26 namespace seqan3::detail
44 template <std::ranges::input_range urng_t>
45 class view_persist :
public std::ranges::view_interface<view_persist<urng_t>>
55 view_persist() noexcept = default;
56 constexpr view_persist(view_persist const & rhs) noexcept = default;
57 constexpr view_persist(view_persist && rhs) noexcept = default;
58 constexpr view_persist & operator=(view_persist const & rhs) noexcept = default;
59 constexpr view_persist & operator=(view_persist && rhs) noexcept = default;
60 ~view_persist() noexcept = default;
65 view_persist(urng_t && _urange) : urange{
new urng_t{std::move(_urange)}}
87 return std::ranges::begin(*urange);
91 auto begin() const noexcept
94 return std::ranges::cbegin(*urange);
112 return std::ranges::end(*urange);
116 auto end() const noexcept
119 return std::ranges::cend(*urange);
126 template <
typename urng_t>
127 view_persist(urng_t &&) -> view_persist<std::remove_reference_t<urng_t>>;
137 class persist_fn :
public adaptor_base<persist_fn>
141 using base_t = adaptor_base<persist_fn>;
145 using base_t::base_t;
154 template <std::ranges::viewable_range urng_t>
155 static auto impl(urng_t && urange)
157 return std::views::all(std::forward<urng_t>(urange));
163 template <std::ranges::range urng_t>
164 static auto impl(urng_t && urange)
166 static_assert(!std::is_lvalue_reference_v<urng_t>,
"BUG: lvalue-reference in persist_fn::impl().");
167 return view_persist{std::move(urange)};
219 inline constexpr
auto persist = persist_fn{};
Provides seqan3::detail::adaptor_base and seqan3::detail::combined_adaptor.
The <concepts> header from C++20's standard library.
Provides various transformation traits used by the range module.
requires requires
The rank_type of the semi-alphabet; defined as the return type of seqan3::to_rank....
Definition: alphabet/concept.hpp:164
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.