llvm-project

ae2e4768 - [clang] NFC: Refactor UnsignedOrNone into OptionalUnsigned<T> with enum support (#191828)

[clang] NFC: Refactor UnsignedOrNone into OptionalUnsigned<T> with enum support (#191828) This kind optional is simpler to use when it needs to be represented in a bitfield, because it has an `unsigned` integer representation which avoids overflows. This applies to enums as well. This also adds a single use of this new functionality, migrating users of `std::optional<NullabilityKind>` This optional used to be represented as two members in a bitfield, and this simplifies things down to one.