diff options
| -rw-r--r-- | lib/persistence.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/lib/persistence.h b/lib/persistence.h index 75f578e..3c95a00 100644 --- a/lib/persistence.h +++ b/lib/persistence.h @@ -331,6 +331,65 @@ namespace Persistence { } }; + template<typename... T> struct SelectionT<std::tuple<T...>> : public SelectionV<std::tuple<T...>> { + using V = std::tuple<T...>; + using SelectionV<V>::SelectionV; + + struct Members : public SelectionV<V> { + template<size_t... Idx> + explicit Members(V & v, std::integer_sequence<size_t, Idx...>) : + SelectionV<V> {v}, members {SelectionV<std::tuple_element_t<Idx, V>>::make(std::get<Idx>(v))...} + { + } + + void + beforeValue(Stack & stk) override + { + stk.push(std::move(members[idx++])); + } + + std::size_t idx {0}; + std::array<SelectionPtr, std::tuple_size_v<V>> members; + }; + + void + beginArray(Stack & stk) override + { + stk.push(this->template make_s<Members>( + this->v, std::make_integer_sequence<size_t, std::tuple_size_v<V>>())); + } + }; + + template<typename T, typename U> struct SelectionT<std::pair<T, U>> : public SelectionV<std::pair<T, U>> { + using V = std::pair<T, U>; + using SelectionV<V>::SelectionV; + + struct Members : public SelectionV<V> { + explicit Members(V & v) : + SelectionV<V> {v}, members { + SelectionV<T>::make(v.first), + SelectionV<U>::make(v.second), + } + { + } + + void + beforeValue(Stack & stk) override + { + stk.push(std::move(members[idx++])); + } + + std::size_t idx {0}; + std::array<SelectionPtr, 2> members; + }; + + void + beginArray(Stack & stk) override + { + stk.push(this->template make_s<Members>(this->v)); + } + }; + template<typename Map, typename Type = typename Map::mapped_type, auto Key = &Type::element_type::id> struct MapByMember : public Persistence::SelectionT<Type> { MapByMember(Map & m) : Persistence::SelectionT<Type> {s}, map {m} { } |