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-rw-r--r--ext/pybind11/tests/test_multiple_inheritance.cpp208
1 files changed, 133 insertions, 75 deletions
diff --git a/ext/pybind11/tests/test_multiple_inheritance.cpp b/ext/pybind11/tests/test_multiple_inheritance.cpp
index 3ebeb202b..35f9d9c4e 100644
--- a/ext/pybind11/tests/test_multiple_inheritance.cpp
+++ b/ext/pybind11/tests/test_multiple_inheritance.cpp
@@ -9,41 +9,83 @@
*/
#include "pybind11_tests.h"
+#include "constructor_stats.h"
-struct Base1 {
- Base1(int i) : i(i) { }
- int foo() { return i; }
+// Many bases for testing that multiple inheritance from many classes (i.e. requiring extra
+// space for holder constructed flags) works.
+template <int N> struct BaseN {
+ BaseN(int i) : i(i) { }
int i;
};
-struct Base2 {
- Base2(int i) : i(i) { }
- int bar() { return i; }
- int i;
+// test_mi_static_properties
+struct Vanilla {
+ std::string vanilla() { return "Vanilla"; };
};
-
-struct Base12 : Base1, Base2 {
- Base12(int i, int j) : Base1(i), Base2(j) { }
+struct WithStatic1 {
+ static std::string static_func1() { return "WithStatic1"; };
+ static int static_value1;
};
-
-struct MIType : Base12 {
- MIType(int i, int j) : Base12(i, j) { }
+struct WithStatic2 {
+ static std::string static_func2() { return "WithStatic2"; };
+ static int static_value2;
};
+struct VanillaStaticMix1 : Vanilla, WithStatic1, WithStatic2 {
+ static std::string static_func() { return "VanillaStaticMix1"; }
+ static int static_value;
+};
+struct VanillaStaticMix2 : WithStatic1, Vanilla, WithStatic2 {
+ static std::string static_func() { return "VanillaStaticMix2"; }
+ static int static_value;
+};
+int WithStatic1::static_value1 = 1;
+int WithStatic2::static_value2 = 2;
+int VanillaStaticMix1::static_value = 12;
+int VanillaStaticMix2::static_value = 12;
-test_initializer multiple_inheritance([](py::module &m) {
+TEST_SUBMODULE(multiple_inheritance, m) {
+
+ // test_multiple_inheritance_mix1
+ // test_multiple_inheritance_mix2
+ struct Base1 {
+ Base1(int i) : i(i) { }
+ int foo() { return i; }
+ int i;
+ };
py::class_<Base1> b1(m, "Base1");
b1.def(py::init<int>())
.def("foo", &Base1::foo);
+ struct Base2 {
+ Base2(int i) : i(i) { }
+ int bar() { return i; }
+ int i;
+ };
py::class_<Base2> b2(m, "Base2");
b2.def(py::init<int>())
.def("bar", &Base2::bar);
- py::class_<Base12, Base1, Base2>(m, "Base12");
+ // test_multiple_inheritance_cpp
+ struct Base12 : Base1, Base2 {
+ Base12(int i, int j) : Base1(i), Base2(j) { }
+ };
+ struct MIType : Base12 {
+ MIType(int i, int j) : Base12(i, j) { }
+ };
+ py::class_<Base12, Base1, Base2>(m, "Base12");
py::class_<MIType, Base12>(m, "MIType")
.def(py::init<int, int>());
+
+ // test_multiple_inheritance_python_many_bases
+ #define PYBIND11_BASEN(N) py::class_<BaseN<N>>(m, "BaseN" #N).def(py::init<int>()).def("f" #N, [](BaseN<N> &b) { return b.i + N; })
+ PYBIND11_BASEN( 1); PYBIND11_BASEN( 2); PYBIND11_BASEN( 3); PYBIND11_BASEN( 4);
+ PYBIND11_BASEN( 5); PYBIND11_BASEN( 6); PYBIND11_BASEN( 7); PYBIND11_BASEN( 8);
+ PYBIND11_BASEN( 9); PYBIND11_BASEN(10); PYBIND11_BASEN(11); PYBIND11_BASEN(12);
+ PYBIND11_BASEN(13); PYBIND11_BASEN(14); PYBIND11_BASEN(15); PYBIND11_BASEN(16);
+ PYBIND11_BASEN(17);
+
// Uncommenting this should result in a compile time failure (MI can only be specified via
// template parameters because pybind has to know the types involved; see discussion in #742 for
// details).
