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std::ranges..._view::begin(3) C++ Standard Libarystd::ranges..._view::begin(3) NAME std::ranges::adjacent_transform_view::begin - std::ranges::adja- cent_transform_view::begin Synopsis constexpr auto begin(); (1) (since C++23) constexpr auto begin() const requires ranges::range<const InnerView> && (2) (since C++23) std::regular_invocable<const F&, __REPEAT(ranges::range_reference_t<const V>, N)...>; Returns an iterator to the first element of the adjacent_trans- form_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());. Parameters (none) Return value Iterator to the first element. Example // Run this code #include <ranges> 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); } See also end returns an iterator or a sentinel to the end (C++23) (public member function) ranges::begin returns an iterator to the beginning of a range (C++20) (customization point object) http://cppreference.com 2024.06.10 std::ranges..._view::begin(3)
NAME | Synopsis | Parameters | Return value | Example | See also
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