Enum abi_stable::std_types::cow::RCow

#[repr(C)]
pub enum RCow<B, O> {
    Borrowed(B),
    Owned(O),
}

Ffi-safe equivalent of std::borrow::Cow.

This has type aliases for the three most common usecases:

• RCowStr: contains an RStr<'_> or an RString.

• RCowSlice: contains an RSlice<'_, T> or an RVec<T>.

• RCowVal: contains a &T or a T.

Example

Using a RCowStr<'a>.

This implements a solution to the well known fizzbuzz problem.

use abi_stable::std_types::{RCow, RCowStr};

fn fizzbuzz(n: u32) -> RCowStr<'static> {
    match (n % 3, n % 5) {
        (0, 0) => RCow::from("FizzBuzz"),
        (0, _) => RCow::from("Fizz"),
        (_, 0) => RCow::from("Buzz"),
        (_, _) => RCow::from(n.to_string()),
    }
}

for n in 1..=100 {
    println!("{}", fizzbuzz(n));
}

Note: this example allocates when the number is neither a multiple of 5 or 3.

Variants

Borrowed(B)

Owned(O)

Implementations

impl<B> RCow<B, B::ROwned>

where B: IntoOwned,

pub fn to_mut(&mut self) -> &mut B::ROwned

Get a mutable reference to the owned form of RCow, converting to the owned form if it is currently the borrowed form.

Examples

use abi_stable::std_types::{RCow, RCowStr};

let mut cow: RCowStr<'_> = RCow::from("Hello");

assert_eq!(&*cow, "Hello");
assert!(cow.is_borrowed());

cow.to_mut().push_str(", world!");

assert!(cow.is_owned());
assert_eq!(cow, RCow::from("Hello, world!"));

pub fn into_owned(self) -> B::ROwned

Unwraps into the owned owner form of RCow, converting to the owned form if it is currently the borrowed form.

Examples

use abi_stable::std_types::{RCow, RCowStr};

let mut cow: RCowStr<'_> = RCow::from("Hello");

assert_eq!(&*cow, "Hello");

let mut buff = cow.into_owned();
buff.push_str(", world!");

assert_eq!(&*buff, "Hello, world!");

pub fn borrowed(&self) -> &<B as Deref>::Target

Gets the contents of the RCow casted to the borrowed variant.

Examples

use abi_stable::std_types::{RCow, RCowSlice, RSlice};
{
    let cow: RCowSlice<'_, u8> = RCow::from(&[0, 1, 2, 3][..]);
    assert_eq!(cow.borrowed(), RSlice::from_slice(&[0, 1, 2, 3]));
}
{
    let cow: RCowSlice<'_, u8> = RCow::from(vec![0, 1, 2, 3]);
    assert_eq!(cow.borrowed(), RSlice::from_slice(&[0, 1, 2, 3]));
}

impl<B, O> RCow<B, O>

pub const fn is_borrowed(&self) -> bool

Whether this is a borrowing RCow.

Examples

use abi_stable::std_types::{RCow, RCowSlice};

{
    let cow: RCowSlice<'_, u8> = RCow::from(&[0, 1, 2, 3][..]);
    assert!(cow.is_borrowed());
}
{
    let cow: RCowSlice<'_, u8> = RCow::from(vec![0, 1, 2, 3]);
    assert!(!cow.is_borrowed());
}

pub const fn is_owned(&self) -> bool

Whether this is an owning RCow.

Examples

use abi_stable::std_types::{RCow, RCowSlice};

let cow: RCowSlice<'_, u8> = RCow::from(&[0, 1, 2, 3][..]);
assert!(!cow.is_owned());

let cow: RCowSlice<'_, u8> = RCow::from(vec![0, 1, 2, 3]);
assert!(cow.is_owned());

impl<'a> RCow<RStr<'a>, RString>

pub const fn from_str(this: &'a str) -> Self

For converting a &'a [T] to an RCowSlice<'a, T>, most useful when converting from &'a [T;N] because it coerces the array to a slice.

Example

use abi_stable::std_types::{RCow, RCowStr};

const C: RCowStr<'_> = RCow::from_str("hello");

assert_eq!(C, "hello");

pub fn as_str(&self) -> &str

Borrows this RCow as a str.

Conditional const fn

This function requires the rust_1_64 feature to be const-callable

Example

use abi_stable::std_types::RCow;

let cow = RCow::from_str("world");

assert_eq!(cow.as_str(), "world")

impl<'a, T> RCow<RSlice<'a, T>, RVec<T>>

pub const fn from_slice(this: &'a [T]) -> Self

For converting a &'a [T] to an RCowSlice<'a, T>, most useful when converting from &'a [T;N] because it coerces the array to a slice.

