std::ranges::adjacent_transform_view<V,F,N>::begin
From cppreference.com
< cpp | ranges | adjacent transform view
C++
Ranges library
|
||||||||||||||||||||||
| Range primitives | |||||||
|
|||||||
| Range concepts | |||||||||||||||||||
|
|||||||||||||||||||
| Range factories | |||||||||
|
|||||||||
| Range adaptors | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||
| Helper items | |||||||||||||||||
|
|||||||||||||||||
std::ranges::adjacent_transform_view
| Member functions | ||||
adjacent_transform_view::begin | ||||
| Iterator | ||||
| Member functions | ||||
| Non-member functions | ||||
| Sentinel | ||||
| Member functions | ||||
| Non-member functions | ||||
constexpr auto begin(); |
(1) | (since C++23) |
|
constexpr
auto begin(
)
const
requires ranges::range
<
const InnerView>
&&
|
(2) | (since C++23) |
Returns an iterator to the first element of the adjacent_transform_view
Let inner_ be the underlying ranges::adjacent_view.
1) Equivalent to
return
/*iterator*/
<
false
>
(
*this, inner_.begin
(
)
)
;
2) Equivalent to
return
/*iterator*/
<
true
>
(
*this, inner_.begin
(
)
)
;
Parameters
(none)
Return value
Iterator to the first element.
Example
Run this code
#include <ranges> int main() { auto sum = [](auto... args) { return (... + args); }; constexpr auto view = std::views::iota(13, 1337) | std::views::adjacent_transform<3>(sum); static_assert(*view.begin() == 42 and 42 == 13 + 14 + 15); }
See also
| returns an iterator or a sentinel to the end (public member function) |
|
|
(C++20)
|
returns an iterator to the beginning of a range (customization point object) |