Enum validators::prelude::validators_prelude::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 const 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 const 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<'_, B> Eq for Cow<'_, B> where
    B: Eq + ToOwned + ?Sized, 

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

pub fn extend<I>(&mut self, iter: I) where
    I: IntoIterator<Item = Cow<'a, str>>, 

Extends a collection with the contents of an iterator.

pub fn extend_one(&mut self, s: Cow<'a, str>)

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

Extends a collection with exactly one element.

pub fn extend_reserve(&mut self, additional: usize)

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

Reserves capacity in a collection for the given number of additional elements.

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

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

Performs the conversion.

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>

Performs the conversion.

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

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

Performs the conversion.

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]>

Performs the conversion.

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<'a, T> From<Cow<'a, [T]>> for Vec<T, Global> where
    [T]: ToOwned,
    <[T] as ToOwned>::Owned == Vec<T, Global>, 

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

Convert a clone-on-write slice into a vector.

If s already owns a Vec<T>, it will be returned directly. If s is borrowing a slice, a new Vec<T> will be allocated and filled by cloning s’s items into it.

Examples

let o: Cow<[i32]> = Cow::Owned(vec![1, 2, 3]);
let b: Cow<[i32]> = Cow::Borrowed(&[1, 2, 3]);
assert_eq!(Vec::from(o), Vec::from(b));

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

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

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>

Performs the conversion.

impl<'a> From<PercentDecode<'a>> for Cow<'a, [u8]>

pub fn from(iter: PercentDecode<'a>) -> Cow<'a, [u8]>

Performs the conversion.

impl<'a> From<PercentDecode<'a>> for Cow<'a, [u8]>

pub fn from(iter: PercentDecode<'a>) -> Cow<'a, [u8]>

Performs the conversion.

impl<'a, E> From<PercentEncode<'a, E>> for Cow<'a, str> where
    E: EncodeSet, 

pub fn from(iter: PercentEncode<'a, E>) -> Cow<'a, str>

Performs the conversion.

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

pub fn from(iter: PercentEncode<'a>) -> Cow<'a, str>

Performs the conversion.

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]>

Performs the conversion.

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<Cow<'a, str>> for String

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

type Error = &'a RawStr

The associated error to be returned if parsing/validation fails.

pub fn from_param(
    param: &'a RawStr
) -> Result<Cow<'a, str>, <Cow<'a, str> as FromParam<'a>>::Error>

Parses and validates an instance of Self from a path parameter string or returns an Error if parsing or validation fails.

impl<'x, 'a, P> FromUriParam<P, &'x Cow<'a, str>> for Cow<'a, str> where
    P: UriPart, 

type Target = &'x Cow<'a, str>

The resulting type of this conversion.

pub fn from_uri_param(param: &'x Cow<'a, str>) -> &'x Cow<'a, str>

Converts a value of type T into a value of type Self::Target. The resulting value of type Self::Target will be rendered into a URI using its UriDisplay implementation.

impl<'x, 'a, P> FromUriParam<P, &'x mut Cow<'a, str>> for Cow<'a, str> where
    P: UriPart, 

type Target = &'x mut Cow<'a, str>

The resulting type of this conversion.

pub fn from_uri_param(param: &'x mut Cow<'a, str>) -> &'x mut Cow<'a, str>

Converts a value of type T into a value of type Self::Target. The resulting value of type Self::Target will be rendered into a URI using its UriDisplay implementation.

impl<'a, P> FromUriParam<P, Cow<'a, str>> for Cow<'a, str> where
    P: UriPart, 

type Target = Cow<'a, str>

The resulting type of this conversion.

pub fn from_uri_param(param: Cow<'a, str>) -> Cow<'a, str>

Converts a value of type T into a value of type Self::Target. The resulting value of type Self::Target will be rendered into a URI using its UriDisplay implementation.

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.

pub 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<'a, B> IntoOwned for Cow<'a, B> where
    B: 'static + ToOwned + ?Sized, 

type Owned = Cow<'static, B>

The owned version of the type.

pub fn into_owned(self) -> <Cow<'a, B> as IntoOwned>::Owned

Converts self into an owned version of itself.

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.

#[must_use]

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

Compares and returns the maximum of two values.

#[must_use]

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

Compares and returns the minimum of two values.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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> PartialEq<Cow<'a, str>> for String

pub fn eq(&self, other: &Cow<'a, str>) -> bool

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

pub fn ne(&self, other: &Cow<'a, str>) -> bool

This method tests for !=.

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

pub fn eq(&self, other: &Cow<'a, str>) -> bool

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

pub fn ne(&self, other: &Cow<'a, str>) -> bool

This method tests for !=.

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

pub fn eq(&self, other: &Cow<'a, str>) -> bool

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

pub fn ne(&self, other: &Cow<'a, 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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> Replacer for &'a Cow<'a, [u8]>

pub fn replace_append(&mut self, caps: &Captures<'_>, dst: &mut Vec<u8, Global>)

Appends text to dst to replace the current match.

pub fn no_expansion(&mut self) -> Option<Cow<'_, [u8]>>

Return a fixed unchanging replacement byte string.

pub fn by_ref(&'r mut self) -> ReplacerRef<'r, Self>

Return a Replacer that borrows and wraps this Replacer.

impl<'a> Replacer for Cow<'a, [u8]>

pub fn replace_append(&mut self, caps: &Captures<'_>, dst: &mut Vec<u8, Global>)

Appends text to dst to replace the current match.

pub fn no_expansion(&mut self) -> Option<Cow<'_, [u8]>>

Return a fixed unchanging replacement byte string.

pub fn by_ref(&'r mut self) -> ReplacerRef<'r, Self>

Return a Replacer that borrows and wraps this Replacer.

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

pub fn replace_append(&mut self, caps: &Captures<'_>, dst: &mut String)

Appends text to dst to replace the current match.

pub fn no_expansion(&mut self) -> Option<Cow<'_, str>>

Return a fixed unchanging replacement string.

pub fn by_ref(&'r mut self) -> ReplacerRef<'r, Self>

Return a Replacer that borrows and wraps this Replacer.

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

pub fn replace_append(&mut self, caps: &Captures<'_>, dst: &mut String)

Appends text to dst to replace the current match.

pub fn no_expansion(&mut self) -> Option<Cow<'_, str>>

Return a fixed unchanging replacement string.

pub fn by_ref(&'r mut self) -> ReplacerRef<'r, Self>

Return a Replacer that borrows and wraps this Replacer.

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<'a, P> UriDisplay<P> for Cow<'a, str> where
    P: UriPart, 

Percent-encodes the raw string. Defers to str.

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

Formats self in a URI-safe manner using the given formatter.