Example

use abi_stable::std_types::{RCow, RCowSlice};

const C: RCowSlice<'_, u8> = RCow::from_slice(&[3, 5, 8]);

assert_eq!(C, [3, 5, 8]);

pub fn as_slice(&self) -> &[T]

Borrows this RCow as a slice.

Conditional const fn

This function requires the rust_1_64 feature to be const-callable

Example

use abi_stable::std_types::RCow;

let cow = RCow::from_slice(&[3, 5, 8]);

assert_eq!(cow.as_slice(), [3, 5, 8])

Trait Implementations

impl<B> Clone for RCow<B, B::ROwned>

where B: IntoOwned, B::ROwned: Clone,

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<B> Debug for RCow<B, B::ROwned>

where B: IntoOwned, B::Target: Debug,

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

Formats the value using the given formatter.

impl<B> Deref for RCow<B, B::ROwned>

where B: IntoOwned,

type Target = <B as Deref>::Target

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<B> Display for RCow<B, B::ROwned>

where B: IntoOwned, B::Target: Display,

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

Formats the value using the given formatter.

impl<'a, T> From<Cow<'a, T>> for RCow<T::RefC, T::ROwned>

where T: ?Sized + RCowCompatibleRef<'a>,

fn from(this: Cow<'a, T>) -> RCow<T::RefC, T::ROwned>

Converts to this type from the input type.

impl<'a, T, B> From<RCow<B, <T as RCowCompatibleRef<'a>>::ROwned>> for Cow<'a, T>

where T: ?Sized + RCowCompatibleRef<'a, RefC = B>, B: IntoOwned<ROwned = T::ROwned, Target = T>,

fn from(this: RCow<B, T::ROwned>) -> Cow<'a, T>

Converts to this type from the input type.

impl<B, O> GetStaticEquivalent_ for RCow<B, O>

where B: __StableAbi, O: __StableAbi,

type StaticEquivalent = _static_RCow<<B as GetStaticEquivalent_>::StaticEquivalent, <O as GetStaticEquivalent_>::StaticEquivalent>

The 'static equivalent of Self

impl<B> Hash for RCow<B, B::ROwned>

where B: IntoOwned, B::Target: Hash,

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 RCow<B, B::ROwned>

where B: IntoOwned, B::Target: Ord,

fn cmp(&self, other: &Self) -> 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<U: PartialEq<T>, T> PartialEq<RCow<RSlice<'_, T>, RVec<T>>> for &[U]

where T: Clone,

fn eq(&self, other: &RCowSlice<'_, T>) -> 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<U: PartialEq<T>, T> PartialEq<RCow<RSlice<'_, T>, RVec<T>>> for [U]

where T: Clone,

fn eq(&self, other: &RCowSlice<'_, T>) -> 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<U: PartialEq<T>, T, const N: usize> PartialEq<RCow<RSlice<'_, T>, RVec<T>>> for [U; N]

where T: Clone,

fn eq(&self, other: &RCowSlice<'_, T>) -> 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<U, T> PartialEq<RCow<RSlice<'_, T>, RVec<T>>> for Cow<'_, [U]>

where T: Clone, U: Clone + PartialEq<T>,

fn eq(&self, other: &RCowSlice<'_, T>) -> 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<U: PartialEq<T>, T> PartialEq<RCow<RSlice<'_, T>, RVec<T>>> for Vec<U>

where T: Clone,

fn eq(&self, other: &RCowSlice<'_, T>) -> 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<T, U> PartialEq<RCow<RSlice<'_, U>, RVec<U>>> for RSlice<'_, T>

where T: Clone + PartialEq<U>, U: Clone,

fn eq(&self, other: &RCowSlice<'_, U>) -> 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<T, U> PartialEq<RCow<RSlice<'_, U>, RVec<U>>> for RSliceMut<'_, T>

where T: Clone + PartialEq<U>, U: Clone,

fn eq(&self, other: &RCowSlice<'_, U>) -> 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<T, U> PartialEq<RCow<RSlice<'_, U>, RVec<U>>> for RVec<T>

where T: Clone + PartialEq<U>, U: Clone,

fn eq(&self, other: &RCowSlice<'_, U>) -> 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 PartialEq<RCow<RStr<'_>, RString>> for &str

fn eq(&self, other: &RCowStr<'_>) -> 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 PartialEq<RCow<RStr<'_>, RString>> for Cow<'_, str>

fn eq(&self, other: &RCowStr<'_>) -> 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 PartialEq<RCow<RStr<'_>, RString>> for RStr<'_>

fn eq(&self, other: &RCowStr<'_>) -> 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 PartialEq<RCow<RStr<'_>, RString>> for RString

