda_ts>

Gaudi::details::overloaded_t

(

lambda_ts...

)

-> overloaded_t< lambda_ts... >

rangeException()

void Gaudi::details::rangeException	(	const long	index,
		const size_t	size )

Helpful function to throw an "out-of-range exception" for class Range_.

See also

GaudiException

Parameters

index	invalid index
size	range size

Definition at line 30 of file Range.cpp.

                                                                {
  throw GaudiException( "Out-of-Range for class Gaudi::Range_", "RangeError", StatusCode::FAILURE );
}