ext: Add pybind rev f4b81b3

Change-Id: I52e4fc9ebf2f59da57d8cf8f3e37cc79598c2f5f
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2229
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr>

1 files changed, 401 insertions, 0 deletions

diff --git a/ext/pybind11/tests/test_issues.cpp b/ext/pybind11/tests/test_issues.cpp
new file mode 100644
index 000000000..4c59a1b12
--- /dev/null
+++ b/ext/pybind11/tests/test_issues.cpp
@@ -0,0 +1,401 @@
+/*
+    tests/test_issues.cpp -- collection of testcases for miscellaneous issues
+
+    Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
+
+    All rights reserved. Use of this source code is governed by a
+    BSD-style license that can be found in the LICENSE file.
+*/
+
+#include "pybind11_tests.h"
+#include "constructor_stats.h"
+#include <pybind11/stl.h>
+#include <pybind11/operators.h>
+#include <pybind11/complex.h>
+
+#define TRACKERS(CLASS) CLASS() { print_default_created(this); } ~CLASS() { print_destroyed(this); }
+struct NestABase { int value = -2; TRACKERS(NestABase) };
+struct NestA : NestABase { int value = 3; NestA& operator+=(int i) { value += i; return *this; } TRACKERS(NestA) };
+struct NestB { NestA a; int value = 4; NestB& operator-=(int i) { value -= i; return *this; } TRACKERS(NestB) };
+struct NestC { NestB b; int value = 5; NestC& operator*=(int i) { value *= i; return *this; } TRACKERS(NestC) };
+
+/// #393
+class OpTest1 {};
+class OpTest2 {};
+
+OpTest1 operator+(const OpTest1 &, const OpTest1 &) {
+    py::print("Add OpTest1 with OpTest1");
+    return OpTest1();
+}
+OpTest2 operator+(const OpTest2 &, const OpTest2 &) {
+    py::print("Add OpTest2 with OpTest2");
+    return OpTest2();
+}
+OpTest2 operator+(const OpTest2 &, const OpTest1 &) {
+    py::print("Add OpTest2 with OpTest1");
+    return OpTest2();
+}
+
+// #461
+class Dupe1 {
+public:
+    Dupe1(int v) : v_{v} {}
+    int get_value() const { return v_; }
+private:
+    int v_;
+};
+class Dupe2 {};
+class Dupe3 {};
+class DupeException : public std::runtime_error {};
+
+// #478
+template <typename T> class custom_unique_ptr {
+public:
+    custom_unique_ptr() { print_default_created(this); }
+    custom_unique_ptr(T *ptr) : _ptr{ptr} { print_created(this, ptr); }
+    custom_unique_ptr(custom_unique_ptr<T> &&move) : _ptr{move._ptr} { move._ptr = nullptr; print_move_created(this); }
+    custom_unique_ptr &operator=(custom_unique_ptr<T> &&move) { print_move_assigned(this); if (_ptr) destruct_ptr(); _ptr = move._ptr; move._ptr = nullptr; return *this; }
+    custom_unique_ptr(const custom_unique_ptr<T> &) = delete;
+    void operator=(const custom_unique_ptr<T> &copy) = delete;
+    ~custom_unique_ptr() { print_destroyed(this); if (_ptr) destruct_ptr(); }
+private:
+    T *_ptr = nullptr;
+    void destruct_ptr() { delete _ptr; }
+};
+PYBIND11_DECLARE_HOLDER_TYPE(T, custom_unique_ptr<T>);
+
+/// Issue #528: templated constructor
+struct TplConstrClass {
+    template <typename T> TplConstrClass(const T &arg) : str{arg} {}
+    std::string str;
+    bool operator==(const TplConstrClass &t) const { return t.str == str; }
+};
+namespace std {
+template <> struct hash<TplConstrClass> { size_t operator()(const TplConstrClass &t) const { return std::hash<std::string>()(t.str); } };
+}
+
+
+void init_issues(py::module &m) {
+    py::module m2 = m.def_submodule("issues");
+
+#if !defined(_MSC_VER)
+    // Visual Studio 2015 currently cannot compile this test
+    // (see the comment in type_caster_base::make_copy_constructor)
+    // #70 compilation issue if operator new is not public
+    class NonConstructible { private: void *operator new(size_t bytes) throw(); };
+    py::class_<NonConstructible>(m, "Foo");
+    m2.def("getstmt", []() -> NonConstructible * { return nullptr; },
+        py::return_value_policy::reference);
+#endif
+
+    // #137: const char* isn't handled properly
+    m2.def("print_cchar", [](const char *s) { return std::string(s); });
+
+    // #150: char bindings broken
+    m2.def("print_char", [](char c) { return std::string(1, c); });
+
+    // #159: virtual function dispatch has problems with similar-named functions
