P1684R5: Conversions and `to_mdspan` should provide untemplated overloads
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- Dominant language
- HTML
- Stars
- 29
- Forks
- 26
- PR merge metrics
- No merged PRs in 30d
Description
Currently the conversion to mdspan and the to_mdspan are templated with different template arguments
template<class OtherElementType, class OtherExtents,
class OtherLayoutType, class OtherAccessorType>
operator mdspan ();
template<class OtherAccessorType>
constexpr mdspan<element_type, extents_type, layout_type, OtherAccessorType>
to_mdspan(const OtherAccessorType& a = default_accessor<element_type>());
That prevents us from using CTAD for the common use case where one converts to a matching mdspan. We should provide untemplated overloads so that this works
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
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Research direction
No files, tests, or entry points are named in the issue. Start by reading the existing conversion and to_mdspan signatures shown in the report and the surrounding proposal context. Done means providing untemplated overloads that support CTAD for the common matching-mdspan conversion case.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100