main.cpp

#include <pybind11/pybind11.h>

#define STRINGIFY(x) #x
#define MACRO_STRINGIFY(x) STRINGIFY(x)

int add(int i, int j) {
    return i + j;
}

struct AStruct {
    AStruct() {
    }
};
struct BStruct {
    BStruct(AStruct &a) {
    }
};

namespace py = pybind11;

PYBIND11_MODULE(cmake_example, m) {
    m.doc() = R"pbdoc(
        Pybind11 example plugin
        -----------------------

        .. currentmodule:: cmake_example

        .. autosummary::
           :toctree: _generate

           add
           subtract
    )pbdoc";

    m.def("add", &add, R"pbdoc(
        Add two numbers

        Some other explanation about the add function.
    )pbdoc");

    m.def("subtract", [](int i, int j) { return i - j; }, R"pbdoc(
        Subtract two numbers

        Some other explanation about the subtract function.
    )pbdoc");

    py::class_<AStruct>(m, "AStruct", py::metaclass((PyObject *) &PyType_Type)).def(py::init<>());
    py::class_<BStruct>(m, "BStruct", py::metaclass((PyObject *) &PyType_Type)).def(py::init<AStruct&>());

    m.def("fun", [](AStruct &a) { return 44; }, "doc", py::arg("a") );

#ifdef VERSION_INFO
    m.attr("__version__") = MACRO_STRINGIFY(VERSION_INFO);
#else
    m.attr("__version__") = "dev";
#endif
}