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Shuffling code in test_multiple_inheritance.cpp to separate struct/class definitions from bindings code. #2890

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Merged
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Mar 5, 2021
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Shuffling code in test_multiple_inheritance.cpp to separate struct/class definitions from bindings code. #2890

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46 changes: 29 additions & 17 deletions tests/test_multiple_inheritance.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,8 @@
#include "pybind11_tests.h"
#include "constructor_stats.h"

namespace {

// 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 {
Expand Down Expand Up @@ -43,7 +45,34 @@ int WithStatic2::static_value2 = 2;
int VanillaStaticMix1::static_value = 12;
int VanillaStaticMix2::static_value = 12;

// test_multiple_inheritance_virtbase
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_mi_unaligned_base
// test_mi_base_return
struct I801B1 { int a = 1; I801B1() = default; I801B1(const I801B1 &) = default; virtual ~I801B1() = default; };
struct I801B2 { int b = 2; I801B2() = default; I801B2(const I801B2 &) = default; virtual ~I801B2() = default; };
struct I801C : I801B1, I801B2 {};
struct I801D : I801C {}; // Indirect MI

} // namespace

TEST_SUBMODULE(multiple_inheritance, m) {
// Please do not interleave `struct` and `class` definitions with bindings code,
// but implement `struct`s and `class`es in the anonymous namespace above.
// This helps keeping the smart_holder branch in sync with master.

// test_multiple_inheritance_mix1
// test_multiple_inheritance_mix2
Expand Down Expand Up @@ -99,27 +128,14 @@ TEST_SUBMODULE(multiple_inheritance, 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>());
Expand All @@ -130,10 +146,6 @@ TEST_SUBMODULE(multiple_inheritance, m) {
// test_mi_unaligned_base
// test_mi_base_return
// Issue #801: invalid casting to derived type with MI bases
struct I801B1 { int a = 1; I801B1() = default; I801B1(const I801B1 &) = default; virtual ~I801B1() = default; };
struct I801B2 { int b = 2; I801B2() = default; I801B2(const I801B2 &) = default; 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 {};
Expand Down