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example.cpp

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extern "C" {

#include <examplemodule.h>

// Here we implement the function using C++ code, but since it's

// declaration has to be compatible with C everything goes in extern "C" scope.

mp_obj_t cppfunc(mp_obj_t a_obj, mp_obj_t b_obj) {

// Prove we have (at least) C++11 features.

const auto a = mp_obj_get_int(a_obj);

const auto b = mp_obj_get_int(b_obj);

const auto sum = [&]() {

return mp_obj_new_int(a + b);

} ();

// Prove we're being scanned for QSTRs.

mp_obj_t tup[] = {sum, MP_ROM_QSTR(MP_QSTR_hellocpp)};

return mp_obj_new_tuple(2, tup);

}

}