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git merge smart_holder (pybind/pybind11#4900) #30072

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merged 4 commits into from
Oct 24, 2023
Merged

git merge smart_holder (pybind/pybind11#4900) #30072

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3414c56
Workaround NVCC parse failure in `cast_op` (#4893)
Flamefire Oct 21, 2023
bf88e29
Bug fix: Replace bare `static exception<T>` with `gil_safe_call_once_…
Oct 23, 2023
28ec485
Merge branch 'master' into sh_merge_master
Oct 23, 2023
34b8d90
Merge branch 'smart_holder' into pywrapcc_merge_sh
Oct 24, 2023
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8 changes: 5 additions & 3 deletions include/pybind11/cast.h
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Original file line number Diff line number Diff line change
Expand Up @@ -67,13 +67,15 @@ using make_caster = make_caster_for_intrinsic<intrinsic_t<type>>;
// Shortcut for calling a caster's `cast_op_type` cast operator for casting a type_caster to a T
template <typename T>
typename make_caster<T>::template cast_op_type<T> cast_op(make_caster<T> &caster) {
return caster.operator typename make_caster<T>::template cast_op_type<T>();
using result_t = typename make_caster<T>::template cast_op_type<T>; // See PR #4893
return caster.operator result_t();
}
template <typename T>
typename make_caster<T>::template cast_op_type<typename std::add_rvalue_reference<T>::type>
cast_op(make_caster<T> &&caster) {
return std::move(caster).operator typename make_caster<T>::
template cast_op_type<typename std::add_rvalue_reference<T>::type>();
using result_t = typename make_caster<T>::template cast_op_type<
typename std::add_rvalue_reference<T>::type>; // See PR #4893
return std::move(caster).operator result_t();
}

template <typename EnumType>
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20 changes: 6 additions & 14 deletions include/pybind11/pybind11.h
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
#include "detail/smart_holder_sfinae_hooks_only.h"
#include "attr.h"
#include "gil.h"
#include "gil_safe_call_once.h"
#include "options.h"
#include "typing.h"

Expand Down Expand Up @@ -2901,23 +2902,14 @@ class exception : public object {
};

PYBIND11_NAMESPACE_BEGIN(detail)
// Returns a reference to a function-local static exception object used in the simple
// register_exception approach below. (It would be simpler to have the static local variable
// directly in register_exception, but that makes clang <3.5 segfault - issue #1349).
template <typename CppException>
exception<CppException> &get_exception_object() {
static exception<CppException> ex;
return ex;
}

// Helper function for register_exception and register_local_exception
template <typename CppException>
exception<CppException> &
register_exception_impl(handle scope, const char *name, handle base, bool isLocal) {
auto &ex = detail::get_exception_object<CppException>();
if (!ex) {
ex = exception<CppException>(scope, name, base);
}
PYBIND11_CONSTINIT static gil_safe_call_once_and_store<exception<CppException>> exc_storage;
exc_storage.call_once_and_store_result(
[&]() { return exception<CppException>(scope, name, base); });

auto register_func
= isLocal ? &register_local_exception_translator : &register_exception_translator;
Expand All @@ -2929,10 +2921,10 @@ register_exception_impl(handle scope, const char *name, handle base, bool isLoca
try {
std::rethrow_exception(p);
} catch (const CppException &e) {
set_error(detail::get_exception_object<CppException>(), e.what());
set_error(exc_storage.get_stored(), e.what());
}
});
return ex;
return exc_storage.get_stored();
}

PYBIND11_NAMESPACE_END(detail)
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