mirror of
https://github.com/pybind/pybind11.git
synced 2024-11-14 09:34:46 +00:00
60526d4636
This changes the pointer `cast()` in `PYBIND11_TYPE_CASTER` to recognize
the `take_ownership` policy: if casting a pointer with take-ownership,
the `cast()` now recalls `cast()` with a dereferenced rvalue (rather
than the previous code, which was always calling it with a const lvalue
reference), and deletes the pointer after the chained `cast()` is
complete.
This makes code like:
m.def("f", []() { return new std::vector<int>(100, 1); },
py::return_value_policy::take_ownership);
do the expected thing by taking over ownership of the returned pointer
(which is deleted once the chained cast completes).
436 lines
21 KiB
C++
436 lines
21 KiB
C++
/*
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tests/test_methods_and_attributes.cpp -- constructors, deconstructors, attribute access,
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__str__, argument and return value conventions
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Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE file.
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*/
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#include "pybind11_tests.h"
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#include "constructor_stats.h"
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class ExampleMandA {
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public:
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ExampleMandA() { print_default_created(this); }
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ExampleMandA(int value) : value(value) { print_created(this, value); }
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ExampleMandA(const ExampleMandA &e) : value(e.value) { print_copy_created(this); }
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ExampleMandA(ExampleMandA &&e) : value(e.value) { print_move_created(this); }
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~ExampleMandA() { print_destroyed(this); }
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std::string toString() {
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return "ExampleMandA[value=" + std::to_string(value) + "]";
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}
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void operator=(const ExampleMandA &e) { print_copy_assigned(this); value = e.value; }
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void operator=(ExampleMandA &&e) { print_move_assigned(this); value = e.value; }
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void add1(ExampleMandA other) { value += other.value; } // passing by value
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void add2(ExampleMandA &other) { value += other.value; } // passing by reference
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void add3(const ExampleMandA &other) { value += other.value; } // passing by const reference
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void add4(ExampleMandA *other) { value += other->value; } // passing by pointer
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void add5(const ExampleMandA *other) { value += other->value; } // passing by const pointer
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void add6(int other) { value += other; } // passing by value
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void add7(int &other) { value += other; } // passing by reference
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void add8(const int &other) { value += other; } // passing by const reference
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void add9(int *other) { value += *other; } // passing by pointer
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void add10(const int *other) { value += *other; } // passing by const pointer
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ExampleMandA self1() { return *this; } // return by value
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ExampleMandA &self2() { return *this; } // return by reference
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const ExampleMandA &self3() { return *this; } // return by const reference
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ExampleMandA *self4() { return this; } // return by pointer
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const ExampleMandA *self5() { return this; } // return by const pointer
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int internal1() { return value; } // return by value
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int &internal2() { return value; } // return by reference
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const int &internal3() { return value; } // return by const reference
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int *internal4() { return &value; } // return by pointer
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const int *internal5() { return &value; } // return by const pointer
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py::str overloaded(int, float) { return "(int, float)"; }
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py::str overloaded(float, int) { return "(float, int)"; }
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py::str overloaded(int, int) { return "(int, int)"; }
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py::str overloaded(float, float) { return "(float, float)"; }
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py::str overloaded(int, float) const { return "(int, float) const"; }
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py::str overloaded(float, int) const { return "(float, int) const"; }
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py::str overloaded(int, int) const { return "(int, int) const"; }
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py::str overloaded(float, float) const { return "(float, float) const"; }
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static py::str overloaded() { return "static"; }
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int value = 0;
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};
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struct TestProperties {
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int value = 1;
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static int static_value;
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int get() const { return value; }
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void set(int v) { value = v; }
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static int static_get() { return static_value; }
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static void static_set(int v) { static_value = v; }
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};
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int TestProperties::static_value = 1;
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struct TestPropertiesOverride : TestProperties {
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int value = 99;
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static int static_value;
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};
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int TestPropertiesOverride::static_value = 99;
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struct SimpleValue { int value = 1; };
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struct TestPropRVP {
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SimpleValue v1;
