pub struct PackedOption<T: ReservedValue>(_);
Expand description

Packed representation of Option<T>.

Implementations

Returns true if the packed option is a None value.

Returns true if the packed option is a Some value.

Expand the packed option into a normal Option.

Maps a PackedOption<T> to Option<U> by applying a function to a contained value.

Unwrap a packed Some value or panic.

Unwrap a packed Some value or panic.

Takes the value out of the packed option, leaving a None in its place.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Create a default packed option representing None.

Convert an option into its packed equivalent.

Convert t into a packed Some(x).

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

Converts this type into the (usually inferred) input type.

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 !=.

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

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Converts to this type from the input type.

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 resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

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.