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Workaround for compiler error on NVIDIA HPC SDK nvc++ 20.9-0 #2714

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Workaround for compiler error on NVIDIA HPC SDK nvc++ 20.9-0 #2714

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15 changes: 14 additions & 1 deletion include/pybind11/cast.h
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Original file line number Diff line number Diff line change
Expand Up @@ -2191,7 +2191,20 @@ unpacking_collector<policy> collect_arguments(Args &&...args) {
template <typename Derived>
template <return_value_policy policy, typename... Args>
object object_api<Derived>::operator()(Args &&...args) const {
return detail::collect_arguments<policy>(std::forward<Args>(args)...).call(derived().ptr());
if constexpr(all_of<is_positional<Args>...>::value)
// Collect only positional arguments for a Python function call
return simple_collector<policy>(std::forward<Args>(args)...).call(derived().ptr());
else {
// Following argument order rules for generalized unpacking according to PEP 448
static_assert(
constexpr_last<is_positional, Args...>() < constexpr_first<is_keyword_or_ds, Args...>()
&& constexpr_last<is_s_unpacking, Args...>() < constexpr_first<is_ds_unpacking, Args...>(),
"Invalid function call: positional args must precede keywords and ** unpacking; "
"* unpacking must precede ** unpacking"
);
// Collect all arguments, including keywords and unpacking (only instantiated when needed)
return unpacking_collector<policy>(std::forward<Args>(args)...).call(derived().ptr());
}
}

template <typename Derived>
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