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submdspan overloads using std::pair are marked as device-usable #461

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submdspan overloads using std::pair are marked as device-usable#461

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@masterleinad
masterleinad
opened on Jul 9, 2026

Cuda 13.3.0 + C++23 complains about submdspan overloads with std::pair arguments since the constructor has MDSPAN_INLINE_FUNCTION annotations, see

mdspan/include/experimental/__p2630_bits/submdspan.hpp

Lines 24 to 29 in cae4a4e

template <class ElementType, class Extents, class LayoutPolicy,
class AccessorPolicy, class... SliceSpecifiers>
MDSPAN_INLINE_FUNCTION
constexpr auto
submdspan(const mdspan<ElementType, Extents, LayoutPolicy, AccessorPolicy> &src,
SliceSpecifiers... slices) {
.
Also see kokkos/kokkos#9333.

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