mirror of
https://github.com/pybind/pybind11.git
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7f94f24d64
* feat: allow annotate methods with `pos_only` when only have the `self` argument * chore(typing): make arguments for auto-generated dunder methods positional-only * docs: add more comments to improve readability * style: fix nit suggestions * Add test_self_only_pos_only() in tests/test_methods_and_attributes * test: add docstring tests for generated dunder methods * test: remove failed tests * fix(test): run `gc.collect()` three times for refcount tests --------- Co-authored-by: Ralf W. Grosse-Kunstleve <rgrossekunst@nvidia.com>
493 lines
22 KiB
C++
493 lines
22 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 "constructor_stats.h"
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#include "pybind11_tests.h"
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#if !defined(PYBIND11_OVERLOAD_CAST)
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template <typename... Args>
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using overload_cast_ = pybind11::detail::overload_cast_impl<Args...>;
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#endif
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class ExampleMandA {
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public:
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ExampleMandA() { print_default_created(this); }
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explicit 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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explicit ExampleMandA(std::string &&) {}
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ExampleMandA(ExampleMandA &&e) noexcept : value(e.value) { print_move_created(this); }
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~ExampleMandA() { print_destroyed(this); }
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std::string toString() const { return "ExampleMandA[value=" + std::to_string(value) + "]"; }
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void operator=(const ExampleMandA &e) {
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print_copy_assigned(this);
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value = e.value;
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}
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void operator=(ExampleMandA &&e) noexcept {
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print_move_assigned(this);
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value = e.value;
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}
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// NOLINTNEXTLINE(performance-unnecessary-value-param)
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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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// NOLINTNEXTLINE(readability-non-const-parameter) Deliberately non-const for testing
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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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void consume_str(std::string &&) {}
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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() const { return *this; } // return by const reference
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ExampleMandA *self4() { return this; } // return by pointer
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const ExampleMandA *self5() const { return this; } // return by const pointer
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int internal1() const { return value; } // return by value
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int &internal2() { return value; } // return by reference
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const int &internal3() const { 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() { return "()"; }
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py::str overloaded(int) { return "(int)"; }
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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) const { return "(int) const"; }
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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(float) { return "static float"; }
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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 TestPropRVP {
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UserType v1{1};
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UserType v2{1};
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static UserType sv1;
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static UserType sv2;
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const UserType &get1() const { return v1; }
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const UserType &get2() const { return v2; }
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UserType get_rvalue() const { return v2; }
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void set1(int v) { v1.set(v); }
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void set2(int v) { v2.set(v); }
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};
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UserType TestPropRVP::sv1(1);
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UserType TestPropRVP::sv2(1);
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// Test None-allowed py::arg argument policy
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class NoneTester {
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public:
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int answer = 42;
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};
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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(const std::shared_ptr<NoneTester> &obj) { return obj ? obj->answer : -1; }
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// Issue #2778: implicit casting from None to object (not pointer)
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class NoneCastTester {
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public:
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int answer = -1;
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NoneCastTester() = default;
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explicit NoneCastTester(int v) : answer(v) {}
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};
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struct StrIssue {
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int val = -1;
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StrIssue() = default;
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explicit 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
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// 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() {
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rw_value++;
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ro_value += 0.25;
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}
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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 explicit lvalue ref-qualification
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struct RefQualified {
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int value = 0;
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void refQualified(int other) & { value += other; }
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int constRefQualified(int other) const & { return value + other; }
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};
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// Test rvalue ref param
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struct RValueRefParam {
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std::size_t func1(std::string &&s) { return s.size(); }
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std::size_t func2(std::string &&s) const { return s.size(); }
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std::size_t func3(std::string &&s) & { return s.size(); }
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std::size_t func4(std::string &&s) const & { return s.size(); }
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};
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namespace pybind11_tests {
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namespace exercise_is_setter {
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struct FieldBase {
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int int_value() const { return int_value_; }
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FieldBase &SetIntValue(int int_value) {
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int_value_ = int_value;
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return *this;
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}
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private:
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int int_value_ = -99;
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};
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struct Field : FieldBase {};
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void add_bindings(py::module &m) {
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py::module sm = m.def_submodule("exercise_is_setter");
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// NOTE: FieldBase is not wrapped, therefore ...
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py::class_<Field>(sm, "Field")
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.def(py::init<>())
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.def_property(
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"int_value",
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&Field::int_value,
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&Field::SetIntValue // ... the `FieldBase &` return value here cannot be converted.
