Enum simd_json::cow::Cow

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

A clone-on-write smart pointer.

The type Cow is a smart pointer providing clone-on-write functionality: it can enclose and provide immutable access to borrowed data, and clone the data lazily when mutation or ownership is required. The type is designed to work with general borrowed data via the Borrow trait.

Cow implements Deref, which means that you can call non-mutating methods directly on the data it encloses. If mutation is desired, to_mut will obtain a mutable reference to an owned value, cloning if necessary.

If you need reference-counting pointers, note that Rc::make_mut and Arc::make_mut can provide clone-on-write functionality as well.

Examples

use std::borrow::Cow;

fn abs_all(input: &mut Cow<[i32]>) {
    for i in 0..input.len() {
        let v = input[i];
        if v < 0 {
            // Clones into a vector if not already owned.
            input.to_mut()[i] = -v;
        }
    }
}

// No clone occurs because `input` doesn't need to be mutated.
let slice = [0, 1, 2];
let mut input = Cow::from(&slice[..]);
abs_all(&mut input);

// Clone occurs because `input` needs to be mutated.
let slice = [-1, 0, 1];
let mut input = Cow::from(&slice[..]);
abs_all(&mut input);

// No clone occurs because `input` is already owned.
let mut input = Cow::from(vec![-1, 0, 1]);
abs_all(&mut input);

Another example showing how to keep Cow in a struct:

use std::borrow::Cow;

struct Items<'a, X: 'a> where [X]: ToOwned<Owned = Vec<X>> {
    values: Cow<'a, [X]>,
}

impl<'a, X: Clone + 'a> Items<'a, X> where [X]: ToOwned<Owned = Vec<X>> {
    fn new(v: Cow<'a, [X]>) -> Self {
        Items { values: v }
    }
}

// Creates a container from borrowed values of a slice
let readonly = [1, 2];
let borrowed = Items::new((&readonly[..]).into());
match borrowed {
    Items { values: Cow::Borrowed(b) } => println!("borrowed {:?}", b),
    _ => panic!("expect borrowed value"),
}

let mut clone_on_write = borrowed;
// Mutates the data from slice into owned vec and pushes a new value on top
clone_on_write.values.to_mut().push(3);
println!("clone_on_write = {:?}", clone_on_write.values);

// The data was mutated. Let check it out.
match clone_on_write {
    Items { values: Cow::Owned(_) } => println!("clone_on_write contains owned data"),
    _ => panic!("expect owned data"),
}

Variants

Borrowed(&'a B)

Borrowed data.

Owned(<B as ToOwned>::Owned)

Owned data.

Implementations

impl<'_, B> Cow<'_, B> where
    B: ToOwned + ?Sized, 

pub fn is_borrowed(&self) -> bool

🔬 This is a nightly-only experimental API. (cow_is_borrowed)

Returns true if the data is borrowed, i.e. if to_mut would require additional work.

Examples

#![feature(cow_is_borrowed)]
use std::borrow::Cow;

let cow = Cow::Borrowed("moo");
assert!(cow.is_borrowed());

let bull: Cow<'_, str> = Cow::Owned("...moo?".to_string());
assert!(!bull.is_borrowed());

pub fn is_owned(&self) -> bool

🔬 This is a nightly-only experimental API. (cow_is_borrowed)

Returns true if the data is owned, i.e. if to_mut would be a no-op.

Examples

#![feature(cow_is_borrowed)]
use std::borrow::Cow;

let cow: Cow<'_, str> = Cow::Owned("moo".to_string());
assert!(cow.is_owned());

let bull = Cow::Borrowed("...moo?");
assert!(!bull.is_owned());

pub fn to_mut(&mut self) -> &mut <B as ToOwned>::Owned

Acquires a mutable reference to the owned form of the data.

Clones the data if it is not already owned.

Examples

use std::borrow::Cow;

let mut cow = Cow::Borrowed("foo");
cow.to_mut().make_ascii_uppercase();

assert_eq!(
  cow,
  Cow::Owned(String::from("FOO")) as Cow<str>
);

pub fn into_owned(self) -> <B as ToOwned>::Owned

Extracts the owned data.

Clones the data if it is not already owned.