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SimpleValue v2;
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static SimpleValue sv1;
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static SimpleValue sv2;
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const SimpleValue &get1() const { return v1; }
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const SimpleValue &get2() const { return v2; }
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SimpleValue get_rvalue() const { return v2; }
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void set1(int v) { v1.value = v; }
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void set2(int v) { v2.value = v; }
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};
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SimpleValue TestPropRVP::sv1{};
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SimpleValue TestPropRVP::sv2{};
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class DynamicClass {
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public:
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DynamicClass() { print_default_created(this); }
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~DynamicClass() { print_destroyed(this); }
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};
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class CppDerivedDynamicClass : public DynamicClass { };
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// py::arg/py::arg_v testing: these arguments just record their argument when invoked
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class ArgInspector1 { public: std::string arg = "(default arg inspector 1)"; };
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class ArgInspector2 { public: std::string arg = "(default arg inspector 2)"; };
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class ArgAlwaysConverts { };
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namespace pybind11 { namespace detail {
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template <> struct type_caster<ArgInspector1> {
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public:
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PYBIND11_TYPE_CASTER(ArgInspector1, _("ArgInspector1"));
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bool load(handle src, bool convert) {
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value.arg = "loading ArgInspector1 argument " +
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std::string(convert ? "WITH" : "WITHOUT") + " conversion allowed. "
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"Argument value = " + (std::string) str(src);
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return true;
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}
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static handle cast(const ArgInspector1 &src, return_value_policy, handle) {
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return str(src.arg).release();
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}
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};
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template <> struct type_caster<ArgInspector2> {
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public:
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PYBIND11_TYPE_CASTER(ArgInspector2, _("ArgInspector2"));
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bool load(handle src, bool convert) {
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value.arg = "loading ArgInspector2 argument " +
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std::string(convert ? "WITH" : "WITHOUT") + " conversion allowed. "
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"Argument value = " + (std::string) str(src);
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return true;
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}
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static handle cast(const ArgInspector2 &src, return_value_policy, handle) {
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return str(src.arg).release();
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}
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};
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template <> struct type_caster<ArgAlwaysConverts> {
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public:
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PYBIND11_TYPE_CASTER(ArgAlwaysConverts, _("ArgAlwaysConverts"));
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bool load(handle, bool convert) {
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return convert;
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}
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static handle cast(const ArgAlwaysConverts &, return_value_policy, handle) {
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return py::none().release();
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}
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};
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}}
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// test_custom_caster_destruction
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class DestructionTester {
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public:
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DestructionTester() { print_default_created(this); }
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~DestructionTester() { print_destroyed(this); }
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DestructionTester(const DestructionTester &) { print_copy_created(this); }
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DestructionTester(DestructionTester &&) { print_move_created(this); }
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DestructionTester &operator=(const DestructionTester &) { print_copy_assigned(this); return *this; }
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DestructionTester &operator=(DestructionTester &&) { print_move_assigned(this); return *this; }
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};
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namespace pybind11 { namespace detail {
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template <> struct type_caster<DestructionTester> {
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PYBIND11_TYPE_CASTER(DestructionTester, _("DestructionTester"));
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bool load(handle, bool) { return true; }
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static handle cast(const DestructionTester &, return_value_policy, handle) {
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return py::bool_(true).release();
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}
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};
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}}
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// Issue/PR #648: bad arg default debugging output
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class NotRegistered {};
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// Test None-allowed py::arg argument policy
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class NoneTester { public: int answer = 42; };
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int none1(const NoneTester &obj) { return obj.answer; }
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int none2(NoneTester *obj) { return obj ? obj->answer : -1; }
