26 namespace seqan3::detail
31 template <
typename list_t,
template <
typename ...>
typename output_t>
32 struct variant_from_tags;
36 template <
template <
typename...>
typename output_t,
typename ...ts>
37 struct variant_from_tags<
type_list<ts...>, output_t>
49 template <std::output_iterator<
char> it_t>
50 constexpr
void write_eol(it_t & it,
bool const add_cr)
68 template <
typename format_variant_type>
69 void set_format(format_variant_type & format,
72 using valid_formats = detail::transfer_template_args_onto_t<format_variant_type, type_list>;
74 bool format_found =
false;
76 if (extension.
size() > 1)
78 extension = extension.
substr(1);
79 detail::for_each<valid_formats>([&] (
auto fmt)
81 using fm_type =
typename decltype(fmt)::type;
83 for (
auto const & ext : fm_type::file_extensions)
85 if (std::ranges::equal(ext, extension))
96 throw unhandled_extension_error(
"No valid format found for this extension.");
103 template <
typename list_t>
104 inline constexpr
bool has_member_file_extensions =
false;
107 template <
template <
typename ...>
typename list_t,
typename ...ts>
108 requires (requires { ts::file_extensions; }, ...,
true)
109 inline constexpr
bool has_member_file_extensions<list_t<ts...>> =
true;
116 template <
typename query_t>
117 inline constexpr
bool has_type_valid_formats =
false;
120 template <
typename query_t>
121 requires requires {
typename query_t::valid_formats; }
122 inline constexpr
bool has_type_valid_formats<query_t> =
true;
144 template <
typename formats_t>
147 static_assert(has_member_file_extensions<formats_t>,
148 "Expects that all formats have a static member file_extensions storing the extensions in a range");
151 detail::for_each<formats_t>([&extensions] (
auto t_identity)
153 using format_t =
typename decltype(t_identity)::type;
154 std::ranges::copy(format_t::file_extensions, std::ranges::back_inserter(extensions));