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Showing content from https://cplusplus.github.io/LWG/issue4280 below:

partial_load uses undefined identifier T

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Section: 29.10.8.7 [simd.loadstore] Status: New Submitter: Tim Song Opened: 2025-06-21 Last modified: 2025-06-21

Priority: Not Prioritized

View all issues with New status.

Discussion:

The Effects: element of std::simd::partial_load (after the latest rename) uses T but that is not defined anywhere. It should be V::value_type.

Proposed resolution:

This wording is relative to N5008.

1. Modify 29.10.8.7 [simd.loadstore] as indicated:

   
   template<class V = see below, ranges::contiguous_range R, class... Flags>
     requires ranges::sized_range<R>
     constexpr V partial_load(R&& r, flags<Flags...> f = {});
   […]
   template<class V = see below, contiguous_iterator I, sized_sentinel_for<I> S, class... Flags>
     constexpr V partial_load(I first, S last, const typename V::mask_type& mask,
                              flags<Flags...> f = {});
   

   -6- […]

   -7- Mandates: […] -8- Preconditions: […] -9- Effects: Initializes the Returns: A basic_simd object whosei^th element is initialized with mask[i] && i < ranges::size(r) ? static_cast<T>(ranges::data(r)[i]) : T() for all i in the range of [0, V::size()) , where T is V::value_type. -10- Remarks: The default argument for template parameter V is basic_simd<ranges::range_value_t<R>>.

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