std::ranges::zip_view<Views...>::end
constexpr auto end() requires (!(/*simple-view*/<Views> && ...); | (1) | (since C++23) |
constexpr auto end() const requires (ranges::range<const Views> && ...); | (2) | (since C++23) |
template< class... Rs > concept /*zip-is-common*/ = (sizeof...(Rs) == 1 && (ranges::common_range<Rs> && ...)) || (!(ranges::bidirectional_range<Rs> && ...) && (ranges::common_range<Rs> && ...)) || ((ranges::random_access_range<Rs> && ...) && (ranges::sized_range<Rs> && ...)); | (3) | (exposition only*) |
Returns a sentinel or an iterator that compares equal to the end iterator of the std::zip_view
.
Let views_
denote the underlying tuple of views.
-
return /*sentinel*/<false>(/*tuple-transform*/(ranges::end, views_));
,
/*zip-is-common*/<Views...>
evaluates to false
. Otherwise, -
return begin() + std::iter_difference_t</*iterator*/<false>>(size());
,
(ranges::random_access_range<Views> && ...)
evaluates to true
. Otherwise, -
return /*iterator*/<false>(/*tuple-transform*/(ranges::end, views_));
.
-
return /*sentinel*/<true>(/*tuple-transform*/(ranges::end, views_));
,
/*zip-is-common*/<const Views...>
evaluates to false
. Otherwise, -
return begin() + std::iter_difference_t</*iterator*/<true>>(size());
,
ranges::random_access_range<const Views> && ...
evaluates to true
. Otherwise, -
return /*iterator*/<true>(/*tuple-transform*/(ranges::end, views_));
.
Parameters
(none)
Return value
An iterator or sentinel representing the end of the zip_view
, as described above.
Notes
ranges::range<const ranges::zip_view<Views...>>
is modeled if and only if for every type Vi
in Views...
, const Vi
models range
.
Example
See also
(C++23) | returns an iterator to the beginning (public member function) |
(C++20) | returns a sentinel indicating the end of a range (customization point object) |
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