#pragma once
-#include <folly/detail/TryDetail.h>
+#include <folly/Utility.h>
+
#include <stdexcept>
+#include <tuple>
namespace folly {
return value_;
}
+template <class T>
+const T&& Try<T>::value() const && {
+ throwIfFailed();
+ return std::move(value_);
+}
+
template <class T>
void Try<T>::throwIfFailed() const {
switch (contains_) {
}
}
-template <typename T>
-inline T moveFromTry(Try<T>& t) {
- return std::move(t.value());
-}
-
-inline void moveFromTry(Try<void>& t) {
- return t.value();
-}
-
template <typename F>
typename std::enable_if<
!std::is_same<typename std::result_of<F()>::type, void>::value,
}
}
-template <typename... Ts>
-std::tuple<Ts...> unwrapTryTuple(std::tuple<folly::Try<Ts>...>&& ts) {
- return detail::TryTuple<Ts...>::unwrap(
- std::forward<std::tuple<folly::Try<Ts>...>>(ts));
+namespace try_detail {
+
+/**
+ * Trait that removes the layer of Try abstractions from the passed in type
+ */
+template <typename Type>
+struct RemoveTry;
+template <template <typename...> class TupleType, typename... Types>
+struct RemoveTry<TupleType<folly::Try<Types>...>> {
+ using type = TupleType<Types...>;
+};
+
+template <std::size_t... Indices, typename Tuple>
+auto unwrapTryTupleImpl(folly::index_sequence<Indices...>, Tuple&& instance) {
+ using std::get;
+ using ReturnType = typename RemoveTry<typename std::decay<Tuple>::type>::type;
+ return ReturnType{(get<Indices>(std::forward<Tuple>(instance)).value())...};
+}
+} // namespace try_detail
+
+template <typename Tuple>
+auto unwrapTryTuple(Tuple&& instance) {
+ using TupleDecayed = typename std::decay<Tuple>::type;
+ using Seq = folly::make_index_sequence<std::tuple_size<TupleDecayed>::value>;
+ return try_detail::unwrapTryTupleImpl(Seq{}, std::forward<Tuple>(instance));
}
-} // folly
+} // namespace folly