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int none3(std::shared_ptr<NoneTester> &obj) { return obj ? obj->answer : -1; }
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int none4(std::shared_ptr<NoneTester> *obj) { return obj && *obj ? (*obj)->answer : -1; }
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int none5(std::shared_ptr<NoneTester> obj) { return obj ? obj->answer : -1; }
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struct StrIssue {
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int val = -1;
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StrIssue() = default;
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StrIssue(int i) : val{i} {}
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};
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// Issues #854, #910: incompatible function args when member function/pointer is in unregistered base class
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class UnregisteredBase {
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public:
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void do_nothing() const {}
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void increase_value() { rw_value++; ro_value += 0.25; }
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void set_int(int v) { rw_value = v; }
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int get_int() const { return rw_value; }
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double get_double() const { return ro_value; }
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int rw_value = 42;
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double ro_value = 1.25;
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};
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class RegisteredDerived : public UnregisteredBase {
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public:
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using UnregisteredBase::UnregisteredBase;
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double sum() const { return rw_value + ro_value; }
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};
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test_initializer methods_and_attributes([](py::module &m) {
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py::class_<ExampleMandA> emna(m, "ExampleMandA");
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emna.def(py::init<>())
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.def(py::init<int>())
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.def(py::init<const ExampleMandA&>())
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.def("add1", &ExampleMandA::add1)
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.def("add2", &ExampleMandA::add2)
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.def("add3", &ExampleMandA::add3)
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.def("add4", &ExampleMandA::add4)
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.def("add5", &ExampleMandA::add5)
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.def("add6", &ExampleMandA::add6)
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.def("add7", &ExampleMandA::add7)
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.def("add8", &ExampleMandA::add8)
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.def("add9", &ExampleMandA::add9)
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.def("add10", &ExampleMandA::add10)
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.def("self1", &ExampleMandA::self1)
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.def("self2", &ExampleMandA::self2)
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.def("self3", &ExampleMandA::self3)
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.def("self4", &ExampleMandA::self4)
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.def("self5", &ExampleMandA::self5)
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.def("internal1", &ExampleMandA::internal1)
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.def("internal2", &ExampleMandA::internal2)
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.def("internal3", &ExampleMandA::internal3)
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.def("internal4", &ExampleMandA::internal4)
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.def("internal5", &ExampleMandA::internal5)
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#if defined(PYBIND11_OVERLOAD_CAST)
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.def("overloaded", py::overload_cast<int, float>(&ExampleMandA::overloaded))
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.def("overloaded", py::overload_cast<float, int>(&ExampleMandA::overloaded))
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.def("overloaded", py::overload_cast<int, int>(&ExampleMandA::overloaded))
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.def("overloaded", py::overload_cast<float, float>(&ExampleMandA::overloaded))
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.def("overloaded_float", py::overload_cast<float, float>(&ExampleMandA::overloaded))
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.def("overloaded_const", py::overload_cast<int, float>(&ExampleMandA::overloaded, py::const_))
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.def("overloaded_const", py::overload_cast<float, int>(&ExampleMandA::overloaded, py::const_))
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.def("overloaded_const", py::overload_cast<int, int>(&ExampleMandA::overloaded, py::const_))
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.def("overloaded_const", py::overload_cast<float, float>(&ExampleMandA::overloaded, py::const_))
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#else
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.def("overloaded", static_cast<py::str (ExampleMandA::*)(int, float)>(&ExampleMandA::overloaded))
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.def("overloaded", static_cast<py::str (ExampleMandA::*)(float, int)>(&ExampleMandA::overloaded))
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.def("overloaded", static_cast<py::str (ExampleMandA::*)(int, int)>(&ExampleMandA::overloaded))
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.def("overloaded", static_cast<py::str (ExampleMandA::*)(float, float)>(&ExampleMandA::overloaded))
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.def("overloaded_float", static_cast<py::str (ExampleMandA::*)(float, float)>(&ExampleMandA::overloaded))
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.def("overloaded_const", static_cast<py::str (ExampleMandA::*)(int, float) const>(&ExampleMandA::overloaded))
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.def("overloaded_const", static_cast<py::str (ExampleMandA::*)(float, int) const>(&ExampleMandA::overloaded))
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.def("overloaded_const", static_cast<py::str (ExampleMandA::*)(int, int) const>(&ExampleMandA::overloaded))
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.def("overloaded_const", static_cast<py::str (ExampleMandA::*)(float, float) const>(&ExampleMandA::overloaded))
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#endif
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// Raise error if trying to mix static/non-static overloads on the same name:
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.def_static("add_mixed_overloads1", []() {
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auto emna = py::reinterpret_borrow<py::class_<ExampleMandA>>(py::module::import("pybind11_tests").attr("ExampleMandA"));
