Compilation with Double Precision Blocked

[beomki-yeo]

Maybe we need to make detray configuration always float number?

[beomki@pc-54 traccc_build]$ cmake ../traccc -DTRACCC_CUSTOM_SCALARTYPE=double -DDETRAY_CUSTOM_SCALARTYPE=double

/home/beomki/projects/traccc/traccc/examples/run/cpu/truth_fitting_example.cpp: In function ‘int main(int, char**)’:
/home/beomki/projects/traccc/traccc/examples/run/cpu/truth_fitting_example.cpp:119:44: error: no match for ‘operator=’ (operand types are ‘detray::propagation::config<double>’ and ‘detray::propagation::config<float>’)
  119 |     fit_cfg.propagation = propagation_opts.config;
      |                                            ^~~~~~
In file included from /home/beomki/projects/traccc/traccc/core/include/traccc/fitting/fitting_config.hpp:12,
                 from /home/beomki/projects/traccc/traccc/core/include/traccc/fitting/fitting_algorithm.hpp:14,
                 from /home/beomki/projects/traccc/traccc/examples/run/cpu/truth_fitting_example.cpp:11:
/home/beomki/projects/traccc/traccc_build/_deps/detray-src/core/include/detray/propagator/propagation_config.hpp:18:8: note: candidate: ‘constexpr detray::propagation::config<double>& detray::propagation::config<double>::operator=(const detray::propagation::config<double>&)’
   18 | struct config {
      |        ^~~~~~
/home/beomki/projects/traccc/traccc_build/_deps/detray-src/core/include/detray/propagator/propagation_config.hpp:18:8: note:   no known conversion for argument 1 from ‘detray::propagation::config<float>’ to ‘const detray::propagation::config<double>&’
/home/beomki/projects/traccc/traccc_build/_deps/detray-src/core/include/detray/propagator/propagation_config.hpp:18:8: note: candidate: ‘constexpr detray::propagation::config<double>& detray::propagation::config<double>::operator=(detray::propagation::config<double>&&)’
/home/beomki/projects/traccc/traccc_build/_deps/detray-src/core/include/detray/propagator/propagation_config.hpp:18:8: note:   no known conversion for argument 1 from ‘detray::propagation::config<float>’ to ‘detray::propagation::config<double>&&’
/home/beomki/projects/traccc/traccc/examples/run/cpu/seeding_example.cpp: In function ‘int seq_run(const traccc::opts::track_seeding&, const traccc::opts::track_finding&, const traccc::opts::track_propagation&, const traccc::opts::track_resolution&, const traccc::opts::input_data&, const traccc::opts::detector&, const traccc::opts::performance&)’:
/home/beomki/projects/traccc/traccc/examples/run/cpu/seeding_example.cpp:142:40: error: no match for ‘operator=’ (operand types are ‘detray::propagation::config<double>’ and ‘const detray::propagation::config<float>’)
  142 |     cfg.propagation = propagation_opts.config;

[krasznaa]

Ouch... I should've tested this... 🤔

Generally, I'll want to get to a stage where all of the templated algorithms / tools / etc. would receive non-templated configuration arguments. To make it a lot easier to handle them in client code.

I guess that should be possible, right? Do we have examples where a "config type" would actually depend on the template parameters of its parent object? (Apart from the scalar type of course.)

But in the meanwhile, I'll try to come up with a temporary solution to this particular issue. 🤔

[beomki-yeo]

That should be possible. Just need some time in the detray side