Examples

Calling into_owned on a Cow::Borrowed clones the underlying data and becomes a Cow::Owned:

use std::borrow::Cow;

let s = "Hello world!";
let cow = Cow::Borrowed(s);

assert_eq!(
  cow.into_owned(),
  String::from(s)
);

Calling into_owned on a Cow::Owned is a no-op:

use std::borrow::Cow;

let s = "Hello world!";
let cow: Cow<str> = Cow::Owned(String::from(s));

assert_eq!(
  cow.into_owned(),
  String::from(s)
);

Trait Implementations

impl<'a> Add<&'a str> for Cow<'a, str>

type Output = Cow<'a, str>

The resulting type after applying the + operator.

pub fn add(self, rhs: &'a str) -> <Cow<'a, str> as Add<&'a str>>::Output

Performs the + operation.

impl<'a> Add<Cow<'a, str>> for Cow<'a, str>

type Output = Cow<'a, str>

The resulting type after applying the + operator.

pub fn add(
    self,
    rhs: Cow<'a, str>
) -> <Cow<'a, str> as Add<Cow<'a, str>>>::Output

Performs the + operation.

impl<'a> AddAssign<&'a str> for Cow<'a, str>

pub fn add_assign(&mut self, rhs: &'a str)

Performs the += operation.

impl<'a> AddAssign<Cow<'a, str>> for Cow<'a, str>

pub fn add_assign(&mut self, rhs: Cow<'a, str>)

Performs the += operation.

impl<'_> AsRef<Path> for Cow<'_, OsStr>

pub fn as_ref(&self) -> &Path

Performs the conversion.

impl<'_, T> AsRef<T> for Cow<'_, T> where
    T: ToOwned + ?Sized, 

pub fn as_ref(&self) -> &T

Performs the conversion.

impl<'a, B> Borrow<B> for Cow<'a, B> where
    B: ToOwned + ?Sized,
    <B as ToOwned>::Owned: 'a, 

pub fn borrow(&self) -> &B

Immutably borrows from an owned value.

impl<'_, B> Clone for Cow<'_, B> where
    B: ToOwned + ?Sized, 

pub fn clone(&self) -> Cow<'_, B>

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Cow<'_, B>)

Performs copy-assignment from source.

impl<'_, B> Debug for Cow<'_, B> where
    B: Debug + ToOwned + ?Sized,
    <B as ToOwned>::Owned: Debug, 

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

Formats the value using the given formatter.

impl<'_, B> Default for Cow<'_, B> where
    B: ToOwned + ?Sized,
    <B as ToOwned>::Owned: Default, 

pub fn default() -> Cow<'_, B>

Creates an owned Cow<’a, B> with the default value for the contained owned value.

impl<'_, B> Deref for Cow<'_, B> where
    B: ToOwned + ?Sized, 

type Target = B

The resulting type after dereferencing.

pub fn deref(&self) -> &B

Dereferences the value.

impl<'de, 'a, T> Deserialize<'de> for Cow<'a, T> where
    T: ToOwned + ?Sized,
    <T as ToOwned>::Owned: Deserialize<'de>, 

pub fn deserialize<D>(
    deserializer: D
) -> Result<Cow<'a, T>, <D as Deserializer<'de>>::Error> where
    D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl<'_, B> Display for Cow<'_, B> where
    B: Display + ToOwned + ?Sized,
    <B as ToOwned>::Owned: Display, 

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

Formats the value using the given formatter.

impl<'a, T> From<&'a [T]> for Cow<'a, [T]> where
    T: Clone, 

pub fn from(s: &'a [T]) -> Cow<'a, [T]>

Creates a Borrowed variant of Cow from a slice.

This conversion does not allocate or clone the data.

impl<'a> From<&'a CStr> for Cow<'a, CStr>

pub fn from(s: &'a CStr) -> Cow<'a, CStr>

Performs the conversion.

impl<'a> From<&'a CString> for Cow<'a, CStr>

pub fn from(s: &'a CString) -> Cow<'a, CStr>

Performs the conversion.

impl<'a> From<&'a OsStr> for Cow<'a, OsStr>

pub fn from(s: &'a OsStr) -> Cow<'a, OsStr>

Performs the conversion.

impl<'a> From<&'a OsString> for Cow<'a, OsStr>

pub fn from(s: &'a OsString) -> Cow<'a, OsStr>

Performs the conversion.

impl<'a> From<&'a Path> for Cow<'a, Path>

pub fn from(s: &'a Path) -> Cow<'a, Path>

Creates a clone-on-write pointer from a reference to Path.

This conversion does not clone or allocate.

impl<'a> From<&'a PathBuf> for Cow<'a, Path>

pub fn from(p: &'a PathBuf) -> Cow<'a, Path>

Creates a clone-on-write pointer from a reference to PathBuf.

This conversion does not clone or allocate.

impl<'a> From<&'a String> for Cow<'a, str>

pub fn from(s: &'a String) -> Cow<'a, str>

Converts a String reference into a Borrowed variant. No heap allocation is performed, and the string is not copied.

