LI77540: ERROR MESSAGE ABOUT TEMPLATE DEFINITION

XL C/C++ for Blue Gene/Q Fix Pack 12 (May 2015 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 14 (May 2016 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 15 (October 2017 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 6 (November 2013 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 7 (February 2014 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 8 (May 2014 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 9 (August 2014 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 10 (November 2014 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 11 (February 2015 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 13 (August 2015 Update) for 12.1

APAR status

• Closed as program error.

Error description

• Reduced testcase:
  
  $cat b.cpp
  
  namespace Tpetra{
    template<class Scalar, class LocalOrdinal,class
  GlobalOrdinal,class Node> struct MultiVector {};
  }
  
  namespace Xpetra {
     template <class Scalar, class LocalOrdinal, class
  GlobalOrdinal, class Node> struct MultiVector{};
  }
  
  struct Epetra_MultiVector{};
  
  template <class Scalar, class LocalOrdinal, class
  GlobalOrdinal, class Node, class LocalMatOps>
  struct Utils {
       typedef LocalOrdinal  LO;
       typedef GlobalOrdinal GO;
       typedef Node          NO;
       typedef LocalMatOps   LMO;
       typedef Xpetra::MultiVector<Scalar, LocalOrdinal,
  GlobalOrdinal, Node> MultiVector;
       typedef Scalar    SC;
       static RCP<const Epetra_MultiVector>
  MV2EpetraMV(RCP<MultiVector> const Vec);
       static RCP< Tpetra::MultiVector<SC,LO,GO,NO> >
  MV2NonConstTpetraMV(RCP<MultiVector> Vec);
  };
  
  template <class Scalar, class LocalOrdinal, class
  GlobalOrdinal, class Node, class LocalMatOps>
  RCP<Tpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal,
  Node> >
  Utils<Scalar, LocalOrdinal, GlobalOrdinal, Node,
  LocalMatOps>::MV2NonConstTpetraMV(RCP<MultiVector> Vec)   {  }
  
  template struct Utils<int,int,int,int,int>;
  
  $xlC b.cpp
  "b.cpp", line 29.1: 1540-1174 (S) The member "template
  RCP<MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> >
  MV2NonConstTpetraMV(RCP<MultiVector<Scalar,LocalOrdinal,GlobalOr
  dinal,Node> >)" is not declared as a template in its containing
  class definition.
  

Local fix

• Define the member functions inside the class instead of
  out-of-line.
  

Problem summary

• PROBLEM DESCRIPTION: The compiler was confusing matching names
  in different namespaces while resolving names in a template
  definition.   This caused an error that a member defined
  out-of-line was not defined in its class.
  
  USERS AFFECTED: The problem may be seen when a class refers to
  the instantiation of a template with the same name in 2
  different namespaces.
  

Problem conclusion

• The problem has been resolved.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  LI77636 IV53339

Fix information

• Fixed component name

  XL C/C++ FOR BG

• Fixed component ID

  5799AG100

Applicable component levels