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emna.def ("overload_mixed1", static_cast<py::str (ExampleMandA::*)(int, int)>(&ExampleMandA::overloaded))
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.def_static("overload_mixed1", static_cast<py::str ( *)( )>(&ExampleMandA::overloaded));
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})
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.def_static("add_mixed_overloads2", []() {
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auto emna = py::reinterpret_borrow<py::class_<ExampleMandA>>(py::module::import("pybind11_tests").attr("ExampleMandA"));
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emna.def_static("overload_mixed2", static_cast<py::str ( *)( )>(&ExampleMandA::overloaded))
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.def ("overload_mixed2", static_cast<py::str (ExampleMandA::*)(int, int)>(&ExampleMandA::overloaded));
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})
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.def("__str__", &ExampleMandA::toString)
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.def_readwrite("value", &ExampleMandA::value);
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// Issue #443: can't call copied methods in Python 3
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emna.attr("add2b") = emna.attr("add2");
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py::class_<TestProperties>(m, "TestProperties")
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.def(py::init<>())
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.def_readonly("def_readonly", &TestProperties::value)
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.def_readwrite("def_readwrite", &TestProperties::value)
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.def_property_readonly("def_property_readonly", &TestProperties::get)
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.def_property("def_property", &TestProperties::get, &TestProperties::set)
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.def_readonly_static("def_readonly_static", &TestProperties::static_value)
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.def_readwrite_static("def_readwrite_static", &TestProperties::static_value)
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.def_property_readonly_static("def_property_readonly_static",
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[](py::object) { return TestProperties::static_get(); })
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.def_property_static("def_property_static",
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[](py::object) { return TestProperties::static_get(); },
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[](py::object, int v) { TestProperties::static_set(v); })
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.def_property_static("static_cls",
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[](py::object cls) { return cls; },
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[](py::object cls, py::function f) { f(cls); });
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py::class_<TestPropertiesOverride, TestProperties>(m, "TestPropertiesOverride")
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.def(py::init<>())
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.def_readonly("def_readonly", &TestPropertiesOverride::value)
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.def_readonly_static("def_readonly_static", &TestPropertiesOverride::static_value);
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py::class_<SimpleValue>(m, "SimpleValue")
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.def_readwrite("value", &SimpleValue::value);
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auto static_get1 = [](py::object) -> const SimpleValue & { return TestPropRVP::sv1; };
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auto static_get2 = [](py::object) -> const SimpleValue & { return TestPropRVP::sv2; };
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auto static_set1 = [](py::object, int v) { TestPropRVP::sv1.value = v; };
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auto static_set2 = [](py::object, int v) { TestPropRVP::sv2.value = v; };
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auto rvp_copy = py::return_value_policy::copy;
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py::class_<TestPropRVP>(m, "TestPropRVP")
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.def(py::init<>())
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.def_property_readonly("ro_ref", &TestPropRVP::get1)
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.def_property_readonly("ro_copy", &TestPropRVP::get2, rvp_copy)
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.def_property_readonly("ro_func", py::cpp_function(&TestPropRVP::get2, rvp_copy))
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.def_property("rw_ref", &TestPropRVP::get1, &TestPropRVP::set1)
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.def_property("rw_copy", &TestPropRVP::get2, &TestPropRVP::set2, rvp_copy)
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.def_property("rw_func", py::cpp_function(&TestPropRVP::get2, rvp_copy), &TestPropRVP::set2)
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.def_property_readonly_static("static_ro_ref", static_get1)
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.def_property_readonly_static("static_ro_copy", static_get2, rvp_copy)
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.def_property_readonly_static("static_ro_func", py::cpp_function(static_get2, rvp_copy))
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.def_property_static("static_rw_ref", static_get1, static_set1)
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.def_property_static("static_rw_copy", static_get2, static_set2, rvp_copy)
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.def_property_static("static_rw_func", py::cpp_function(static_get2, rvp_copy), static_set2)
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.def_property_readonly("rvalue", &TestPropRVP::get_rvalue)
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.def_property_readonly_static("static_rvalue", [](py::object) { return SimpleValue(); });
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struct MetaclassOverride { };
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py::class_<MetaclassOverride>(m, "MetaclassOverride", py::metaclass((PyObject *) &PyType_Type))
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.def_property_readonly_static("readonly", [](py::object) { return 1; });
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#if !defined(PYPY_VERSION)
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py::class_<DynamicClass>(m, "DynamicClass", py::dynamic_attr())
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.def(py::init());
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py::class_<CppDerivedDynamicClass, DynamicClass>(m, "CppDerivedDynamicClass")
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.def(py::init());
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#endif
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// Test converting. The ArgAlwaysConverts is just there to make the first no-conversion pass
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// fail so that our call always ends up happening via the second dispatch (the one that allows
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// some conversion).
