24namespace seqan3::list_traits::detail
32template <ptrdiff_t idx,
typename ...pack_t>
39template <
typename ...pack_t>
46template <
typename ...pack_t>
54template <
typename ...pack1_t,
56type_list<pack1_t..., pack2_t...>
concat(type_list<pack1_t...>, type_list<pack2_t...>);
64template <
typename ...pack1_t,
66 typename ...more_lists_t>
67auto concat(type_list<pack1_t...>, type_list<pack2_t...>, more_lists_t ...)
69 return concat(type_list<pack1_t..., pack2_t...>{}, more_lists_t{}...);
76template <
typename ...pack_t>
84template <
template <
typename>
typename trait_t,
typename ...pack_t>
92template <ptrdiff_t idx,
102template <
typename replace_t,
108inline constexpr type_list<>
reverse(type_list<>) {
return {}; }
111template <
typename head_t,
typename ...pack_t>
112auto reverse(type_list<head_t, pack_t...>)
114 return concat(
reverse(type_list<pack_t...>{}), type_list<head_t>{});
118template <
typename ...current_list_t>
123template <
typename ...current_list_t,
typename remove_t,
typename ...remove_list_t>
127 if constexpr (pos >= 0)
131 using split_list1_t =
typename split_list_t::first_type;
132 using split_list2_t =
decltype(
drop_front(
typename split_list_t::second_type{}));
133 using filtered_list_t =
decltype(
concat(split_list1_t{}, split_list2_t{}));
134 return type_list_difference(filtered_list_t{},
seqan3::type_list<remove_t, remove_list_t...>{});
140 return type_list_difference(filtered_list_t{},
seqan3::type_list<remove_list_t...>{});
159template <
typename list_t>
160 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
161inline constexpr size_t size = 0;
170template <
typename ...pack_t>
174template <
typename query_t,
typename list_t>
175 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
176inline constexpr ptrdiff_t
count = -1;
185template <
typename query_t,
typename ...pack_t>
190template <
typename query_t,
typename list_t>
191 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
192inline constexpr ptrdiff_t find = -1;
201template <
typename query_t,
typename ...pack_t>
202inline constexpr ptrdiff_t find<query_t,
type_list<pack_t...>> =
203 seqan3::pack_traits::detail::find<query_t, pack_t...>();
206template <
template <
typename>
typename pred_t,
typename list_t>
207 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
208inline constexpr ptrdiff_t find_if = -1;
217template <
template <
typename>
typename pred_t,
typename ...pack_t>
218inline constexpr ptrdiff_t find_if<pred_t,
type_list<pack_t...>> =
219 seqan3::pack_traits::detail::find_if<pred_t, pack_t...>();
227template <
typename query_t,
typename list_t>
229 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
231inline constexpr bool contains = (find<query_t, list_t> != -1);
255template <ptrdiff_t
idx,
typename list_t>
257 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) &&
258 ((idx >= 0 && idx < size<list_t>) || (-idx <= size<list_t>))
260using at =
typename decltype(detail::at<idx>(list_t{}))::type;
275template <
typename list_t>
277 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (size<list_t> > 0)
279using front =
typename decltype(detail::front(list_t{}))::type;
297template <
typename list_t>
299 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (size<list_t> > 0)
301using back =
typename decltype(detail::back(list_t{}))::type;
325template <
typename ...lists_t>
327 requires (seqan3::detail::template_specialisation_of<lists_t, seqan3::type_list> && ...)
