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deduction guides for std::ranges::join_view

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< cpp‎ | ranges‎ | join view
 
 
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(C++23)
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template<class R>
explicit join_view(R&&) -> join_view<views::all_t<R>>;
(since C++20)

The deduction guide is provided for std::ranges::join_view to allow deduction from range.

If R is a view, the deduced type is join_view<R>; otherwise, the deduced type is usually join_view<ranges::ref_view<R>>.

[edit] Example