Struct objc2::mutability::ImmutableWithMutableSubclass

pub struct ImmutableWithMutableSubclass<MS: ?Sized> { /* private fields */ }

Marker type for immutable classes that have a mutable counterpart.

This is effectively the same as Immutable, except for the fact that classes that specify this does not implement IsRetainable, meaning that ClassType::retain does not work (see that for details on why).

The mutable counterpart must be specified as the type parameter MS to allow NSCopying and NSMutableCopying to return the correct type.

Functionality that is provided with this:

• IsIdCloneable.
• IsAllocableAnyThread.
• IsAllowedMutable.
• You are allowed to hand out pointers / references to an instance’s internal data, since you know such data will never be mutated.

Example

unsafe impl ClassType for NSString {
    type Super = NSObject;
    type Mutability = ImmutableWithMutableSubclass<NSMutableString>;
    // ...
}

unsafe impl ClassType for NSMutableString {
    type Super = NSString;
    type Mutability = MutableWithImmutableSubclass<NSString>;
    // ...
}

Trait Implementations

impl<MS: Clone + ?Sized> Clone for ImmutableWithMutableSubclass<MS>

fn clone(&self) -> ImmutableWithMutableSubclass<MS>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<MS: Debug + ?Sized> Debug for ImmutableWithMutableSubclass<MS>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<MS: Hash + ?Sized> Hash for ImmutableWithMutableSubclass<MS>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<MS: Ord + ?Sized> Ord for ImmutableWithMutableSubclass<MS>

fn cmp(&self, other: &ImmutableWithMutableSubclass<MS>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl<MS: PartialEq + ?Sized> PartialEq for ImmutableWithMutableSubclass<MS>

fn eq(&self, other: &ImmutableWithMutableSubclass<MS>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<MS: PartialOrd + ?Sized> PartialOrd for ImmutableWithMutableSubclass<MS>

fn partial_cmp( &self, other: &ImmutableWithMutableSubclass<MS> ) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<MS: Copy + ?Sized> Copy for ImmutableWithMutableSubclass<MS>

impl<MS: Eq + ?Sized> Eq for ImmutableWithMutableSubclass<MS>

impl<MS: ?Sized> Mutability for ImmutableWithMutableSubclass<MS>

impl<MS: ?Sized> StructuralPartialEq for ImmutableWithMutableSubclass<MS>