@@ -52,82 +94,78 @@ test_initializer multiple_inheritance([](py::module &m) {
// };
// py::class_<Base12v2>(m, "Base12v2", b1, b2)
// .def(py::init<int, int>());
-});
-
-/* Test the case where not all base classes are specified,
- and where pybind11 requires the py::multiple_inheritance
- flag to perform proper casting between types */
-
-struct Base1a {
- Base1a(int i) : i(i) { }
- int foo() { return i; }
- int i;
-};
-
-struct Base2a {
- Base2a(int i) : i(i) { }
- int bar() { return i; }
- int i;
-};
-struct Base12a : Base1a, Base2a {
- Base12a(int i, int j) : Base1a(i), Base2a(j) { }
-};
-test_initializer multiple_inheritance_nonexplicit([](py::module &m) {
+ // test_multiple_inheritance_virtbase
+ // Test the case where not all base classes are specified, and where pybind11 requires the
+ // py::multiple_inheritance flag to perform proper casting between types.
+ struct Base1a {
+ Base1a(int i) : i(i) { }
+ int foo() { return i; }
+ int i;
+ };
py::class_<Base1a, std::shared_ptr<Base1a>>(m, "Base1a")
.def(py::init<int>())
.def("foo", &Base1a::foo);
+ struct Base2a {
+ Base2a(int i) : i(i) { }
+ int bar() { return i; }
+ int i;
+ };
py::class_<Base2a, std::shared_ptr<Base2a>>(m, "Base2a")
.def(py::init<int>())
.def("bar", &Base2a::bar);
+ struct Base12a : Base1a, Base2a {
+ Base12a(int i, int j) : Base1a(i), Base2a(j) { }
+ };
py::class_<Base12a, /* Base1 missing */ Base2a,
std::shared_ptr<Base12a>>(m, "Base12a", py::multiple_inheritance())
.def(py::init<int, int>());
m.def("bar_base2a", [](Base2a *b) { return b->bar(); });
m.def("bar_base2a_sharedptr", [](std::shared_ptr<Base2a> b) { return b->bar(); });
-});
-
-struct Vanilla {
- std::string vanilla() { return "Vanilla"; };
-};
-
-struct WithStatic1 {
- static std::string static_func1() { return "WithStatic1"; };
- static int static_value1;
-};
-
-struct WithStatic2 {
- static std::string static_func2() { return "WithStatic2"; };
- static int static_value2;
-};
-
-struct WithDict { };
-
-struct VanillaStaticMix1 : Vanilla, WithStatic1, WithStatic2 {
- static std::string static_func() { return "VanillaStaticMix1"; }
- static int static_value;
-};
-
-struct VanillaStaticMix2 : WithStatic1, Vanilla, WithStatic2 {
- static std::string static_func() { return "VanillaStaticMix2"; }
- static int static_value;
-};
-
-struct VanillaDictMix1 : Vanilla, WithDict { };
-struct VanillaDictMix2 : WithDict, Vanilla { };
-
-int WithStatic1::static_value1 = 1;
-int WithStatic2::static_value2 = 2;
-int VanillaStaticMix1::static_value = 12;
-int VanillaStaticMix2::static_value = 12;
-
-test_initializer mi_static_properties([](py::module &pm) {
- auto m = pm.def_submodule("mi");
+ // test_mi_unaligned_base
+ // test_mi_base_return
+ // Issue #801: invalid casting to derived type with MI bases
+ struct I801B1 { int a = 1; virtual ~I801B1() = default; };
+ struct I801B2 { int b = 2; virtual ~I801B2() = default; };
+ struct I801C : I801B1, I801B2 {};
+ struct I801D : I801C {}; // Indirect MI
+ // Unregistered classes:
+ struct I801B3 { int c = 3; virtual ~I801B3() = default; };
+ struct I801E : I801B3, I801D {};
+
