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#[repr(transparent)]
pub struct ArchivedOptionBox<T: ArchivePointee + ?Sized> { /* private fields */ }
Expand description

A niched archived Option<Box<T>>.

It uses less space by storing the None variant as a null pointer.

Implementations

Returns true if the option box is a None value.

Returns true if the option box is a Some value.

Converts to an Option<&ArchivedBox<T>>.

Converts to an Option<&mut ArchivedBox<T>>.

Converts from Pin<&ArchivedOptionBox<T>> to Option<Pin<&ArchivedBox<T>>>.

Converts from Pin<&mut ArchivedOption<T>> to Option<Pin<&mut ArchivedBox<T>>>.

Returns an iterator over the possibly contained value.

Returns a mutable iterator over the possibly contained value.

Converts from &ArchivedOptionBox<T> to Option<&T>.

Leaves the original ArchivedOptionBox in-place, creating a new one with a reference to the original one.

Resolves an ArchivedOptionBox<T::Archived> from an Option<&T>.

Safety
  • pos must be the position of out within the archive
  • resolver must be the result of serializing field

Serializes an ArchivedOptionBox<T::Archived> from an Option<&T>.

Trait Implementations

Formats the value using the given formatter. Read more
Deserializes the field type F using the given deserializer.
Feeds this value into the given Hasher. Read more
Feeds a slice of this type into the given Hasher. Read more
This method returns an Ordering between self and other. Read more
Compares and returns the maximum of two values. Read more
Compares and returns the minimum of two values. Read more
Restrict a value to a certain interval. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
The archived version of the pointer metadata for this type.
Converts some archived metadata to the pointer metadata for itself.
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Deserializes using the given deserializer

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type for metadata in pointers and references to Self.
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.