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);
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}
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} // namespace exercise_is_setter
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} // namespace pybind11_tests
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TEST_SUBMODULE(methods_and_attributes, m) {
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// test_methods_and_attributes
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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<std::string &&>())
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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("consume_str", &ExampleMandA::consume_str)
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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<>(&ExampleMandA::overloaded))
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.def("overloaded", py::overload_cast<int>(&ExampleMandA::overloaded))
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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>(&ExampleMandA::overloaded, py::const_))
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.def("overloaded_const",
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py::overload_cast<int, float>(&ExampleMandA::overloaded, py::const_))
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.def("overloaded_const",
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py::overload_cast<float, int>(&ExampleMandA::overloaded, py::const_))
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.def("overloaded_const",
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py::overload_cast<int, int>(&ExampleMandA::overloaded, py::const_))
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.def("overloaded_const",
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py::overload_cast<float, float>(&ExampleMandA::overloaded, py::const_))
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#else
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// Use both the traditional static_cast method and the C++11 compatible overload_cast_
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.def("overloaded", overload_cast_<>()(&ExampleMandA::overloaded))
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.def("overloaded", overload_cast_<int>()(&ExampleMandA::overloaded))
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.def("overloaded", overload_cast_<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", overload_cast_<float, float>()(&ExampleMandA::overloaded))
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.def("overloaded_const", overload_cast_<int >()(&ExampleMandA::overloaded, py::const_))
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.def("overloaded_const", overload_cast_<int, float>()(&ExampleMandA::overloaded, py::const_))
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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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// test_no_mixed_overloads
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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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[]() {
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auto emna = py::reinterpret_borrow<py::class_<ExampleMandA>>(
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py::module_::import("pybind11_tests.methods_and_attributes")
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.attr("ExampleMandA"));
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emna.def("overload_mixed1",
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static_cast<py::str (ExampleMandA::*)(int, int)>(
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&ExampleMandA::overloaded))
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.def_static(
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"overload_mixed1",
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static_cast<py::str (*)(float)>(&ExampleMandA::overloaded));
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})
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.def_static("add_mixed_overloads2",
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[]() {
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auto emna = py::reinterpret_borrow<py::class_<ExampleMandA>>(
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py::module_::import("pybind11_tests.methods_and_attributes")
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.attr("ExampleMandA"));
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emna.def_static("overload_mixed2",
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static_cast<py::str (*)(float)>(&ExampleMandA::overloaded))
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.def("overload_mixed2",
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static_cast<py::str (ExampleMandA::*)(int, int)>(
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&ExampleMandA::overloaded));
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})
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.def("__str__", &ExampleMandA::toString, py::pos_only())
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.def_readwrite("value", &ExampleMandA::value);
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// test_copy_method
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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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// test_properties, test_static_properties, test_static_cls
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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("def_writeonly", nullptr, [](TestProperties &s, int v) { s.value = v; })
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.def_property("def_property_writeonly", nullptr, &TestProperties::set)
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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_property("def_property_impossible", nullptr, nullptr)
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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_static("def_writeonly_static",
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nullptr,
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[](const py::object &, int v) { TestProperties::static_value = v; })
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.def_property_readonly_static(
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"def_property_readonly_static",
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[](const py::object &) { return TestProperties::static_get(); })
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.def_property_static(
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"def_property_writeonly_static",
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nullptr,
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[](const py::object &, int v) { return TestProperties::static_set(v); })
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.def_property_static(
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"def_property_static",
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[](const py::object &) { return TestProperties::static_get(); },
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[](const py::object &, int v) { TestProperties::static_set(v); })
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.def_property_static(
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"static_cls",
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[](py::object cls) { return cls; },
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[](const py::object &cls, const 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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auto static_get1 = [](const py::object &) -> const UserType & { return TestPropRVP::sv1; };
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auto static_get2 = [](const py::object &) -> const UserType & { return TestPropRVP::sv2; };
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auto static_set1 = [](const py::object &, int v) { TestPropRVP::sv1.set(v); };
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auto static_set2 = [](const py::object &, int v) { TestPropRVP::sv2.set(v); };
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auto rvp_copy = py::return_value_policy::copy;
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// test_property_return_value_policies
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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(
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"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(
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"static_rw_func", py::cpp_function(static_get2, rvp_copy), static_set2)