+ py::class_<I801B1, std::shared_ptr<I801B1>>(m, "I801B1").def(py::init<>()).def_readonly("a", &I801B1::a);
+ py::class_<I801B2, std::shared_ptr<I801B2>>(m, "I801B2").def(py::init<>()).def_readonly("b", &I801B2::b);
+ py::class_<I801C, I801B1, I801B2, std::shared_ptr<I801C>>(m, "I801C").def(py::init<>());
+ py::class_<I801D, I801C, std::shared_ptr<I801D>>(m, "I801D").def(py::init<>());
+
+ // Two separate issues here: first, we want to recognize a pointer to a base type as being a
+ // known instance even when the pointer value is unequal (i.e. due to a non-first
+ // multiple-inheritance base class):
+ m.def("i801b1_c", [](I801C *c) { return static_cast<I801B1 *>(c); });
+ m.def("i801b2_c", [](I801C *c) { return static_cast<I801B2 *>(c); });
+ m.def("i801b1_d", [](I801D *d) { return static_cast<I801B1 *>(d); });
+ m.def("i801b2_d", [](I801D *d) { return static_cast<I801B2 *>(d); });
+
+ // Second, when returned a base class pointer to a derived instance, we cannot assume that the
+ // pointer is `reinterpret_cast`able to the derived pointer because, like above, the base class
+ // pointer could be offset.
+ m.def("i801c_b1", []() -> I801B1 * { return new I801C(); });
+ m.def("i801c_b2", []() -> I801B2 * { return new I801C(); });
+ m.def("i801d_b1", []() -> I801B1 * { return new I801D(); });
+ m.def("i801d_b2", []() -> I801B2 * { return new I801D(); });
+
+ // Return a base class pointer to a pybind-registered type when the actual derived type
+ // isn't pybind-registered (and uses multiple-inheritance to offset the pybind base)
+ m.def("i801e_c", []() -> I801C * { return new I801E(); });
+ m.def("i801e_b2", []() -> I801B2 * { return new I801E(); });
+
+
+ // test_mi_static_properties
py::class_<Vanilla>(m, "Vanilla")
.def(py::init<>())
.def("vanilla", &Vanilla::vanilla);
@@ -154,9 +192,29 @@ test_initializer mi_static_properties([](py::module &pm) {
.def_static("static_func", &VanillaStaticMix2::static_func)
.def_readwrite_static("static_value", &VanillaStaticMix2::static_value);
+
#if !defined(PYPY_VERSION)
+ struct WithDict { };
+ struct VanillaDictMix1 : Vanilla, WithDict { };
+ struct VanillaDictMix2 : WithDict, Vanilla { };
py::class_<WithDict>(m, "WithDict", py::dynamic_attr()).def(py::init<>());
py::class_<VanillaDictMix1, Vanilla, WithDict>(m, "VanillaDictMix1").def(py::init<>());
py::class_<VanillaDictMix2, WithDict, Vanilla>(m, "VanillaDictMix2").def(py::init<>());
#endif
-});
+
+ // test_diamond_inheritance
+ // Issue #959: segfault when constructing diamond inheritance instance
+ // All of these have int members so that there will be various unequal pointers involved.
+ struct B { int b; virtual ~B() = default; };
+ struct C0 : public virtual B { int c0; };
+ struct C1 : public virtual B { int c1; };
+ struct D : public C0, public C1 { int d; };
+ py::class_<B>(m, "B")
+ .def("b", [](B *self) { return self; });
+ py::class_<C0, B>(m, "C0")
+ .def("c0", [](C0 *self) { return self; });
+ py::class_<C1, B>(m, "C1")
+ .def("c1", [](C1 *self) { return self; });
+ py::class_<D, C0, C1>(m, "D")
+ .def(py::init<>());
+}
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