+    struct Base { virtual std::string dispatch() const {
+        /* for some reason MSVC2015 can't compile this if the function is pure virtual */
+        return {};
+    }; };
+
+    struct DispatchIssue : Base {
+        virtual std::string dispatch() const {
+            PYBIND11_OVERLOAD_PURE(std::string, Base, dispatch, /* no arguments */);
+        }
+    };
+
+    py::class_<Base, DispatchIssue>(m2, "DispatchIssue")
+        .def(py::init<>())
+        .def("dispatch", &Base::dispatch);
+
+    m2.def("dispatch_issue_go", [](const Base * b) { return b->dispatch(); });
+
+    struct Placeholder { int i; Placeholder(int i) : i(i) { } };
+
+    py::class_<Placeholder>(m2, "Placeholder")
+        .def(py::init<int>())
+        .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", [](std::reference_wrapper<Placeholder> p4) {
+        Placeholder *p1 = new Placeholder{1};
+        Placeholder *p2 = new Placeholder{2};
+        Placeholder *p3 = new Placeholder{3};
+        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));
+        v.push_back(p4);
+        return v;
+    });
+
+    // #181: iterator passthrough did not compile
+    m2.def("iterator_passthrough", [](py::iterator s) -> py::iterator {
+        return py::make_iterator(std::begin(s), std::end(s));
+    });
+
+    // #187: issue involving std::shared_ptr<> return value policy & garbage collection
+    struct ElementBase { virtual void foo() { } /* Force creation of virtual table */ };
+    struct ElementA : ElementBase {
+        ElementA(int v) : v(v) { }
+        int value() { return v; }
+        int v;
+    };
+
+    struct ElementList {
+        void add(std::shared_ptr<ElementBase> e) { l.push_back(e); }
+        std::vector<std::shared_ptr<ElementBase>> l;
+    };
+
+    py::class_<ElementBase, std::shared_ptr<ElementBase>> (m2, "ElementBase");
+
+    py::class_<ElementA, ElementBase, std::shared_ptr<ElementA>>(m2, "ElementA")
+        .def(py::init<int>())
+        .def("value", &ElementA::value);
+
+    py::class_<ElementList, std::shared_ptr<ElementList>>(m2, "ElementList")
+        .def(py::init<>())
+        .def("add", &ElementList::add)
+        .def("get", [](ElementList &el) {
+            py::list list;
+            for (auto &e : el.l)
+                list.append(py::cast(e));
+            return list;
+        });
+
+    // (no id): should not be able to pass 'None' to a reference argument
+    m2.def("get_element", [](ElementA &el) { return el.value(); });
+
+    // (no id): don't cast doubles to ints
+    m2.def("expect_float", [](float f) { return f; });
+    m2.def("expect_int", [](int i) { return i; });
+
+    try {
+        py::class_<Placeholder>(m2, "Placeholder");
+        throw std::logic_error("Expected an exception!");
+    } catch (std::runtime_error &) {
+        /* All good */
+    }
+
+    // Issue #283: __str__ called on uninitialized instance when constructor arguments invalid
+    class StrIssue {
+    public:
+        StrIssue(int i) : val{i} {}
+        StrIssue() : StrIssue(-1) {}
+        int value() const { return val; }
+    private:
+        int val;
+    };
+    py::class_<StrIssue> si(m2, "StrIssue");
+    si  .def(py::init<int>())
+        .def(py::init<>())
+        .def("__str__", [](const StrIssue &si) { return "StrIssue[" + std::to_string(si.value()) + "]"; })
+        ;
+
+    // Issue #328: first member in a class can't be used in operators
+    py::class_<NestABase>(m2, "NestABase").def(py::init<>()).def_readwrite("value", &NestABase::value);
+    py::class_<NestA>(m2, "NestA").def(py::init<>()).def(py::self += int())
+        .def("as_base", [](NestA &a) -> NestABase& { return (NestABase&) a; }, py::return_value_policy::reference_internal);
+    py::class_<NestB>(m2, "NestB").def(py::init<>()).def(py::self -= int()).def_readwrite("a", &NestB::a);
+    py::class_<NestC>(m2, "NestC").def(py::init<>()).def(py::self *= int()).def_readwrite("b", &NestC::b);
+    m2.def("get_NestA", [](const NestA &a) { return a.value; });
+    m2.def("get_NestB", [](const NestB &b) { return b.value; });
