Enum TryCow 

pub enum TryCow<'a, B>
where
    B: 'a + TryToOwned + ?Sized,
{
    Borrowed(&'a B),
    Owned(<B as TryToOwned>::Owned),
}

Like std::borrow::Cow but returns OutOfMemory errors for various APIs that force allocation of an owned copy.

Variants

Borrowed(&'a B)

Borrowed data.

Owned(<B as TryToOwned>::Owned)

Owned data.

Implementations

impl<'a, B> TryCow<'a, B>

where B: TryToOwned + ?Sized,

pub fn to_mut(&mut self) -> Result<&mut <B as TryToOwned>::Owned, OutOfMemory>

Same as std::borrow::Cow::to_mut but returns an OutOfMemory error on allocation failure.

pub fn into_owned(self) -> Result<<B as TryToOwned>::Owned, OutOfMemory>

Same as std::borrow::Cow::into_owned but returns an OutOfMemory error on allocation failure.

Trait Implementations

impl<B> AsRef<B> for TryCow<'_, B>

where B: TryToOwned + ?Sized,

fn as_ref(&self) -> &B

Converts this type into a shared reference of the (usually inferred) input type.

impl<'a, B> Borrow<B> for TryCow<'a, B>

where B: TryToOwned + ?Sized,

fn borrow(&self) -> &B

Immutably borrows from an owned value.

impl<B> Debug for TryCow<'_, B>

where B: Debug + TryToOwned + ?Sized, <B as TryToOwned>::Owned: Debug,

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

Formats the value using the given formatter.

impl<B> Default for TryCow<'_, B>

where B: TryToOwned + ?Sized, <B as TryToOwned>::Owned: Default,

fn default() -> TryCow<'_, B>

Returns the “default value” for a type.

impl<B> Deref for TryCow<'_, B>

where B: TryToOwned + ?Sized,

type Target = B

The resulting type after dereferencing.

fn deref(&self) -> &B

Dereferences the value.

impl<'a, B> From<&'a B> for TryCow<'a, B>

where B: 'a + TryToOwned + ?Sized,

fn from(b: &'a B) -> TryCow<'a, B>

Converts to this type from the input type.

impl<B> Hash for TryCow<'_, B>

where B: Hash + TryToOwned + ?Sized,

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

where H: Hasher,

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<B> Ord for TryCow<'_, B>

where B: Ord + TryToOwned + ?Sized,

fn cmp(&self, other: &TryCow<'_, B>) -> 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,

Restrict a value to a certain interval.

impl<B> PartialEq for TryCow<'_, B>

where B: PartialEq + TryToOwned + ?Sized,

fn eq(&self, other: &TryCow<'_, B>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

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

impl<B> PartialOrd for TryCow<'_, B>

where B: PartialOrd + TryToOwned + ?Sized,

fn partial_cmp(&self, other: &TryCow<'_, B>) -> Option<Ordering>

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl<B> TryClone for TryCow<'_, B>

where B: TryToOwned + ?Sized,

fn try_clone(&self) -> Result<TryCow<'_, B>, OutOfMemory>

Attempt to clone self, returning an error if any allocation fails during cloning.

fn clone_panic_on_oom(&self) -> Self

Clone self, panicking on allocation failure.

impl<B> Eq for TryCow<'_, B>

where B: Eq + TryToOwned + ?Sized,