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added caster for std::reference_wrapper (fixes #171)

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This commit is contained in:
Wenzel Jakob
2016-04-20 17:00:57 +02:00
parent afb9c1776a
commit f54ded74f1
4 changed files with 31 additions and 9 deletions
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29
example/issues.cpp
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@@ -8,6 +8,7 @@
*/
#include "example.h"
#include <pybind11/stl.h>
struct Base {
virtual void dispatch(void) const = 0;
@@ -19,15 +20,10 @@ struct DispatchIssue : Base {
}
};
struct Placeholder { int i; };
void dispatch_issue_go(const Base * b) { b->dispatch(); }
PYBIND11_PLUGIN(mytest)
{
pybind11::module m("mytest", "A test");
return m.ptr();
}
void init_issues(py::module &m) {
py::module m2 = m.def_submodule("issues");
@@ -38,10 +34,25 @@ void init_issues(py::module &m) {
m2.def("print_char", [](char c) { std::cout << c << std::endl; });
// #159: virtual function dispatch has problems with similar-named functions
pybind11::class_<DispatchIssue> base(m2, "DispatchIssue");
py::class_<DispatchIssue> base(m2, "DispatchIssue");
base.alias<Base>()
.def(pybind11::init<>())
.def(py::init<>())
.def("dispatch", &Base::dispatch);
m2.def("dispatch_issue_go", &dispatch_issue_go);
py::class_<Placeholder>(m2, "Placeholder")
.def("__repr__", [](const Placeholder &p) { return "Placeholder[" + std::to_string(p.i) + "]"; });
// #171: Can't return reference wrappers (or STL datastructures containing them)
m2.def("return_vec_of_reference_wrapper", [] {
Placeholder *p1 = new Placeholder{1};
Placeholder *p2 = new Placeholder{2};
Placeholder *p3 = new Placeholder{2};
std::vector<std::reference_wrapper<Placeholder>> v;
v.push_back(std::ref(*p1));
v.push_back(std::ref(*p2));
v.push_back(std::ref(*p3));
return v;
});
}