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std::ranges..._view::begin(3) C++ Standard Libarystd::ranges..._view::begin(3) NAME std::ranges::take_while_view::begin - std::ranges::take_while_view::be- gin Synopsis constexpr auto begin() requires (!__SimpleView<V>); (1) (since C++20) constexpr auto begin() const requires ranges::range<const V> && (2) (since C++20) std::indirect_unary_predicate<const Pred, ranges::iterator_t<const V>>; Returns an iterator to the first element of the view. Effectively calls ranges::begin on the underlying view. Overload (1) does not participate in overload resolution if V is a simple view (that is, if V and const V are views with the same iterator and sentinel types). Parameters (none) Return value ranges::begin(base_), where base_ is the underlying view. Example This section is incomplete Reason: no example Defect reports The following behavior-changing defect reports were applied retroac- tively to previously published C++ standards. DR Applied to Behavior as published Correct behavior LWG 3450 C++20 the const overload might return an iterator constrained non-comparable to the sentinel See also end returns a sentinel representing the end (C++20) (public member function) operator== compares a sentinel with an iterator returned from take_while_view::begin (C++20) (function) http://cppreference.com 2022.07.31 std::ranges..._view::begin(3)
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