std::ranges::adjacent_view<V,N>:: reserve_hint
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adjacent_view::reserve_hint
(C++26)
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constexpr
auto
reserve_hint
(
)
requires ranges :: approximately_sized_range < V > |
(1) | (seit C++26) |
|
constexpr
auto
reserve_hint
(
)
const
requires ranges :: approximately_sized_range < const V > |
(2) | (seit C++26) |
Entspricht
using
DT
=
ranges::
range_difference_t
<
decltype
(
(
base_
)
)
>
;
using
CT
=
ranges::
common_type_t
<
DT,
std::
size_t
>
;
auto
sz
=
static_cast
<
CT
>
(
ranges
::
reserve_hint
(
base_
)
)
;
sz
-
=
std::
min
<
CT
>
(
sz, N
-
1
)
;
return
to-unsigned-like
(
sz
)
;
Inhaltsverzeichnis |
Rückgabewert
Die ungefähre Größe des resultierenden Bereichs.
Hinweise
| Feature-Test Makro | Wert | Std | Feature |
|---|---|---|---|
__cpp_lib_ranges_reserve_hint
|
202502L
|
(C++26) |
ranges::approximately_sized_range
und
reserve_hint
(1,2)
|
Beispiel
|
Dieser Abschnitt ist unvollständig
Grund: Kein Beispiel |
Siehe auch
gibt die Anzahl der Elemente zurück, bereitgestellt nur wenn der zugrundeliegende (adaptierte) Bereich
sized_range
erfüllt
(öffentliche Elementfunktion) |