fn eq(&self, other: &RCowStr<'_>) -> 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 PartialEq<RCow<RStr<'_>, RString>> for String

fn eq(&self, other: &RCowStr<'_>) -> 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 PartialEq<RCow<RStr<'_>, RString>> for str

fn eq(&self, other: &RCowStr<'_>) -> 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, V> PartialEq<RCow<V, <V as IntoOwned>::ROwned>> for RCow<B, B::ROwned>

where B: IntoOwned, V: IntoOwned, B::Target: PartialEq<V::Target>,

fn eq(&self, other: &RCow<V, V::ROwned>) -> 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<U, T> PartialOrd<RCow<RSlice<'_, T>, RVec<T>>> for &[U]

where U: PartialOrd<T>, [U]: PartialOrd<[T]>, T: Clone,

fn partial_cmp(&self, other: &RCowSlice<'_, T>) -> 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<U, T> PartialOrd<RCow<RSlice<'_, T>, RVec<T>>> for [U]

where U: PartialOrd<T>, [U]: PartialOrd<[T]>, T: Clone,

fn partial_cmp(&self, other: &RCowSlice<'_, T>) -> 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<U, T, const N: usize> PartialOrd<RCow<RSlice<'_, T>, RVec<T>>> for [U; N]

where U: PartialOrd<T>, [U]: PartialOrd<[T]>, T: Clone,

fn partial_cmp(&self, other: &RCowSlice<'_, T>) -> 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<U, T> PartialOrd<RCow<RSlice<'_, T>, RVec<T>>> for Cow<'_, [U]>

where U: PartialOrd<T> + Clone, [U]: PartialOrd<[T]>, T: Clone,

fn partial_cmp(&self, other: &RCowSlice<'_, T>) -> 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<U, T> PartialOrd<RCow<RSlice<'_, T>, RVec<T>>> for Vec<U>

where U: PartialOrd<T>, [U]: PartialOrd<[T]>, T: Clone,

fn partial_cmp(&self, other: &RCowSlice<'_, T>) -> 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<T, U> PartialOrd<RCow<RSlice<'_, U>, RVec<U>>> for RSlice<'_, T>

where T: PartialOrd<U> + Clone, [T]: PartialOrd<[U]>, U: Clone,

fn partial_cmp(&self, other: &RCowSlice<'_, U>) -> 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<T, U> PartialOrd<RCow<RSlice<'_, U>, RVec<U>>> for RSliceMut<'_, T>

where T: PartialOrd<U> + Clone, [T]: PartialOrd<[U]>, U: Clone,

fn partial_cmp(&self, other: &RCowSlice<'_, U>) -> 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<T, U> PartialOrd<RCow<RSlice<'_, U>, RVec<U>>> for RVec<T>

where T: PartialOrd<U> + Clone, [T]: PartialOrd<[U]>, U: Clone,

fn partial_cmp(&self, other: &RCowSlice<'_, U>) -> 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 PartialOrd<RCow<RStr<'_>, RString>> for &str

fn partial_cmp(&self, other: &RCowStr<'_>) -> 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 PartialOrd<RCow<RStr<'_>, RString>> for Cow<'_, str>

fn partial_cmp(&self, other: &RCowStr<'_>) -> 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 PartialOrd<RCow<RStr<'_>, RString>> for RStr<'_>

fn partial_cmp(&self, other: &RCowStr<'_>) -> 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 PartialOrd<RCow<RStr<'_>, RString>> for RString

fn partial_cmp(&self, other: &RCowStr<'_>) -> 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 PartialOrd<RCow<RStr<'_>, RString>> for String

fn partial_cmp(&self, other: &RCowStr<'_>) -> 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 PartialOrd<RCow<RStr<'_>, RString>> for str

fn partial_cmp(&self, other: &RCowStr<'_>) -> 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, V> PartialOrd<RCow<V, <V as IntoOwned>::ROwned>> for RCow<B, B::ROwned>

where B: IntoOwned, V: IntoOwned, B::Target: PartialOrd<V::Target>,

fn partial_cmp(&self, other: &RCow<V, V::ROwned>) -> 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> Serialize for RCow<B, B::ROwned>

where B: IntoOwned, B::Target: Serialize,

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<B, O> StableAbi for RCow<B, O>

where B: __StableAbi, O: __StableAbi,

type IsNonZeroType = False

Whether this type has a single invalid bit-pattern.

const LAYOUT: &'static TypeLayout = _

The layout of the type provided by implementors.

const ABI_CONSTS: AbiConsts = _

const-equivalents of the associated types.

impl<B> Copy for RCow<B, B::ROwned>

where B: IntoOwned, B::ROwned: Copy,

impl<B> Eq for RCow<B, B::ROwned>

where B: IntoOwned, B::Target: Eq,