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Add AddTypeToTag

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sha512sum 2024-04-21 02:25:45 +00:00
parent 38f3d889f8
commit d790df6403
1 changed files with 16 additions and 1 deletions
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17
include/utempl/meta_info.hpp
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@ -25,6 +25,19 @@ private:
template <typename T, typename Tag = impl::Types>
inline constexpr std::size_t kTypeId = MetaInfo<T, Tag>::kTypeId;
template <
typename Tag,
typename T,
typename... Ts,
typename... TTs,
std::size_t Id = loopholes::Counter<Tag, T, Ts..., TTs...>(),
auto = loopholes::Injector<MetaInfoKey<Id, Tag>{}, TypeList<T>{}>{}
>
consteval std::size_t AddTypeToTag(TTs&&...) {
return Id;
};
template <std::size_t Id, typename Tag = impl::Types>
using GetMetaInfo = MetaInfo<typename decltype(Magic(loopholes::Getter<MetaInfoKey<Id, Tag>{}>{}))::Type>;
@ -60,7 +73,9 @@ consteval auto GetTypeListForTag() {
/*
static_assert(kTypeId<int> == 0);
static_assert(kTypeId<void> == 1);
static_assert(std::is_same_v<decltype(GetTypeListForTag()), TypeList<int, void>>);
static_assert(AddTypeToTag<impl::Types, void, int>() == 2);
static_assert(std::is_same_v<decltype(GetTypeListForTag()), TypeList<int, void, void>>);
*/