std::ranges::take_view<V>::reserve_hint
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std::ranges::take_view
take_view::reserve_hint
(C++26)
Member functions
Non-member functions
constexpr auto reserve_hint()
(1)
(since C++26)
constexpr auto reserve_hint() const
(2)
(since C++26)
Let W be V for overload (1) or const V for overload (2). Equivalent to
if constexpr (ranges::approximately_sized_range<W>)
{
auto n = static_cast<ranges::range_difference_t <W>>(ranges::reserve_hint(base_ ));
return to-unsigned-like(ranges::min (n, count_ ));
}
return to-unsigned-like(count_ );
Contents
[edit] Return value
The approximate size of the resulting range.
[edit] Notes
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_ranges_reserve_hint |
202502L |
(C++26) | ranges::approximately_sized_range and reserve_hint (1,2)
|
[edit] Example
This section is incomplete
Reason: no example
Reason: no example
[edit] See also
returns the number of elements, provided only if the underlying (adapted) range satisfies
(public member function) [edit]
sized_range (public member function) [edit]