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[TDF] Allow proper re-usage of TDataFrameValues #467

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[TDF] Allow proper re-usage of TDataFrameValues #467

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10 changes: 10 additions & 0 deletions tree/treeplayer/inc/ROOT/TDFNodes.hxx
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Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,7 @@ public:

void MakeProxy(TTreeReader &r, const std::string &bn)
{
Reset();
bool useReaderValue = std::is_same<ProxyParam_t, T>::value;
if (useReaderValue)
fReaderValue.reset(new TTreeReaderValue<T>(r, bn.c_str()));
Expand All @@ -163,6 +164,14 @@ public:

return std::array_view<ProxyParam_t>(fReaderArray->begin(), fReaderArray->end());
}

void Reset() {
fReaderValue = nullptr;
fReaderArray = nullptr;
fValuePtr = nullptr;
fTmpColumn = nullptr;
fSlot = 0;
}
};

template <typename T>
Expand Down Expand Up @@ -528,6 +537,7 @@ public:
template <typename T>
void ROOT::Internal::TDataFrameValue<T>::SetTmpColumn(unsigned int slot, ROOT::Detail::TDataFrameBranchBase *tmpColumn)
{
Reset();
fTmpColumn = tmpColumn;
if (tmpColumn->GetTypeId() != typeid(T))
throw std::runtime_error(std::string("TDataFrameValue: type specified is ") + typeid(T).name() +
Expand Down