+    m2.def("get_NestC", [](const NestC &c) { return c.value; });
+
+    // Issue 389: r_v_p::move should fall-through to copy on non-movable objects
+    class MoveIssue1 {
+    public:
+        MoveIssue1(int v) : v{v} {}
+        MoveIssue1(const MoveIssue1 &c) { v = c.v; }
+        MoveIssue1(MoveIssue1 &&) = delete;
+        int v;
+    };
+    class MoveIssue2 {
+    public:
+        MoveIssue2(int v) : v{v} {}
+        MoveIssue2(MoveIssue2 &&) = default;
+        int v;
+    };
+    py::class_<MoveIssue1>(m2, "MoveIssue1").def(py::init<int>()).def_readwrite("value", &MoveIssue1::v);
+    py::class_<MoveIssue2>(m2, "MoveIssue2").def(py::init<int>()).def_readwrite("value", &MoveIssue2::v);
+    m2.def("get_moveissue1", [](int i) -> MoveIssue1 * { return new MoveIssue1(i); }, py::return_value_policy::move);
+    m2.def("get_moveissue2", [](int i) { return MoveIssue2(i); }, py::return_value_policy::move);
+
+    // Issues 392/397: overridding reference-returning functions
+    class OverrideTest {
+    public:
+        struct A { std::string value = "hi"; };
+        std::string v;
+        A a;
+        explicit OverrideTest(const std::string &v) : v{v} {}
+        virtual std::string str_value() { return v; }
+        virtual std::string &str_ref() { return v; }
+        virtual A A_value() { return a; }
+        virtual A &A_ref() { return a; }
+    };
+    class PyOverrideTest : public OverrideTest {
+    public:
+        using OverrideTest::OverrideTest;
+        std::string str_value() override { PYBIND11_OVERLOAD(std::string, OverrideTest, str_value); }
+        // Not allowed (uncommenting should hit a static_assert failure): we can't get a reference
+        // to a python numeric value, since we only copy values in the numeric type caster:
+//      std::string &str_ref() override { PYBIND11_OVERLOAD(std::string &, OverrideTest, str_ref); }
+        // But we can work around it like this:
+    private:
+        std::string _tmp;
+        std::string str_ref_helper() { PYBIND11_OVERLOAD(std::string, OverrideTest, str_ref); }
+    public:
+        std::string &str_ref() override { return _tmp = str_ref_helper(); }
+
+        A A_value() override { PYBIND11_OVERLOAD(A, OverrideTest, A_value); }
+        A &A_ref() override { PYBIND11_OVERLOAD(A &, OverrideTest, A_ref); }
+    };
+    py::class_<OverrideTest::A>(m2, "OverrideTest_A")
+        .def_readwrite("value", &OverrideTest::A::value);
+    py::class_<OverrideTest, PyOverrideTest>(m2, "OverrideTest")
+        .def(py::init<const std::string &>())
+        .def("str_value", &OverrideTest::str_value)
+//      .def("str_ref", &OverrideTest::str_ref)
+        .def("A_value", &OverrideTest::A_value)
+        .def("A_ref", &OverrideTest::A_ref);
+
+    /// Issue 393: need to return NotSupported to ensure correct arithmetic operator behavior
+    py::class_<OpTest1>(m2, "OpTest1")
+        .def(py::init<>())
+        .def(py::self + py::self);
+
+    py::class_<OpTest2>(m2, "OpTest2")
+        .def(py::init<>())
+        .def(py::self + py::self)
+        .def("__add__", [](const OpTest2& c2, const OpTest1& c1) { return c2 + c1; })
+        .def("__radd__", [](const OpTest2& c2, const OpTest1& c1) { return c2 + c1; });
+
+    // Issue 388: Can't make iterators via make_iterator() with different r/v policies
+    static std::vector<int> list = { 1, 2, 3 };
+    m2.def("make_iterator_1", []() { return py::make_iterator<py::return_value_policy::copy>(list); });
+    m2.def("make_iterator_2", []() { return py::make_iterator<py::return_value_policy::automatic>(list); });
+
+    static std::vector<std::string> nothrows;
+    // Issue 461: registering two things with the same name:
+    py::class_<Dupe1>(m2, "Dupe1")
+        .def("get_value", &Dupe1::get_value)
+        ;
+    m2.def("dupe1_factory", [](int v) { return new Dupe1(v); });
+
+    py::class_<Dupe2>(m2, "Dupe2");
+    py::exception<DupeException>(m2, "DupeException");
+
+    try {
+        m2.def("Dupe1", [](int v) { return new Dupe1(v); });
+        nothrows.emplace_back("Dupe1");
+    }
