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#include <map>
#include <string>
#include <unordered_map>
#include <vector>
#include <nanobind/stl/bind_map.h>
#include <nanobind/stl/string.h>
#include <nanobind/stl/vector.h>
namespace nb = nanobind;
// testing for insertion of non-copyable class
class E_nc {
public:
explicit E_nc(int i) : value{i} {}
E_nc(const E_nc &) = delete;
E_nc &operator=(const E_nc &) = delete;
E_nc(E_nc &&) = default;
E_nc &operator=(E_nc &&) = default;
int value;
};
template <class Map>
Map *times_ten(int n) {
auto *m = new Map();
for (int i = 1; i <= n; i++) {
m->emplace(int(i), E_nc(10 * i));
}
return m;
}
template <class NestMap>
NestMap *times_hundred(int n) {
auto *m = new NestMap();
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
(*m)[i].emplace(int(j * 10), E_nc(100 * j));
}
}
return m;
}
NB_MODULE(test_stl_bind_map_ext, m) {
// test_map_string_double
nb::bind_map<std::map<std::string, double>>(m, "MapStringDouble");
nb::bind_map<std::unordered_map<std::string, double>>(m, "UnorderedMapStringDouble");
// test_map_string_double_const
nb::bind_map<std::map<std::string, double const>>(m, "MapStringDoubleConst");
nb::bind_map<std::unordered_map<std::string, double const>>(m,
"UnorderedMapStringDoubleConst");
nb::class_<E_nc>(m, "ENC").def(nb::init<int>()).def_rw("value", &E_nc::value);
// On Windows, NVCC has difficulties with the following code. My guess is that
// decltype() in the iterator_value_access macro used in bind_map.h loses a reference.
#if defined(_WIN32) && !defined(__CUDACC__)
// By default, the bindings produce a __getitem__ that makes a copy, which
// won't take this non-copyable type: (uncomment to verify build error)
//nb::bind_map<std::map<int, E_nc>>(m, "MapENC");
//nb::bind_map<std::unordered_map<int, E_nc>>(m, "UmapENC");
// But we can request reference semantics instead (some care required, read
// the documentation):
nb::bind_map<std::map<int, E_nc>,
nb::rv_policy::reference_internal>(m, "MapENC");
nb::bind_map<std::unordered_map<int, E_nc>,
nb::rv_policy::reference_internal>(m, "UmapENC");
m.def("get_mnc", ×_ten<std::map<int, E_nc>>);
m.def("get_umnc", ×_ten<std::unordered_map<int, E_nc>>);
// pybind11 issue #1885: binding nested std::map<X, Container<E>>
// with E non-copyable
nb::bind_map<std::map<int, std::vector<E_nc>>,
nb::rv_policy::reference_internal>(m, "MapVecENC");
m.def("get_nvnc", [](int n) {
auto *m = new std::map<int, std::vector<E_nc>>();
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
(*m)[i].emplace_back(j);
}
}
return m;
});
nb::bind_map<std::map<int, std::map<int, E_nc>>,
nb::rv_policy::reference_internal>(m, "MapMapENC");
m.def("get_nmnc", ×_hundred<std::map<int, std::map<int, E_nc>>>);
nb::bind_map<std::unordered_map<int, std::unordered_map<int, E_nc>>,
nb::rv_policy::reference_internal>(m, "UmapUmapENC");
m.def("get_numnc", ×_hundred<std::unordered_map<int, std::unordered_map<int, E_nc>>>);
#endif
}
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