49     struct view_interface  struct
53         constexpr Derived & derived() noexcept  in derived()
57         constexpr const Derived & derived() const noexcept  in derived()
65         constexpr auto empty() noexcept(  in empty()
73         constexpr auto empty() const noexcept(noexcept(  in empty()
87         operator bool() noexcept(noexcept(std::declval<D &>().empty()))  in operator bool()
94         constexpr explicit operator bool() const  in operator bool()
104         constexpr auto data() noexcept(noexcept(std::declval<D &>().begin()))  in data()
113         constexpr auto data() const  in data()
121         constexpr auto size() noexcept(  in size()
128         constexpr auto size() const noexcept(noexcept(  in size()
139         constexpr auto front() noexcept(noexcept(*std::declval<D &>().begin()))  in front()
145         constexpr auto front() const  in front()
158         back() noexcept(noexcept(*std::prev(std::declval<D &>().end())))  in back()
168         constexpr auto back() const  in back()
176         constexpr auto operator[](v1_dtl::range_difference_t<D> n) noexcept(  in operator []()
183         constexpr auto operator[](v1_dtl::range_difference_t<D> n) const  in operator []()
215     using view_interface = std::ranges::view_interface<D>;  typedef