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| template<typename I , typename S , typename O , typename F , typename P  = identity> requires input_iterator<I> && sentinel_for<S, I> && weakly_incrementable<O> && indirect_unary_predicate<F, projected<I, P>> && indirectly_copyable<I, O>
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| constexpr copy_if_result< I, O > | ranges::copy_if (I first, S last, O out, F pred, P proj=P{}) | 
|  | function template copy_if
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| template<typename Rng , typename O , typename F , typename P  = identity> requires input_range<Rng> && weakly_incrementable<O> && indirect_unary_predicate<F, projected<iterator_t<Rng>, P>> && indirectly_copyable<iterator_t<Rng>, O>
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| constexpr copy_if_result< borrowed_iterator_t< Rng >, O > | ranges::copy_if (Rng &&rng, O out, F pred, P proj=P{}) | 
|  | This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. 
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