+    catch (std::runtime_error &) {}
+    try {
+        py::class_<Dupe3>(m2, "dupe1_factory");
+        nothrows.emplace_back("dupe1_factory");
+    }
+    catch (std::runtime_error &) {}
+    try {
+        py::exception<Dupe3>(m2, "Dupe2");
+        nothrows.emplace_back("Dupe2");
+    }
+    catch (std::runtime_error &) {}
+    try {
+        m2.def("DupeException", []() { return 30; });
+        nothrows.emplace_back("DupeException1");
+    }
+    catch (std::runtime_error &) {}
+    try {
+        py::class_<DupeException>(m2, "DupeException");
+        nothrows.emplace_back("DupeException2");
+    }
+    catch (std::runtime_error &) {}
+    m2.def("dupe_exception_failures", []() {
+        py::list l;
+        for (auto &e : nothrows) l.append(py::cast(e));
+        return l;
+    });
+
+    /// Issue #471: shared pointer instance not dellocated
+    class SharedChild : public std::enable_shared_from_this<SharedChild> {
+    public:
+        SharedChild() { print_created(this); }
+        ~SharedChild() { print_destroyed(this); }
+    };
+
+    class SharedParent {
+    public:
+        SharedParent() : child(std::make_shared<SharedChild>()) { }
+        const SharedChild &get_child() const { return *child; }
+
+    private:
+        std::shared_ptr<SharedChild> child;
+    };
+
+    py::class_<SharedChild, std::shared_ptr<SharedChild>>(m, "SharedChild");
+    py::class_<SharedParent, std::shared_ptr<SharedParent>>(m, "SharedParent")
+        .def(py::init<>())
+        .def("get_child", &SharedParent::get_child, py::return_value_policy::reference);
+
+    /// Issue/PR #478: unique ptrs constructed and freed without destruction
+    class SpecialHolderObj {
+    public:
+        int val = 0;
+        SpecialHolderObj *ch = nullptr;
+        SpecialHolderObj(int v, bool make_child = true) : val{v}, ch{make_child ? new SpecialHolderObj(val+1, false) : nullptr}
+        { print_created(this, val); }
+        ~SpecialHolderObj() { delete ch; print_destroyed(this); }
+        SpecialHolderObj *child() { return ch; }
+    };
+
+    py::class_<SpecialHolderObj, custom_unique_ptr<SpecialHolderObj>>(m, "SpecialHolderObj")
+        .def(py::init<int>())
+        .def("child", &SpecialHolderObj::child, pybind11::return_value_policy::reference_internal)
+        .def_readwrite("val", &SpecialHolderObj::val)
+        .def_static("holder_cstats", &ConstructorStats::get<custom_unique_ptr<SpecialHolderObj>>,
+                py::return_value_policy::reference);
+
+    /// Issue #484: number conversion generates unhandled exceptions
+    m2.def("test_complex", [](float x) { py::print("{}"_s.format(x)); });
+    m2.def("test_complex", [](std::complex<float> x) { py::print("({}, {})"_s.format(x.real(), x.imag())); });
+
+    /// Issue #511: problem with inheritance + overwritten def_static
+    struct MyBase {
+        static std::unique_ptr<MyBase> make() {
+            return std::unique_ptr<MyBase>(new MyBase());
+        }
+    };
+
+    struct MyDerived : MyBase {
+        static std::unique_ptr<MyDerived> make() {
+            return std::unique_ptr<MyDerived>(new MyDerived());
+        }
+    };
+
+    py::class_<MyBase>(m2, "MyBase")
+        .def_static("make", &MyBase::make);
+
+    py::class_<MyDerived, MyBase>(m2, "MyDerived")
+        .def_static("make", &MyDerived::make)
+        .def_static("make2", &MyDerived::make);
+
+    py::dict d;
+    std::string bar = "bar";
+    d["str"] = bar;
+    d["num"] = 3.7;
+
+    /// Issue #528: templated constructor
+    m2.def("tpl_constr_vector", [](std::vector<TplConstrClass> &) {});
+    m2.def("tpl_constr_map", [](std::unordered_map<TplConstrClass, TplConstrClass> &) {});
+    m2.def("tpl_constr_set", [](std::unordered_set<TplConstrClass> &) {});
+#if defined(PYBIND11_HAS_OPTIONAL)
+    m2.def("tpl_constr_optional", [](std::optional<TplConstrClass> &) {});
+#elif defined(PYBIND11_HAS_EXP_OPTIONAL)
+    m2.def("tpl_constr_optional", [](std::experimental::optional<TplConstrClass> &) {});
+#endif
+}
+
+// MSVC workaround: trying to use a lambda here crashes MSCV
+test_initializer issues(&init_issues);