cppdraft_translate/cppdraft/view/interface/members.md

[view.interface.members]

25 Ranges library [ranges]

25.5 Range utilities [range.utility]

25.5.3 View interface [view.interface]

25.5.3.2 Members [view.interface.members]

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constexpr decltype(auto) front() requires [forward_range](range.refinements#concept:forward_range "25.4.6 Other range refinements [range.refinements]")<D>; constexpr decltype(auto) front() const requires [forward_range](range.refinements#concept:forward_range "25.4.6 Other range refinements [range.refinements]")<const D>;

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Hardened preconditions: !empty() is true.

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Effects: Equivalent to: return *ranges​::​begin(derived());

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constexpr decltype(auto) back() requires [bidirectional_range](range.refinements#concept:bidirectional_range "25.4.6 Other range refinements [range.refinements]")<D> && [common_range](range.refinements#concept:common_range "25.4.6 Other range refinements [range.refinements]")<D>; constexpr decltype(auto) back() const requires [bidirectional_range](range.refinements#concept:bidirectional_range "25.4.6 Other range refinements [range.refinements]")<const D> && [common_range](range.refinements#concept:common_range "25.4.6 Other range refinements [range.refinements]")<const D>;

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Hardened preconditions: !empty() is true.

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Effects: Equivalent to: return *ranges​::​prev(ranges​::​end(derived()));