24namespace seqan3::list_traits::detail
32template <ptrdiff_t idx,
typename... pack_t>
39template <
typename... pack_t>
46template <
typename... pack_t>
54template <
typename... pack1_t,
typename... pack2_t>
55type_list<pack1_t..., pack2_t...>
concat(type_list<pack1_t...>, type_list<pack2_t...>);
63template <
typename... pack1_t,
typename... pack2_t,
typename... more_lists_t>
64auto concat(type_list<pack1_t...>, type_list<pack2_t...>, more_lists_t...)
66 return concat(type_list<pack1_t..., pack2_t...>{}, more_lists_t{}...);
73template <
typename... pack_t>
81template <
template <
typename>
typename trait_t,
typename... pack_t>
89template <ptrdiff_t idx,
typename... pack1_t>
97template <
size_t count,
typename t>
100 if constexpr (
count == 0)
101 return type_list<>{};
102 else if constexpr (
count == 1)
103 return type_list<t>{};
104 else if constexpr (
count == 2)
105 return type_list<t, t>{};
106 else if constexpr (
count == 3)
107 return type_list<t, t, t>{};
108 else if constexpr (
count == 4)
109 return type_list<t, t, t, t>{};
110 else if constexpr (
count == 5)
111 return type_list<t, t, t, t, t>{};
113 return concat(repeat<5, t>(), repeat<count - 5, t>());
122template <
typename replace_t, ptrdiff_t idx,
typename... pack_t>
126inline constexpr type_list<>
reverse(type_list<>)
132template <
typename head_t,
typename... pack_t>
133auto reverse(type_list<head_t, pack_t...>)
135 return concat(
reverse(type_list<pack_t...>{}), type_list<head_t>{});
139template <
typename... current_list_t>
147template <
typename... current_list_t,
typename remove_t,
typename... remove_list_t>
151 if constexpr (pos >= 0)
155 using split_list1_t =
typename split_list_t::first_type;
156 using split_list2_t =
decltype(
drop_front(
typename split_list_t::second_type{}));
157 using filtered_list_t =
decltype(
concat(split_list1_t{}, split_list2_t{}));
158 return type_list_difference(filtered_list_t{},
seqan3::type_list<remove_t, remove_list_t...>{});
164 return type_list_difference(filtered_list_t{},
seqan3::type_list<remove_list_t...>{});
183template <
typename list_t>
184 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
185inline constexpr size_t size = 0;
194template <
typename... pack_t>
198template <
typename query_t,
typename list_t>
199 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
200inline constexpr ptrdiff_t
count = -1;
209template <
typename query_t,
typename... pack_t>
213template <
typename query_t,
typename list_t>
214 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
215inline constexpr ptrdiff_t find = -1;
224template <
typename query_t,
typename... pack_t>
225inline constexpr ptrdiff_t find<query_t,
type_list<pack_t...>> =
226 seqan3::pack_traits::detail::find<query_t, pack_t...>();
229template <
template <
typename>
typename pred_t,
typename list_t>
230 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
231inline constexpr ptrdiff_t find_if = -1;
240template <
template <
typename>
typename pred_t,
typename... pack_t>
241inline constexpr ptrdiff_t find_if<pred_t,
type_list<pack_t...>> =
242 seqan3::pack_traits::detail::find_if<pred_t, pack_t...>();
250template <
typename query_t,
typename list_t>
251 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
252inline constexpr bool contains = (find<query_t, list_t> != -1);
276template <ptrdiff_t
idx,
typename list_t>
277 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>)
278 && ((idx >= 0 && idx < size<list_t>) || (-idx <= size<list_t>))
279using at =
typename decltype(detail::at<idx>(list_t{}))::type;
294template <
typename list_t>
295 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (size<list_t> > 0)
296using front =
typename decltype(detail::front(list_t{}))::type;
314template <
typename list_t>
315 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (size<list_t> > 0)
316using back =
typename decltype(detail::back(list_t{}))::type;
340template <
typename... lists_t>
341 requires (seqan3::detail::template_specialisation_of<lists_t, seqan3::type_list> && ...)
342using concat =
decltype(detail::concat(lists_t{}...));
357template <
typename list_t>
358 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (size<list_t> > 0)
375template <ptrdiff_t i,
typename list_t>
376 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
377using take =
typename decltype(detail::split_after<i>(list_t{}))::first_type;
393template <ptrdiff_t i,
typename list_t>
394 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
395using drop =
typename decltype(detail::split_after<i>(list_t{}))::second_type;
411template <ptrdiff_t i,
typename list_t>
412 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
429template <ptrdiff_t i,
typename list_t>
430 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
447template <ptrdiff_t i,
typename list_t>
448 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i <= size<list_t>)
468template <
template <
typename>
typename trait_t,
typename list_t>
469 requires seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>
470using transform =
decltype(detail::transform<trait_t>(list_t{}));
487template <
typename replace_t, std::ptrdiff_t i,
typename list_t>
488 requires (seqan3::detail::template_specialisation_of<list_t, seqan3::type_list>) && (i >= 0 && i < size<list_t>)
489using replace_at =
decltype(detail::replace_at<replace_t, i>(list_t{}));
503template <
size_t count,
typename t>
504using repeat =
decltype(detail::repeat<count, 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:449
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:377
decltype(detail::concat(lists_t{}...)) concat
Join two seqan3::type_list s into one.
Definition: traits.hpp:342
constexpr bool contains
Whether a type occurs in a type list or not.
Definition: traits.hpp:252
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:413
typename decltype(detail::front(list_t{}))::type front
Return the first type from the type list.
Definition: traits.hpp:296
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:431
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:489
decltype(detail::repeat< count, t >()) repeat
Create a type list with the given type repeated count times..
Definition: traits.hpp:504
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:395
typename decltype(detail::at< idx >(list_t{}))::type at
Return the type at given index from the type list.
Definition: traits.hpp:279
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:470
typename decltype(detail::back(list_t{}))::type back
Return the last type from the type list.
Definition: traits.hpp:316
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:359
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:443
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:308
typename decltype((std::type_identity< pack_t >{},...))::type back
Return the last type from the type pack.
Definition: traits.hpp:285
constexpr ptrdiff_t find
Get the index of the first occurrence of a type in a pack.
Definition: traits.hpp:182
constexpr ptrdiff_t count
Count the occurrences of a type in a pack.
Definition: traits.hpp:164
typename decltype(detail::at< idx, pack_t... >())::type at
Return the type at given index from the type pack.
Definition: traits.hpp:248
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:424
typename decltype(detail::front< pack_t... >())::type front
Return the first type from the type pack.
Definition: traits.hpp:265
constexpr size_t size
The size of a type pack.
Definition: traits.hpp:146
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:328
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.