std::ranges::adjacent_transform_view<V,F,N>::begin - cppreference.com (original) (raw)

Returns an iterator to the first element of the adjacent_transform_view.

Let inner_ be the underlying ranges::adjacent_view.

1. Equivalent to return /*iterator*/<false>(*this, inner_.begin());.

2. Equivalent to return /*iterator*/<true>(*this, inner_.begin());.

[edit] Parameters

(none)

[edit] Return value

Iterator to the first element.

[edit] Example

#include   int main() { auto sum = [](auto... args) { return (... + args); };   constexpr auto view = std::views::iota(13, 1337) | std::views::adjacent_transform<3>(sum);   static_assert(*view.begin() == 42 and 42 == 13 + 14 + 15); }

[edit] See also

| | returns an iterator or a sentinel to the end (public member function) [edit] | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | returns an iterator to the beginning of a range(customization point object)[edit] |