23 if (inputs ==
nullptr || mergeInfo ==
nullptr) {
#define R__FAIL(msg)
Short-hand to return an RResult<T> in an error state; the RError is implicitly converted into RResult...
Meta-data stored for every field of an ntuple.
std::string GetFieldName() const
static RResult< RFieldMerger > Merge(const RFieldDescriptor &lhs, const RFieldDescriptor &rhs)
Long64_t Merge(TCollection *input, TFileMergeInfo *mergeInfo)
RNTuple implements the hadd MergeFile interface Merge this NTuple with the input list entries.
The class is used as a return type for operations that can fail; wraps a value of type T or an RError...
Collection abstract base class.