Example

let s = "eggplant".to_string();
assert_eq!(Cow::from(&s), Cow::Borrowed("eggplant"));

impl<'a, T> From<&'a Vec<T, Global>> for Cow<'a, [T]> where
    T: Clone, 

pub fn from(v: &'a Vec<T, Global>) -> Cow<'a, [T]>

Creates a Borrowed variant of Cow from a reference to Vec.

This conversion does not allocate or clone the data.

impl<'a> From<&'a str> for Cow<'a, str>

pub fn from(s: &'a str) -> Cow<'a, str>

Converts a string slice into a Borrowed variant. No heap allocation is performed, and the string is not copied.

Example

assert_eq!(Cow::from("eggplant"), Cow::Borrowed("eggplant"));

impl<'a> From<CString> for Cow<'a, CStr>

pub fn from(s: CString) -> Cow<'a, CStr>

Performs the conversion.

impl<'value> From<Cow<'value, str>> for Value<'value>

fn from(c: Cow<'value, str>) -> Self

Performs the conversion.

impl<'value> From<Cow<'value, str>> for Value

fn from(c: Cow<'value, str>) -> Self

Performs the conversion.

impl<'a> From<OsString> for Cow<'a, OsStr>

pub fn from(s: OsString) -> Cow<'a, OsStr>

Performs the conversion.

impl<'a> From<PathBuf> for Cow<'a, Path>

pub fn from(s: PathBuf) -> Cow<'a, Path>

Creates a clone-on-write pointer from an owned instance of PathBuf.

This conversion does not clone or allocate.

impl<'a> From<String> for Cow<'a, str>

pub fn from(s: String) -> Cow<'a, str>

Converts a String into an Owned variant. No heap allocation is performed, and the string is not copied.

Example

let s = "eggplant".to_string();
let s2 = "eggplant".to_string();
assert_eq!(Cow::from(s), Cow::<'static, str>::Owned(s2));

impl<'a, T> From<Vec<T, Global>> for Cow<'a, [T]> where
    T: Clone, 

pub fn from(v: Vec<T, Global>) -> Cow<'a, [T]>

Creates an Owned variant of Cow from an owned instance of Vec.

This conversion does not allocate or clone the data.

impl<'a, 'b> FromIterator<&'b str> for Cow<'a, str>

pub fn from_iter<I>(it: I) -> Cow<'a, str> where
    I: IntoIterator<Item = &'b str>, 

Creates a value from an iterator.

impl<'a> FromIterator<String> for Cow<'a, str>

pub fn from_iter<I>(it: I) -> Cow<'a, str> where
    I: IntoIterator<Item = String>, 

Creates a value from an iterator.

impl<'a, T> FromIterator<T> for Cow<'a, [T]> where
    T: Clone, 

pub fn from_iter<I>(it: I) -> Cow<'a, [T]> where
    I: IntoIterator<Item = T>, 

Creates a value from an iterator.

impl<'a> FromIterator<char> for Cow<'a, str>

pub fn from_iter<I>(it: I) -> Cow<'a, str> where
    I: IntoIterator<Item = char>, 

Creates a value from an iterator.

impl<'_, B> Hash for Cow<'_, B> where
    B: Hash + ToOwned + ?Sized, 

pub 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, 

Feeds a slice of this type into the given Hasher.

impl<'de, 'a, E> IntoDeserializer<'de, E> for Cow<'a, str> where
    E: Error, 

type Deserializer = CowStrDeserializer<'a, E>

The type of the deserializer being converted into.

pub fn into_deserializer(self) -> CowStrDeserializer<'a, E>

Convert this value into a deserializer.

impl<'_, B> Ord for Cow<'_, B> where
    B: Ord + ToOwned + ?Sized, 

pub fn cmp(&self, other: &Cow<'_, B>) -> Ordering

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl<'_, '_, T, U> PartialEq<&'_ [U]> for Cow<'_, [T]> where
    T: PartialEq<U> + Clone, 

pub fn eq(&self, other: &&[U]) -> bool

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

pub fn ne(&self, other: &&[U]) -> bool

This method tests for !=.

impl<'_, '_, T, U> PartialEq<&'_ mut [U]> for Cow<'_, [T]> where
    T: PartialEq<U> + Clone, 

pub fn eq(&self, other: &&mut [U]) -> bool

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

pub fn ne(&self, other: &&mut [U]) -> bool

This method tests for !=.

impl<'a, 'b> PartialEq<&'a Path> for Cow<'b, OsStr>

pub fn eq(&self, other: &&'a Path) -> 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 !=.

impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, Path>

pub fn eq(&self, other: &&'b OsStr) -> 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 !=.

impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, OsStr>

pub fn eq(&self, other: &&'b OsStr) -> 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 !=.

impl<'a, 'b> PartialEq<&'b Path> for Cow<'a, Path>

pub fn eq(&self, other: &&'b Path) -> 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 !=.

