Edit: The cxx line is not valid C++.
cxx"""UTIL::CellIDDecoder<SimCalorimeterHit>($(collection.coll)) x;
should of course read:
cxx"""UTIL::CellIDDecoder<SimCalorimeterHit> x($(collection.coll));
Nevertheless, the icxx call seems valid, so I still don't understand why
this isn't working.
Any insight is greatly appreciated.
On Monday, July 4, 2016 at 10:09:34 PM UTC-7, Jan Strube wrote:
>
> What's the right way to create a templated class on the C++ side with Cxx?
>
> I have an LCCollection
> <http://lcio.desy.de/v02-07/doc/doxygen_api/html/classEVENT_1_1LCCollection.html>,
>
> and I would like to create a CellIDDecoder
> <http://lcio.desy.de/v02-07/doc/doxygen_api/html/classUTIL_1_1CellIDDecoder.html>,
>
> which needs a template argument.
>
> A simple
> cxx"""UTIL::CellIDDecoder<SimCalorimeterHit>($(collection.coll)) x;
> std::cout << x << std::endl;
> results in
>
> ERROR: LoadError: Creating LLVM constants for type `T` not implemented yet
> in llvmconst(::Any) at /home/stru821/.julia/v0.5/Cxx/src/cxxstr.jl:22
> in ArgCleanup(::Cxx.ClangCompiler, ::Cxx.CppPtr{Cxx.CxxQualType{Cxx.
> CppBaseType{Symbol("EVENT::LCCollection")},(false,false,false)},(false,
> false,false)}, ::Cxx.CppPtr{Cxx.CxxQualType{Cxx.CppBaseType{Symbol(
> "clang::VarDecl")},(false,false,false)},(false,false,false)}) at /home/
> stru821/.julia/v0.5/Cxx/src/cxxstr.jl:192
> in macro expansion at /home/stru821/.julia/v0.5/Cxx/src/cxxstr.jl:634 [
> inlined]
> in getCellIDDecoder(::LCIO.LCCollection{Cxx.CppPtr{Cxx.CxxQualType{Cxx.
> CppBaseType{Symbol("EVENT::SimCalorimeterHit")},(false,false,false)},(
> false,false,false)}}) at /home/stru821/.julia/v0.5/LCIO/src/CaloHit.jl:29
> in testReader(::String) at /home/stru821/.julia/v0.5/LCIO/examples/
> testLCIOCxx.jl:14
> in include_from_node1(::String) at ./loading.jl:426
> in process_options(::Base.JLOptions) at ./client.jl:266
> in _start() at ./client.jl:322
> while loading /home/stru821/.julia/v0.5/LCIO/examples/testLCIOCxx.jl, in
> expression starting on line 22
>
> I have also tried to return the result of
> icxx"""UTIL::CellIDDecoder<SimCalorimeterHit>($(collection.coll));
>
> But that replies with an even stranger message:
> :2:45: error: no matching constructor for initialization of
> 'UTIL::CellIDDecoder<SimCalorimeterHit>'
> UTIL::CellIDDecoder < SimCalorimeterHit > ( __juliavar1 ) ;
> ^
> /scratch/software/lcio-test/include/UTIL/CellIDDecoder.h:36:3: note:
> candidate constructor not viable: requires single argument 'encoder_str',
> but no arguments were provided
> CellIDDecoder( const std::string& encoder_str ) : _oldHit(0) {
> ^
> /scratch/software/lcio-test/include/UTIL/CellIDDecoder.h:47:5: note:
> candidate constructor not viable: requires single argument 'col', but no
> arguments were provided
> CellIDDecoder( const EVENT::LCCollection* col ) : _oldHit(0) {
> ^
>
> The code clearly has a constructor argument, so I don't understand why the
> compiler things it doesn't...
>
> If somebody knows how to construct such a templated class, please share.
> Many thanks.
>
