std::ranges::concat_view<Views...>:: end
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concat_view::end
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| Deduction guides | ||||
| Iterator | ||||
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| Non-member functions | ||||
|
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) |