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Bug #18738

PtrMaker can create pointers only for std::vector data products

Added by Gianluca Petrillo almost 3 years ago. Updated almost 3 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Kyle Knoepfel
Category:
Application
Target version:
2.10.00
Start date:
01/12/2018
Due date:
% Done:

100%

Estimated time:
2.00 h
Spent time:
2.00 h
Occurs In:
2.09.06
Scope:
Experiment:
LArSoft
SSI Package:
art
Duration:

Description

The class art::PtrMaker (source:art/Persistency/Common/PtrMaker.h#L55) was written with the idea of supporting the creation of pointers from "any" container data products. Its relevant constructor:

//Creates a PtrMaker that creates Ptrs in to a collection of type C created by the module of type MODULETYPE, where the collection has instance name "instance" 
template <class EVENT, class MODULETYPE, class C = std::vector<T>>
PtrMaker(EVENT const & evt, MODULETYPE const& module, std::string const& instance = std::string());
sports a data type C for the container data product itself.
But to my knowledge that template argument cannot be explicitly specified in a call, and it's not automatically detected either. That makes it impossible to effectively use the intended feature.

History

#1 Updated by Kyle Knoepfel almost 3 years ago

  • Status changed from New to Accepted
  • Estimated time set to 2.00 h

Oops.

#2 Updated by Kyle Knoepfel almost 3 years ago

  • Description updated (diff)

#3 Updated by Kyle Knoepfel almost 3 years ago

  • Category set to Application
  • Status changed from Accepted to Resolved
  • Assignee set to Kyle Knoepfel
  • Target version set to 2.10.00
  • % Done changed from 0 to 100
  • Scope deleted (Internal)
  • Occurs In 2.09.06 added
  • SSI Package art added

#4 Updated by Kyle Knoepfel almost 3 years ago

  • Status changed from Resolved to Closed

In order to facilitate the behavior you have requested, we have introduced the static member function 'create':

void MyProducer::produce(art::Event& e) override
{
  auto const maker = art::PtrMaker<int>::create<IntCollection>(e, *this, "my_instance");
  ...
}

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