impl<'a, 'b> PartialEq<&'b str> for Cow<'a, str>

pub fn eq(&self, other: &&'b str) -> bool

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

pub fn ne(&self, other: &&'b str) -> bool

This method tests for !=.

impl<'a, 'b, B, C> PartialEq<Cow<'b, C>> for Cow<'a, B> where
    C: ToOwned + ?Sized,
    B: PartialEq<C> + ToOwned + ?Sized, 

pub fn eq(&self, other: &Cow<'b, C>) -> 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 !=.

impl<'a, 'b> PartialEq<OsStr> for Cow<'a, OsStr>

pub fn eq(&self, other: &OsStr) -> 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 !=.

impl<'a, 'b> PartialEq<OsStr> for Cow<'a, Path>

pub fn eq(&self, other: &OsStr) -> 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 !=.

impl<'a, 'b> PartialEq<OsString> for Cow<'a, OsStr>

pub fn eq(&self, other: &OsString) -> 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 !=.

impl<'a, 'b> PartialEq<OsString> for Cow<'a, Path>

pub fn eq(&self, other: &OsString) -> 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 !=.

impl<'a, 'b> PartialEq<Path> for Cow<'a, OsStr>

pub fn eq(&self, other: &Path) -> 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 !=.

impl<'a, 'b> PartialEq<Path> for Cow<'a, Path>

pub fn eq(&self, other: &Path) -> 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 !=.

impl<'a, 'b> PartialEq<PathBuf> for Cow<'a, Path>

pub fn eq(&self, other: &PathBuf) -> 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 !=.

impl<'a, 'b> PartialEq<PathBuf> for Cow<'a, OsStr>

pub fn eq(&self, other: &PathBuf) -> 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 !=.

impl<'a, 'b> PartialEq<String> for Cow<'a, str>

pub fn eq(&self, other: &String) -> bool

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

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

This method tests for !=.

impl<'_, T, U, A> PartialEq<Vec<U, A>> for Cow<'_, [T]> where
    T: PartialEq<U> + Clone,
    A: Allocator, 

pub fn eq(&self, other: &Vec<U, A>) -> bool

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

pub fn ne(&self, other: &Vec<U, A>) -> bool

This method tests for !=.

impl<'a, 'b> PartialEq<str> for Cow<'a, str>

pub fn eq(&self, other: &str) -> bool

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

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

This method tests for !=.

impl<'a, 'b> PartialOrd<&'a Path> for Cow<'b, OsStr>

pub fn partial_cmp(&self, other: &&'a Path) -> 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<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, Path>

pub fn partial_cmp(&self, other: &&'b OsStr) -> 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<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, OsStr>

pub fn partial_cmp(&self, other: &&'b OsStr) -> 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<'a, 'b> PartialOrd<&'b Path> for Cow<'a, Path>

pub fn partial_cmp(&self, other: &&'b Path) -> 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<'a, B> PartialOrd<Cow<'a, B>> for Cow<'a, B> where
    B: PartialOrd<B> + ToOwned + ?Sized, 

pub fn partial_cmp(&self, other: &Cow<'a, B>) -> 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<'a, 'b> PartialOrd<OsStr> for Cow<'a, OsStr>

pub fn partial_cmp(&self, other: &OsStr) -> 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<'a, 'b> PartialOrd<OsStr> for Cow<'a, Path>

pub fn partial_cmp(&self, other: &OsStr) -> 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<'a, 'b> PartialOrd<OsString> for Cow<'a, OsStr>

pub fn partial_cmp(&self, other: &OsString) -> 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<'a, 'b> PartialOrd<OsString> for Cow<'a, Path>

pub fn partial_cmp(&self, other: &OsString) -> 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<'a, 'b> PartialOrd<Path> for Cow<'a, OsStr>

pub fn partial_cmp(&self, other: &Path) -> 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<'a, 'b> PartialOrd<Path> for Cow<'a, Path>

pub fn partial_cmp(&self, other: &Path) -> 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<'a, 'b> PartialOrd<PathBuf> for Cow<'a, OsStr>

pub fn partial_cmp(&self, other: &PathBuf) -> 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<'a, 'b> PartialOrd<PathBuf> for Cow<'a, Path>

pub fn partial_cmp(&self, other: &PathBuf) -> 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<'a, T> Serialize for Cow<'a, T> where
    T: Serialize + ToOwned + ?Sized, 

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

Serialize this value into the given Serde serializer.

impl<'_> ToString for Cow<'_, str>

pub fn to_string(&self) -> String

Converts the given value to a String.

impl<'_, B> Eq for Cow<'_, B> where
    B: Eq + ToOwned + ?Sized,