25namespace seqan3::detail
43template <std::ranges::input_range urng_t>
44class view_persist :
public std::ranges::view_interface<view_persist<urng_t>>
54 view_persist() noexcept = default;
55 constexpr view_persist(view_persist const & rhs) noexcept = default;
56 constexpr view_persist(view_persist && rhs) noexcept = default;
57 constexpr view_persist & operator=(view_persist const & rhs) noexcept = default;
58 constexpr view_persist & operator=(view_persist && rhs) noexcept = default;
59 ~view_persist() noexcept = default;
64 view_persist(urng_t && _urange) : urange{
new urng_t{std::move(_urange)}}
90 auto begin() const noexcept
111 return std::ranges::end(*urange);
115 auto end() const noexcept
118 return std::ranges::cend(*urange);
125template <
typename urng_t>
126view_persist(urng_t &&) -> view_persist<std::remove_reference_t<urng_t>>;
136class persist_fn :
public adaptor_base<persist_fn>
140 using base_t = adaptor_base<persist_fn>;
144 using base_t::base_t;
153 template <std::ranges::viewable_range urng_t>
154 static auto impl(urng_t && urange)
156 return std::views::all(std::forward<urng_t>(urange));
162 template <std::ranges::range urng_t>
163 static auto impl(urng_t && urange)
165 static_assert(!std::is_lvalue_reference_v<urng_t>,
"BUG: lvalue-reference in persist_fn::impl().");
166 return view_persist{std::move(urange)};
218inline constexpr auto persist = persist_fn{};
Provides seqan3::detail::adaptor_base and seqan3::detail::combined_adaptor.
Provides various transformation traits used by the range module.
Specifies requirements of an input range type for which the const version of that type satisfies the ...
Provides various transformation traits for use on iterators.
The <ranges> header from C++20's standard library.
Additional non-standard concepts for ranges.