diff options
Diffstat (limited to 'absl/types/optional.h')
| -rw-r--r-- | absl/types/optional.h | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/absl/types/optional.h b/absl/types/optional.h index 61540cfd..134b2aff 100644 --- a/absl/types/optional.h +++ b/absl/types/optional.h @@ -282,15 +282,16 @@ class optional : private optional_internal::optional_data<T>, optional& operator=(optional&& src) = default; // Value assignment operators - template < - typename U = T, - typename = typename std::enable_if<absl::conjunction< - absl::negation< - std::is_same<optional<T>, typename std::decay<U>::type>>, - absl::negation< - absl::conjunction<std::is_scalar<T>, - std::is_same<T, typename std::decay<U>::type>>>, - std::is_constructible<T, U>, std::is_assignable<T&, U>>::value>::type> + template <typename U = T, + int&..., // Workaround an internal compiler error in GCC 5 to 10. + typename = typename std::enable_if<absl::conjunction< + absl::negation< + std::is_same<optional<T>, typename std::decay<U>::type> >, + absl::negation<absl::conjunction< + std::is_scalar<T>, + std::is_same<T, typename std::decay<U>::type> > >, + std::is_constructible<T, U>, + std::is_assignable<T&, U> >::value>::type> optional& operator=(U&& v) { this->assign(std::forward<U>(v)); return *this; @@ -298,13 +299,14 @@ class optional : private optional_internal::optional_data<T>, template < typename U, + int&..., // Workaround an internal compiler error in GCC 5 to 10. typename = typename std::enable_if<absl::conjunction< - absl::negation<std::is_same<T, U>>, + absl::negation<std::is_same<T, U> >, std::is_constructible<T, const U&>, std::is_assignable<T&, const U&>, absl::negation< optional_internal:: is_constructible_convertible_assignable_from_optional< - T, U>>>::value>::type> + T, U> > >::value>::type> optional& operator=(const optional<U>& rhs) { if (rhs) { this->assign(*rhs); @@ -315,13 +317,14 @@ class optional : private optional_internal::optional_data<T>, } template <typename U, + int&..., // Workaround an internal compiler error in GCC 5 to 10. typename = typename std::enable_if<absl::conjunction< - absl::negation<std::is_same<T, U>>, std::is_constructible<T, U>, - std::is_assignable<T&, U>, + absl::negation<std::is_same<T, U> >, + std::is_constructible<T, U>, std::is_assignable<T&, U>, absl::negation< optional_internal:: is_constructible_convertible_assignable_from_optional< - T, U>>>::value>::type> + T, U> > >::value>::type> optional& operator=(optional<U>&& rhs) { if (rhs) { this->assign(std::move(*rhs)); |