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class ArgInspector {
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public:
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ArgInspector1 f(ArgInspector1 a, ArgAlwaysConverts) { return a; }
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std::string g(ArgInspector1 a, const ArgInspector1 &b, int c, ArgInspector2 *d, ArgAlwaysConverts) {
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return a.arg + "\n" + b.arg + "\n" + std::to_string(c) + "\n" + d->arg;
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}
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static ArgInspector2 h(ArgInspector2 a, ArgAlwaysConverts) { return a; }
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};
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py::class_<ArgInspector>(m, "ArgInspector")
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.def(py::init<>())
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.def("f", &ArgInspector::f, py::arg(), py::arg() = ArgAlwaysConverts())
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.def("g", &ArgInspector::g, "a"_a.noconvert(), "b"_a, "c"_a.noconvert()=13, "d"_a=ArgInspector2(), py::arg() = ArgAlwaysConverts())
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.def_static("h", &ArgInspector::h, py::arg().noconvert(), py::arg() = ArgAlwaysConverts())
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;
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m.def("arg_inspect_func", [](ArgInspector2 a, ArgInspector1 b, ArgAlwaysConverts) { return a.arg + "\n" + b.arg; },
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py::arg().noconvert(false), py::arg_v(nullptr, ArgInspector1()).noconvert(true), py::arg() = ArgAlwaysConverts());
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m.def("floats_preferred", [](double f) { return 0.5 * f; }, py::arg("f"));
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m.def("floats_only", [](double f) { return 0.5 * f; }, py::arg("f").noconvert());
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m.def("ints_preferred", [](int i) { return i / 2; }, py::arg("i"));
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m.def("ints_only", [](int i) { return i / 2; }, py::arg("i").noconvert());
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// Issue/PR #648: bad arg default debugging output
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#if !defined(NDEBUG)
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m.attr("debug_enabled") = true;
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#else
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m.attr("debug_enabled") = false;
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#endif
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m.def("bad_arg_def_named", []{
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auto m = py::module::import("pybind11_tests");
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m.def("should_fail", [](int, NotRegistered) {}, py::arg(), py::arg("a") = NotRegistered());
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});
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|
m.def("bad_arg_def_unnamed", []{
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|
auto m = py::module::import("pybind11_tests");
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m.def("should_fail", [](int, NotRegistered) {}, py::arg(), py::arg() = NotRegistered());
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|
});
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|
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|
py::class_<NoneTester, std::shared_ptr<NoneTester>>(m, "NoneTester")
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|
.def(py::init<>());
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|
m.def("no_none1", &none1, py::arg().none(false));
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|
m.def("no_none2", &none2, py::arg().none(false));
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|
m.def("no_none3", &none3, py::arg().none(false));
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|
m.def("no_none4", &none4, py::arg().none(false));
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|
m.def("no_none5", &none5, py::arg().none(false));
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|
m.def("ok_none1", &none1);
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|
m.def("ok_none2", &none2, py::arg().none(true));
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|
m.def("ok_none3", &none3);
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|
m.def("ok_none4", &none4, py::arg().none(true));
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|
m.def("ok_none5", &none5);
|
|
|
|
// Issue #283: __str__ called on uninitialized instance when constructor arguments invalid
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|
py::class_<StrIssue>(m, "StrIssue")
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|
.def(py::init<int>())
|
|
.def(py::init<>())
|
|
.def("__str__", [](const StrIssue &si) {
|
|
return "StrIssue[" + std::to_string(si.val) + "]"; }
|
|
);
|
|
|
|
// Issues #854/910: incompatible function args when member function/pointer is in unregistered
|
|
// base class The methods and member pointers below actually resolve to members/pointers in
|
|
// UnregisteredBase; before this test/fix they would be registered via lambda with a first
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|
// argument of an unregistered type, and thus uncallable.
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|
py::class_<RegisteredDerived>(m, "RegisteredDerived")
|
|
.def(py::init<>())
|
|
.def("do_nothing", &RegisteredDerived::do_nothing)
|
|
.def("increase_value", &RegisteredDerived::increase_value)
|
|
.def_readwrite("rw_value", &RegisteredDerived::rw_value)
|
|
.def_readonly("ro_value", &RegisteredDerived::ro_value)
|
|
// These should trigger a static_assert if uncommented
|
|
//.def_readwrite("fails", &SimpleValue::value) // should trigger a static_assert if uncommented
|
|
//.def_readonly("fails", &SimpleValue::value) // should trigger a static_assert if uncommented
|
|
.def_property("rw_value_prop", &RegisteredDerived::get_int, &RegisteredDerived::set_int)
|
|
.def_property_readonly("ro_value_prop", &RegisteredDerived::get_double)
|
|
// This one is in the registered class:
|
|
.def("sum", &RegisteredDerived::sum)
|
|
;
|
|
|
|
using Adapted = decltype(py::method_adaptor<RegisteredDerived>(&RegisteredDerived::do_nothing));
|
|
static_assert(std::is_same<Adapted, void (RegisteredDerived::*)() const>::value, "");
|
|
|
|
// test_custom_caster_destruction
|
|
// Test that `take_ownership` works on types with a custom type caster when given a pointer
|
|
|
|
// default policy: don't take ownership:
|
|
m.def("custom_caster_no_destroy", []() { static auto *dt = new DestructionTester(); return dt; });
|
|
|
|
m.def("custom_caster_destroy", []() { return new DestructionTester(); },
|
|
py::return_value_policy::take_ownership); // Takes ownership: destroy when finished
|
|
m.def("custom_caster_destroy_const", []() -> const DestructionTester * { return new DestructionTester(); },
|
|
py::return_value_policy::take_ownership); // Likewise (const doesn't inhibit destruction)
|
|
m.def("destruction_tester_cstats", &ConstructorStats::get<DestructionTester>, py::return_value_policy::reference);
|
|
});
|