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62 lines
2.2 KiB
62 lines
2.2 KiB
/*
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example/example14.cpp -- opaque types, passing void pointers
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Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE file.
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*/
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#include "example.h"
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#include <pybind11/stl.h>
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#include <vector>
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typedef std::vector<std::string> StringList;
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class ClassWithSTLVecProperty {
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public:
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StringList stringList;
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};
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/* IMPORTANT: Disable internal pybind11 translation mechanisms for STL data structures */
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PYBIND11_MAKE_OPAQUE(StringList);
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void init_ex14(py::module &m) {
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py::class_<StringList>(m, "StringList")
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.def(py::init<>())
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.def("pop_back", &StringList::pop_back)
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/* There are multiple versions of push_back(), etc. Select the right ones. */
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.def("push_back", (void (StringList::*)(const std::string &)) &StringList::push_back)
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.def("back", (std::string &(StringList::*)()) &StringList::back)
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.def("__len__", [](const StringList &v) { return v.size(); })
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.def("__iter__", [](StringList &v) {
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return py::make_iterator(v.begin(), v.end());
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}, py::keep_alive<0, 1>());
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py::class_<ClassWithSTLVecProperty>(m, "ClassWithSTLVecProperty")
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.def(py::init<>())
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.def_readwrite("stringList", &ClassWithSTLVecProperty::stringList);
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m.def("print_opaque_list", [](const StringList &l) {
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std::cout << "Opaque list: [";
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bool first = true;
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for (auto entry : l) {
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if (!first)
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std::cout << ", ";
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std::cout << entry;
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first = false;
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}
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std::cout << "]" << std::endl;
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});
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m.def("return_void_ptr", []() { return (void *) 0x1234; });
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m.def("print_void_ptr", [](void *ptr) { std::cout << "Got void ptr : 0x" << std::hex << (uint64_t) ptr << std::endl; });
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m.def("return_null_str", []() { return (char *) nullptr; });
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m.def("print_null_str", [](char *ptr) { std::cout << "Got null str : 0x" << std::hex << (uint64_t) ptr << std::endl; });
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m.def("return_unique_ptr", []() -> std::unique_ptr<StringList> {
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StringList *result = new StringList();
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result->push_back("some value");
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return std::unique_ptr<StringList>(result);
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});
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}
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