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added testcase for issue #187
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@ -10,6 +10,8 @@
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#include "example.h"
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#include <pybind11/stl.h>
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PYBIND11_DECLARE_HOLDER_TYPE(T, std::shared_ptr<T>);
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void init_issues(py::module &m) {
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py::module m2 = m.def_submodule("issues");
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@ -20,7 +22,9 @@ void init_issues(py::module &m) {
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m2.def("print_char", [](char c) { std::cout << c << std::endl; });
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// #159: virtual function dispatch has problems with similar-named functions
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struct Base { virtual void dispatch(void) const = 0; };
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struct Base { virtual void dispatch(void) const {
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/* for some reason MSVC2015 can't compile this if the function is pure virtual */
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}; };
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struct DispatchIssue : Base {
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virtual void dispatch(void) const {
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@ -58,4 +62,33 @@ void init_issues(py::module &m) {
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m2.def("iterator_passthrough", [](py::iterator s) -> py::iterator {
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return py::make_iterator(std::begin(s), std::end(s));
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});
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}
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// #187: issue involving std::shared_ptr<> return value policy & garbage collection
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struct ElementBase { virtual void foo() { } /* Force creation of virtual table */ };
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struct ElementA : ElementBase {
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ElementA(int v) : v(v) { }
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int value() { return v; }
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int v;
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};
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struct ElementList {
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void add(std::shared_ptr<ElementBase> e) { l.push_back(e); }
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std::vector<std::shared_ptr<ElementBase>> l;
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};
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py::class_<ElementBase, std::shared_ptr<ElementBase>> (m2, "ElementBase");
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py::class_<ElementA, std::shared_ptr<ElementA>>(m2, "ElementA", py::base<ElementBase>())
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.def(py::init<int>())
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.def("value", &ElementA::value);
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py::class_<ElementList, std::shared_ptr<ElementList>>(m2, "ElementList")
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.def(py::init<>())
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.def("add", &ElementList::add)
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.def("get", [](ElementList &el){
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py::list list;
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for (auto &e : el.l)
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list.append(py::cast(e));
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return list;
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});
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};
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@ -5,8 +5,10 @@ sys.path.append('.')
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from example.issues import print_cchar, print_char
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from example.issues import DispatchIssue, dispatch_issue_go
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from example.issues import Placeholder ,return_vec_of_reference_wrapper
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from example.issues import Placeholder, return_vec_of_reference_wrapper
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from example.issues import iterator_passthrough
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from example.issues import ElementList, ElementA
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import gc
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print_cchar("const char *")
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print_char('c')
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@ -32,3 +34,11 @@ dispatch_issue_go(b)
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print(return_vec_of_reference_wrapper(Placeholder(4)))
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print(list(iterator_passthrough(iter([3, 5, 7, 9, 11, 13, 15]))))
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el = ElementList()
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for i in range(10):
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el.add(ElementA(i))
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gc.collect()
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for i, v in enumerate(el.get()):
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print("%i==%i, " % (i, v.value()), end='')
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print()
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@ -4,3 +4,4 @@ Failed as expected: Tried to call pure virtual function "dispatch"
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Yay..
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[Placeholder[1], Placeholder[2], Placeholder[3], Placeholder[4]]
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[3, 5, 7, 9, 11, 13, 15]
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0==0, 1==1, 2==2, 3==3, 4==4, 5==5, 6==6, 7==7, 8==8, 9==9,
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