tmp/tmpzh0ey1jt/{from.md → to.md}
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#### Class template `take_while_view` <a id="range.take.while.view">[[range.take.while.view]]</a>
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``` cpp
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namespace std::ranges {
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template<view V, class Pred>
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requires input_range<V> && is_object_v<Pred> &&
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indirect_unary_predicate<const Pred, iterator_t<V>>
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class take_while_view : public view_interface<take_while_view<V, Pred>> {
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// [range.take.while.sentinel], class template take_while_view::sentinel
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template<bool> class sentinel; // exposition only
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V base_ = V(); // exposition only
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semiregular-box<Pred> pred_; // exposition only
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public:
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take_while_view() = default;
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constexpr take_while_view(V base, Pred pred);
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constexpr V base() const& requires copy_constructible<V> { return base_; }
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constexpr V base() && { return std::move(base_); }
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constexpr const Pred& pred() const;
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constexpr auto begin() requires (!simple-view<V>)
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{ return ranges::begin(base_); }
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constexpr auto begin() const requires range<const V>
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{ return ranges::begin(base_); }
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constexpr auto end() requires (!simple-view<V>)
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{ return sentinel<false>(ranges::end(base_), addressof(*pred_)); }
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constexpr auto end() const requires range<const V>
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{ return sentinel<true>(ranges::end(base_), addressof(*pred_)); }
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};
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template<class R, class Pred>
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take_while_view(R&&, Pred) -> take_while_view<views::all_t<R>, Pred>;
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}
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```
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``` cpp
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constexpr take_while_view(V base, Pred pred);
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```
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*Effects:* Initializes *base\_* with `std::move(base)` and *pred\_* with
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`std::move(pred)`.
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``` cpp
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constexpr const Pred& pred() const;
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```
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*Effects:* Equivalent to: `return *`*`pred_`*`;`
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