deduction guides for std::ranges::take_view
Defined in header <ranges> |
||
|---|---|---|
template< class R > take_view( R&&, ranges::range_difference_t<R> ) -> take_view<views::all_t<R>>; |
(since C++20) |
The deduction guide is provided for std::ranges::take_view to allow deduction from range and number of elements.
If R is a view, the deduced type is ranges::take_view<R>; otherwise, the deduced type is usually ranges::take_view<ranges::ref_view<R>>.
Example
Defect Reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 3447 | C++20 | the template parameter R is constrained with range |
R is unconstrained(but range_difference_t requires range) |
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