diff options
Diffstat (limited to 'absl/types/optional.h')
| -rw-r--r-- | absl/types/optional.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/absl/types/optional.h b/absl/types/optional.h index a86dea92c4ac..c0488797adaa 100644 --- a/absl/types/optional.h +++ b/absl/types/optional.h @@ -513,10 +513,11 @@ class optional : private optional_internal::optional_data<T>, // the arguments `std::forward<Args>(args)...` within the `optional`. // (The `in_place_t` is a tag used to indicate that the contained object // should be constructed in-place.) - // - // TODO(absl-team): Add std::is_constructible<T, Args&&...> SFINAE. - template <typename... Args> - constexpr explicit optional(in_place_t, Args&&... args) + template <typename InPlaceT, typename... Args, + absl::enable_if_t<absl::conjunction< + std::is_same<InPlaceT, in_place_t>, + std::is_constructible<T, Args&&...> >::value>* = nullptr> + constexpr explicit optional(InPlaceT, Args&&... args) : data_base(in_place_t(), absl::forward<Args>(args)...) {} // Constructs a non-empty `optional` direct-initialized value of type `T` from |