cppdraft_translate/cppdraft/range/enumerate/view.md

[range.enumerate.view]

25 Ranges library [ranges]

25.7 Range adaptors [range.adaptors]

25.7.24 Enumerate view [range.enumerate]

25.7.24.2 Class template enumerate_view [range.enumerate.view]

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namespace std::ranges {template<view V>requires range-with-movable-referencesclass enumerate_view : public view_interface<enumerate_view> { V base_ = V(); // exposition only// [range.enumerate.iterator], class template enumerate_view​::​iteratortemplateclass iterator; // exposition only// [range.enumerate.sentinel], class template enumerate_view​::​sentineltemplateclass sentinel; // exposition onlypublic:constexpr enumerate_view() requires default_initializable = default; constexpr explicit enumerate_view(V base); constexpr auto begin() requires (){ return iterator(ranges::begin(base_), 0); }constexpr auto begin() const requires range-with-movable-references{ return iterator(ranges::begin(base_), 0); }constexpr auto end() requires () {if constexpr (forward_range && common_range && sized_range)return iterator(ranges::end(base_), ranges::distance(base_)); elsereturn sentinel(ranges::end(base_)); }constexpr auto end() const requires range-with-movable-references {if constexpr (forward_range && common_range && sized_range)return iterator(ranges::end(base_), ranges::distance(base_)); elsereturn sentinel(ranges::end(base_)); }constexpr auto size() requires sized_range{ return ranges::size(base_); }constexpr auto size() const requires sized_range{ return ranges::size(base_); }constexpr auto reserve_hint() requires approximately_sized_range{ return ranges::reserve_hint(base_); }constexpr auto reserve_hint() const requires approximately_sized_range{ return ranges::reserve_hint(base_); }constexpr V base() const & requires copy_constructible { return base_; }constexpr V base() && { return std::move(base_); }}; template enumerate_view(R&&) -> enumerate_view<views::all_t>;}

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constexpr explicit enumerate_view(V base);

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Effects: Initializes base_ with std​::​move(base).