24namespace seqan3::detail
29template <
typename list_t,
template <
typename ...>
typename output_t>
30struct variant_from_tags;
34template <
template <
typename...>
typename output_t,
typename ...ts>
35struct variant_from_tags<type_list<ts...>, output_t>
47template <std::output_iterator<
char> it_t>
48constexpr void write_eol(it_t & it,
bool const add_cr)
66template <
typename format_variant_type>
67void set_format(format_variant_type & format,
70 using valid_formats = detail::transfer_template_args_onto_t<format_variant_type, type_list>;
72 bool format_found =
false;
74 if (extension.
size() > 1)
76 extension = extension.
substr(1);
77 detail::for_each<valid_formats>([&] (
auto fmt)
79 using fm_type =
typename decltype(fmt)::type;
81 for (
auto const & ext : fm_type::file_extensions)
83 if (std::ranges::equal(ext, extension))
85 format.template emplace<fm_type>();
94 throw unhandled_extension_error(
"No valid format found for this extension.");
102template <
typename list_t>
103inline constexpr bool has_member_file_extensions =
false;
106template <
template <
typename ...>
typename list_t,
typename ...ts>
107 requires (
requires { ts::file_extensions; }, ...,
true)
108inline constexpr bool has_member_file_extensions<list_t<ts...>> =
true;
116template <
typename query_t>
117inline constexpr bool has_type_valid_formats =
false;
120template <
typename query_t>
121 requires requires {
typename query_t::valid_formats; }
122inline constexpr bool has_type_valid_formats<query_t> =
true;
145template <
typename formats_t>
148 static_assert(has_member_file_extensions<formats_t>,
149 "Expects that all formats have a static member file_extensions storing the extensions in a range");
152 detail::for_each<formats_t>([&extensions] (
auto t_identity)
154 using format_t =
typename decltype(t_identity)::type;
155 std::ranges::copy(format_t::file_extensions, std::cpp20::back_inserter(extensions));
The <algorithm> header from C++20's standard library.
The <filesystem> header from C++17's standard library.
Provides exceptions used in the I/O module.
The <iterator> header from C++20's standard library.
Provides type traits for working with templates.
Provides algorithms for meta programming, parameter packs and seqan3::type_list.