std::ranges::join_view<V>::begin
From cppreference.com
| constexpr auto begin(); |
(1) | (since C++20) |
| constexpr auto begin() const requires ranges::input_range<const V> && |
(2) | (since C++20) |
Returns an iterator to the first element of the join_view. Given base_ is the underlying view,
1) Equivalent to
- return /*iterator*/<true>{*this, ranges::begin(base_)}; if /*simple-view*/<V> is satisfied and ranges::range_reference_t<V> is reference type. Otherwise,
- return /*iterator*/<false>{*this, ranges::begin(base_)};.
2) Equivalent to return /*iterator*/<true>{*this, ranges::begin(base_)};.
Parameters
(none)
Return value
Iterator to the first element.
Notes
When ranges::range_reference_t<V> is not a reference type, that is, deferencing an iterator of V returns a prvalue temporary, the join_view is only an input_range, in which case only single-pass iteration is supported, and repeated calls to begin() may not give meaningful results.
Example
| This section is incomplete Reason: no example |
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) |