std::ranges::concat_view<Views...>::end
|
constexpr
auto end(
)
requires ( ! ( /*simple-view*/ <Views> && ...) ) ; |
(1) | (since C++26) |
|
constexpr
auto end(
)
const
requires (
ranges::range
<
const Views>
&& ...)
&&
|
(2) | (since C++26) |
Returns an iterator or std::default_sentinel that compares equal to the past-the-end iterator of the concat_view
constexpr auto N = sizeof...(Views);
if
constexpr
(
ranges::common_range
<Views...[N -
1
]
>
)
return
iterator
<
false
>
(this, std::in_place_index
<N -
1
>
ranges::end
(std::
get
<N -
1
>
(
views_ )));
else
return std::default_sentinel;
constexpr auto N = sizeof...(Views);
if
constexpr
(
ranges::common_range
<
const Views...[N -
1
]
>
)
return
iterator
<
true
>
(this, std::in_place_index
<N -
1
>
ranges::end
(std::
get
<N -
1
>
(
views_ )));
else
return std::default_sentinel;
Return value
As described above.
Example
The preliminary version can be checked out on Compiler Explorer.
#include <concepts> #include <iterator> #include <ranges> int main() { static constexpr int p[]{37, 42, 69}; static constexpr auto q = {19937, 1729}; constexpr auto cat = std::ranges::views::concat(p, q); static_assert(not std::same_as<std::default_sentinel_t, decltype(cat.end())>); static_assert(cat.end()[-1] == 1729); }
See also
| returns an iterator to the beginning (public member function) |
|
|
(C++20)
|
returns a sentinel indicating the end of a range (customization point object) |