329using concat =
decltype(detail::concat(lists_t{}...));
344template <
typename list_t>
346 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (size<list_t> > 0)
364template <ptrdiff_t i,
typename list_t>
366 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
368using take =
typename decltype(detail::split_after<i>(list_t{}))::first_type;
384template <ptrdiff_t i,
typename list_t>
386 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
388using drop =
typename decltype(detail::split_after<i>(list_t{}))::second_type;
404template <ptrdiff_t i,
typename list_t>
406 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
424template <ptrdiff_t i,
typename list_t>
426 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
444template <ptrdiff_t i,
typename list_t>
446 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
467template <
template <
typename>
typename trait_t,
typename list_t>
469 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
471using transform =
decltype(detail::transform<trait_t>(list_t{}));
488template <
typename replace_t, std::ptrdiff_t i,
typename list_t>
490 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i < size<list_t>)
492using replace_at =
decltype(detail::replace_at<replace_t, i>(list_t{}));
decltype(detail::split_after< i >(list_t{})) split_after
Split a seqan3::type_list into two parts returned as a pair of seqan3::type_list.
Definition: traits.hpp:448
typename decltype(detail::split_after< i >(list_t{}))::first_type take
Return a seqan3::type_list of the first n types in the input type list.
Definition: traits.hpp:368
decltype(detail::concat(lists_t{}...)) concat
Join two seqan3::type_list s into one.
Definition: traits.hpp:329
constexpr bool contains
Whether a type occurs in a type list or not.
Definition: traits.hpp:231
drop< size< list_t > - i, list_t > take_last
Return a seqan3::type_list of the last n types in the input type list.
Definition: traits.hpp:408
typename decltype(detail::front(list_t{}))::type front
Return the first type from the type list.
Definition: traits.hpp:279
take< size< list_t > - i, list_t > drop_last
Return a seqan3::type_list of the types the input type list, except the last n.
Definition: traits.hpp:428
decltype(detail::replace_at< replace_t, i >(list_t{})) replace_at
Replace the type at the given index with the given type.
Definition: traits.hpp:492
typename decltype(detail::split_after< i >(list_t{}))::second_type drop
Return a seqan3::type_list of the types in the input type list, except the first n.
Definition: traits.hpp:388
typename decltype(detail::at< idx >(list_t{}))::type at
Return the type at given index from the type list.
Definition: traits.hpp:260
decltype(detail::transform< trait_t >(list_t{})) transform
Apply a transformation trait to every type in the list and return a seqan3::type_list of the results.
Definition: traits.hpp:471
typename decltype(detail::back(list_t{}))::type back
Return the last type from the type list.
Definition: traits.hpp:301
decltype(detail::drop_front(list_t{})) drop_front
Return a seqan3::type_list of all the types in the type list, except the first.
Definition: traits.hpp:348
decltype(detail::replace_at< replace_t, i, pack_t... >(std::make_index_sequence< size< pack_t... > >{})) replace_at
Replace the type at the given index with the given type.
Definition: traits.hpp:470
typename decltype(detail::drop_front< pack_t... >())::type drop_front
Return a seqan3::type_list of all the types in the type pack, except the first.
Definition: traits.hpp:322
typename decltype((std::type_identity< pack_t >{},...))::type back
Return the last type from the type pack.
Definition: traits.hpp:297
constexpr ptrdiff_t find
Get the index of the first occurrence of a type in a pack.
Definition: traits.hpp:187
constexpr ptrdiff_t count
Count the occurrences of a type in a pack.
Definition: traits.hpp:169
typename decltype(detail::at< idx, pack_t... >())::type at
Return the type at given index from the type pack.
Definition: traits.hpp:256
decltype(detail::split_after< i, pack_t... >(type_list<>{})) split_after
Split a type pack into two parts returned as a pair of seqan3::type_list.
Definition: traits.hpp:448
typename decltype(detail::front< pack_t... >())::type front
Return the first type from the type pack.
Definition: traits.hpp:275
constexpr size_t size
The size of a type pack.
Definition: traits.hpp:151
seqan3::type_list< trait_t< pack_t >... > transform
Apply a transformation trait to every type in the pack and return a seqan3::type_list of the results.
Definition: traits.hpp:342
Namespace containing traits for working on seqan3::type_list.
Type that contains multiple types.
Definition: type_list.hpp:29
Provides seqan3::type_list.
Provides various traits for template packs.
The <type_traits> header from C++20's standard library.