Struct `PhantomCovariantLifetime`

struct PhantomCovariantLifetime<'a>(_)

Zero-sized type used to mark a lifetime as covariant.

Covariant lifetimes must live at least as long as declared. See the reference for more information.

Note: If 'a is otherwise contravariant or invariant, the resulting type is invariant.

Layout

For all 'a, the following are guaranteed:

size_of::<PhantomCovariantLifetime<'a>>() == 0
align_of::<PhantomCovariantLifetime<'a>>() == 1

Implementations

`impl PhantomCovariantLifetime<'_>`

const fn new() -> Self: Constructs a new instance of the variance marker.

`impl Debug for PhantomCovariantLifetime<'_>`

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

`impl Variance for PhantomCovariantLifetime<'_>`

`impl<'a> Clone for PhantomCovariantLifetime<'a>`

fn clone(self: &Self) -> PhantomCovariantLifetime<'a>

`impl<'a> Copy for PhantomCovariantLifetime<'a>`

`impl<'a> Default for PhantomCovariantLifetime<'a>`

fn default() -> PhantomCovariantLifetime<'a>

`impl<'a> Eq for PhantomCovariantLifetime<'a>`

`impl<'a> Freeze for PhantomCovariantLifetime<'a>`

`impl<'a> Hash for PhantomCovariantLifetime<'a>`

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

`impl<'a> Ord for PhantomCovariantLifetime<'a>`

fn cmp(self: &Self, other: &PhantomCovariantLifetime<'a>) -> Ordering

`impl<'a> PartialEq for PhantomCovariantLifetime<'a>`

fn eq(self: &Self, other: &PhantomCovariantLifetime<'a>) -> bool

`impl<'a> PartialOrd for PhantomCovariantLifetime<'a>`

fn partial_cmp(self: &Self, other: &PhantomCovariantLifetime<'a>) -> Option<Ordering>

`impl<'a> RefUnwindSafe for PhantomCovariantLifetime<'a>`

`impl<'a> Send for PhantomCovariantLifetime<'a>`

`impl<'a> StructuralPartialEq for PhantomCovariantLifetime<'a>`

`impl<'a> Sync for PhantomCovariantLifetime<'a>`

`impl<'a> Unpin for PhantomCovariantLifetime<'a>`

`impl<'a> UnsafeUnpin for PhantomCovariantLifetime<'a>`

`impl<'a> UnwindSafe for PhantomCovariantLifetime<'a>`

`impl<T> Any for PhantomCovariantLifetime<'a>`

fn type_id(self: &Self) -> TypeId

`impl<T> Borrow for PhantomCovariantLifetime<'a>`

fn borrow(self: &Self) -> &T

`impl<T> BorrowMut for PhantomCovariantLifetime<'a>`

fn borrow_mut(self: &mut Self) -> &mut T

`impl<T> CloneToUninit for PhantomCovariantLifetime<'a>`

unsafe fn clone_to_uninit(self: &Self, dest: *mut u8)

`impl<T> From for PhantomCovariantLifetime<'a>`

fn from(t: T) -> T: Returns the argument unchanged.

`impl<T, U> Into for PhantomCovariantLifetime<'a>`

fn into(self: Self) -> U

Calls U::from(self).

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

`impl<T, U> TryFrom for PhantomCovariantLifetime<'a>`

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

`impl<T, U> TryInto for PhantomCovariantLifetime<'a>`

fn try_into(self: Self) -> Result<U, <U as TryFrom<T>>::Error>