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Folding convert_type into lvalue_ref and rvalue_ref paths. Some smart_holder_type_caster_load cleanup.

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This commit is contained in:
Ralf W. Grosse-Kunstleve 2021-01-23 14:10:11 -08:00
parent e7325dfc26
commit 631a288d69
1 changed files with 33 additions and 19 deletions
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52
include/pybind11/detail/classh_type_casters.h
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@ -227,36 +227,41 @@ struct smart_holder_type_caster_load {
load_impl = modified_type_caster_generic_load_impl(typeid(T));
if (!load_impl.load(src, convert))
return false;
loaded_smhldr_ptr = &load_impl.loaded_v_h.holder<holder_type>();
return true;
}
T *convert_type(void *void_ptr) {
if (void_ptr != nullptr && load_impl.loaded_v_h_cpptype != nullptr
&& !load_impl.reinterpret_cast_deemed_ok && load_impl.implicit_cast != nullptr) {
void_ptr = load_impl.implicit_cast(void_ptr);
}
return static_cast<T *>(void_ptr);
T *loaded_as_raw_ptr_unowned() const {
return convert_type(holder().template as_raw_ptr_unowned<void>());
}
T *loaded_as_raw_ptr_unowned() {
return convert_type(loaded_smhldr_ptr->as_raw_ptr_unowned<void>());
T &loaded_as_lvalue_ref() const {
static const char *context = "loaded_as_lvalue_ref";
holder().ensure_is_populated(context);
holder().ensure_has_pointee(context);
return *loaded_as_raw_ptr_unowned();
}
T &&loaded_as_rvalue_ref() const {
static const char *context = "loaded_as_rvalue_ref";
holder().ensure_is_populated(context);
holder().ensure_has_pointee(context);
return std::move(*loaded_as_raw_ptr_unowned());
}
std::shared_ptr<T> loaded_as_shared_ptr() {
std::shared_ptr<void> void_ptr = loaded_smhldr_ptr->as_shared_ptr<void>();
std::shared_ptr<void> void_ptr = holder().template as_shared_ptr<void>();
return std::shared_ptr<T>(void_ptr, convert_type(void_ptr.get()));
}
std::unique_ptr<T> loaded_as_unique_ptr() {
loaded_smhldr_ptr->ensure_can_release_ownership();
auto raw_void_ptr = loaded_smhldr_ptr->as_raw_ptr_unowned<void>();
holder().ensure_can_release_ownership();
auto raw_void_ptr = holder().template as_raw_ptr_unowned<void>();
// MISSING: Safety checks for type conversions
// (T must be polymorphic or meet certain other conditions).
T *raw_type_ptr = convert_type(raw_void_ptr);
// Critical transfer-of-ownership section. This must stay together.
loaded_smhldr_ptr->release_ownership();
holder().release_ownership();
auto result = std::unique_ptr<T>(raw_type_ptr);
void *value_void_ptr
@ -269,9 +274,18 @@ struct smart_holder_type_caster_load {
return result;
}
protected:
private:
modified_type_caster_generic_load_impl load_impl;
holder_type *loaded_smhldr_ptr = nullptr;
holder_type &holder() const { return load_impl.loaded_v_h.holder<holder_type>(); }
T *convert_type(void *void_ptr) const {
if (void_ptr != nullptr && load_impl.loaded_v_h_cpptype != nullptr
&& !load_impl.reinterpret_cast_deemed_ok && load_impl.implicit_cast != nullptr) {
void_ptr = load_impl.implicit_cast(void_ptr);
}
return static_cast<T *>(void_ptr);
}
};
// type_caster_base BEGIN
@ -361,10 +375,10 @@ struct classh_type_caster : smart_holder_type_caster_load<T> {
// clang-format off
operator T() { return this->loaded_smhldr_ptr->template as_lvalue_ref<T>(); }
operator T&&() && { return this->loaded_smhldr_ptr->template as_rvalue_ref<T>(); }
operator T const&() { return this->loaded_smhldr_ptr->template as_lvalue_ref<T>(); }
operator T&() { return this->loaded_smhldr_ptr->template as_lvalue_ref<T>(); }
operator T() { return this->loaded_as_lvalue_ref(); }
operator T&&() && { return this->loaded_as_rvalue_ref(); }
operator T const&() { return this->loaded_as_lvalue_ref(); }
operator T&() { return this->loaded_as_lvalue_ref(); }
operator T const*() { return this->loaded_as_raw_ptr_unowned(); }
operator T*() { return this->loaded_as_raw_ptr_unowned(); }