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// test_property_rvalue_policy
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.def_property_readonly("rvalue", &TestPropRVP::get_rvalue)
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.def_property_readonly_static("static_rvalue",
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[](const py::object &) { return UserType(1); });
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// test_metaclass_override
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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", [](const py::object &) { return 1; });
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// test_overload_ordering
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m.def("overload_order", [](const std::string &) { return 1; });
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m.def("overload_order", [](const std::string &) { return 2; });
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m.def("overload_order", [](int) { return 3; });
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m.def("overload_order", [](int) { return 4; }, py::prepend{});
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#if !defined(PYPY_VERSION)
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// test_dynamic_attributes
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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(const DynamicClass &) = delete;
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~DynamicClass() { print_destroyed(this); }
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};
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py::class_<DynamicClass>(m, "DynamicClass", py::dynamic_attr()).def(py::init());
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class CppDerivedDynamicClass : public DynamicClass {};
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py::class_<CppDerivedDynamicClass, DynamicClass>(m, "CppDerivedDynamicClass").def(py::init());
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#endif
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// test_bad_arg_default
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// Issue/PR #648: bad arg default debugging output
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#if defined(PYBIND11_DETAILED_ERROR_MESSAGES)
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m.attr("detailed_error_messages_enabled") = true;
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#else
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m.attr("detailed_error_messages_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(
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"should_fail",
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[](int, UnregisteredType) {},
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py::arg(),
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py::arg("a") = UnregisteredType());
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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(
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"should_fail",
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[](int, UnregisteredType) {},
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py::arg(),
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py::arg() = UnregisteredType());
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});
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// [workaround(intel)] ICC 20/21 breaks with py::arg().stuff, using py::arg{}.stuff works.
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// test_accepts_none
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py::class_<NoneTester, std::shared_ptr<NoneTester>>(m, "NoneTester").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);
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m.def("no_none_kwarg", &none2, "a"_a.none(false));
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m.def("no_none_kwarg_kw_only", &none2, py::kw_only(), "a"_a.none(false));
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// test_casts_none
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// Issue #2778: implicit casting from None to object (not pointer)
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py::class_<NoneCastTester>(m, "NoneCastTester")
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.def(py::init<>())
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.def(py::init<int>())
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.def(py::init([](py::none const &) { return NoneCastTester{}; }));
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py::implicitly_convertible<py::none, NoneCastTester>();
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m.def("ok_obj_or_none", [](NoneCastTester const &foo) { return foo.answer; });
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// test_str_issue
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// 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>())
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.def(py::init<>())
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.def("__str__",
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[](const StrIssue &si) { return "StrIssue[" + std::to_string(si.val) + "]"; });
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// test_unregistered_base_implementations
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//
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// Issues #854/910: incompatible function args when member function/pointer is in unregistered
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// base class The methods and member pointers below actually resolve to members/pointers in
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// 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")
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.def(py::init<>())
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.def("do_nothing", &RegisteredDerived::do_nothing)
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.def("increase_value", &RegisteredDerived::increase_value)
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.def_readwrite("rw_value", &RegisteredDerived::rw_value)
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.def_readonly("ro_value", &RegisteredDerived::ro_value)
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// Uncommenting the next line should trigger a static_assert:
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// .def_readwrite("fails", &UserType::value)
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// Uncommenting the next line should trigger a static_assert:
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// .def_readonly("fails", &UserType::value)
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.def_property("rw_value_prop", &RegisteredDerived::get_int, &RegisteredDerived::set_int)
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.def_property_readonly("ro_value_prop", &RegisteredDerived::get_double)
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|
// This one is in the registered class:
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|
.def("sum", &RegisteredDerived::sum);
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|
|
|
using Adapted
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|
= decltype(py::method_adaptor<RegisteredDerived>(&RegisteredDerived::do_nothing));
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|
static_assert(std::is_same<Adapted, void (RegisteredDerived::*)() const>::value, "");
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|
|
// test_methods_and_attributes
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py::class_<RefQualified>(m, "RefQualified")
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.def(py::init<>())
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|
.def_readonly("value", &RefQualified::value)
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|
.def("refQualified", &RefQualified::refQualified)
|
|
.def("constRefQualified", &RefQualified::constRefQualified);
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|
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py::class_<RValueRefParam>(m, "RValueRefParam")
|
|
.def(py::init<>())
|
|
.def("func1", &RValueRefParam::func1)
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|
.def("func2", &RValueRefParam::func2)
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|
.def("func3", &RValueRefParam::func3)
|
|
.def("func4", &RValueRefParam::func4);
|
|
|
|
pybind11_tests::exercise_is_setter::add_bindings(m);
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|
}
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