# std::ranges::zip_view<Views...>::end

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< cpp‎ | ranges‎ | zip view

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 an iterator or a sentinel that compares equal to the end iterator of the `zip_view`.

Let `views_` denote the underlying tuple of views.

1) Equivalent to:

- return /*sentinel*/<false>(/*tuple-transform*/( ranges::end, views_));,

  if /*zip-is-common*/<Views...> evaluates to false. Otherwise,

- return begin() + std::iter_difference_t </*iterator*/<false>>(size());,

  if ( ranges::random_access_range <Views> && ...) evaluates to true. Otherwise,

- return /*iterator*/<false>(/*tuple-transform*/( ranges::end, views_));.

2) Equivalent to:

- return /*sentinel*/<true>(/*tuple-transform*/( ranges::end, views_));,

  if /*zip-is-common*/<const Views...> evaluates to false. Otherwise,

- return begin() + std::iter_difference_t </*iterator*/<true>>(size());,

  if 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

| This section is incomplete Reason: no example

### See also

begin | returns an iterator to the beginning (public member function)
ranges::end (C++20) | returns a sentinel indicating the end of a range (customization point object)

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