StdVector of pointer with CxxWrap 0.15

[grasph]

Hello @barche , hello @melven ,

I have troubles with CxxWrap v0.15 and STL vectors of pointers. I get the following error message when compiling the wrapper.

                 from tmp.cc:1:
/home/pgras/.julia/artifacts/33ec05e328daf2b9f2b25f421ea33a5d78189cf2/include/jlcxx/module.hpp: In instantiation of ‘jlcxx::detail::ReturnTypeAdapter<R, Args>::return_type jlcxx::detail::ReturnTypeAdapter<R, Args>::operator()(const void*, jlcxx::static_julia_type<Args>...) [with R = A* const; Args = {std::queue<A*, std::deque<A*, std::allocator<A*> > >&}; return_type = A*]’:
/home/pgras/.julia/artifacts/33ec05e328daf2b9f2b25f421ea33a5d78189cf2/include/jlcxx/module.hpp:73:45:   required from ‘static jlcxx::detail::CallFunctor<R, Args>::return_type jlcxx::detail::CallFunctor<R, Args>::apply(const void*, jlcxx::static_julia_type<Args>...) [with R = A* const; Args = {std::queue<A*, std::deque<A*, std::allocator<A*> > >&}; return_type = A*]’
/home/pgras/.julia/artifacts/33ec05e328daf2b9f2b25f421ea33a5d78189cf2/include/jlcxx/module.hpp:252:12:   required from ‘void* jlcxx::FunctionWrapper<R, Args>::pointer() [with R = A* const; Args = {std::queue<A*, std::deque<A*, std::allocator<A*> > >&}]’
/home/pgras/.julia/artifacts/33ec05e328daf2b9f2b25f421ea33a5d78189cf2/include/jlcxx/module.hpp:250:17:   required from here
/home/pgras/.julia/artifacts/33ec05e328daf2b9f2b25f421ea33a5d78189cf2/include/jlcxx/module.hpp:48:28: error: cannot convert ‘jlcxx::WrappedCppPtr’ to ‘jlcxx::detail::ReturnTypeAdapter<A* const, std::queue<A*, std::deque<A*, std::allocator<A*> > >&>::return_type’ {aka ‘A*’} in return
   48 |     return convert_to_julia((*std_func)(convert_to_cpp<Args>(args)...));
      |            ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                            |
      |                            jlcxx::WrappedCppPtr

The code producing this error is the following:

#include "jlcxx/jlcxx.hpp"
#include "jlcxx/stl.hpp"

struct A{
};

std::vector<A*> f(){ static A a; return std::vector({&a}); }

namespace jlcxx {
  template<> struct IsMirroredType<A> : std::false_type { };
}

JLCXX_MODULE define_julia_module(jlcxx::Module& module){
  auto t =  module.add_type<A>("A");
  module.method("f", f);
}

Julia script to compile and use the library in one shot:

import CxxWrap

open("tmp.cc", "w") do f
    write(f,
"""#include "jlcxx/jlcxx.hpp"
#include "jlcxx/functions.hpp"
#include "jlcxx/stl.hpp"

struct A{
};

std::vector<A*> f(){ static A a; return std::vector({&a}); }

namespace jlcxx {
  template<> struct IsMirroredType<A> : std::false_type { };
}

JLCXX_MODULE define_julia_module(jlcxx::Module& module){
  auto t =  module.add_type<A>("A");
  module.method("f", f);
}
""")
end

julia_base=dirname(Sys.BINDIR)
cxxwrap_base = CxxWrap.prefix_path()

run(`g++ -fPIC -shared -o libMyTest.so -I$(julia_base)/include/julia -I$(cxxwrap_base)/include tmp.cc  -L$(cxxwrap_base)/lib`)

module MyTest

using CxxWrap
@wrapmodule(()->"./libMyTest.so")

function __init__()
    @initcxx
end

end #module

import .MyTest
println(typeof(MyTest.f()))

It works fine with CxxWrap 0.14.2 + libcxxwarp v0.11.2+1 and it gives above error with CxxWrap 0.15.0 + libcxxwrap v0.12.2+0

Philippe.