Docs4dev
Docs
rust / latest / std / borrow / enum.cow.html

Enum std::borrow::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> 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's 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

source 
impl<B> Cow<'_, B>
where
    B: ToOwned + ?Sized,
const: unstablesource 
pub fn is_borrowed(&self) -> bool
🔬This is a nightly-only experimental API. (cow_is_borrowed #65143)

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());
const: unstablesource 
pub fn is_owned(&self) -> bool
🔬This is a nightly-only experimental API. (cow_is_borrowed #65143)

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());
source 
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>
);
source 
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 returns a clone of the borrowed data:

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 returns the owned data. The data is moved out of the Cow without being cloned.

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

1.14.0source 
impl<'a> Add<&'a str> for Cow<'a, str>
 
type Output = Cow<'a, str>
The resulting type after applying the + operator.
source 
fn add(self, rhs: &'a str) -> <Cow<'a, str> as Add<&'a str>>::Output
Performs the + operation. Read more
1.14.0source 
impl<'a> Add for Cow<'a, str>
 
type Output = Cow<'a, str>
The resulting type after applying the + operator.
source 
fn add(self, rhs: Cow<'a, str>) -> <Cow<'a, str> as Add>::Output
Performs the + operation. Read more
1.14.0source 
impl<'a> AddAssign<&'a str> for Cow<'a, str>
source 
fn add_assign(&mut self, rhs: &'a str)
Performs the += operation. Read more
1.14.0source 
impl<'a> AddAssign for Cow<'a, str>
source 
fn add_assign(&mut self, rhs: Cow<'a, str>)
Performs the += operation. Read more
1.8.0source 
impl AsRef<Path> for Cow<'_, OsStr>
source 
fn as_ref(&self) -> &Path
Converts this type into a shared reference of the (usually inferred) input type.
source 
impl<T> AsRef<T> for Cow<'_, T>
where
    T: ToOwned + ?Sized,
source 
fn as_ref(&self) -> &T
Converts this type into a shared reference of the (usually inferred) input type.
source 
impl<'a, B> Borrow<B> for Cow<'a, B>
where
    B: ToOwned + ?Sized,
source 
fn borrow(&self) -> &B
Immutably borrows from an owned value. Read more
source 
impl<B> Clone for Cow<'_, B>
where
    B: ToOwned + ?Sized,
source 
fn clone(&self) -> Cow<'_, B>
Returns a copy of the value. Read more
source 
fn clone_from(&mut self, source: &Cow<'_, B>)
Performs copy-assignment from source. Read more
source 
impl<B> Debug for Cow<'_, B>
where
    B: Debug + ToOwned + ?Sized,
    <B as ToOwned>::Owned: Debug,
source 
fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>
Formats the value using the given formatter. Read more
1.11.0source 
impl<B> Default for Cow<'_, B>
where
    B: ToOwned + ?Sized,
    <B as ToOwned>::Owned: Default,
source 
fn default() -> Cow<'_, B>

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

source 
impl<B> Deref for Cow<'_, B>
where
    B: ToOwned + ?Sized,
    <B as ToOwned>::Owned: Borrow<B>,
 
type Target = B
The resulting type after dereferencing.
source 
fn deref(&self) -> &B
Dereferences the value.
source 
impl<B> Display for Cow<'_, B>
where
    B: Display + ToOwned + ?Sized,
    <B as ToOwned>::Owned: Display,
source 
fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>
Formats the value using the given formatter. Read more
1.52.0source 
impl<'a> Extend<Cow<'a, OsStr>> for OsString
source 
fn extend<T: IntoIterator<Item = Cow<'a, OsStr>>>(&mut self, iter: T)
Extends a collection with the contents of an iterator. Read more
source 
fn extend_one(&mut self, item: A)
🔬This is a nightly-only experimental API. (extend_one #72631)
Extends a collection with exactly one element.
source 
fn extend_reserve(&mut self, additional: usize)
🔬This is a nightly-only experimental API. (extend_one #72631)
Reserves capacity in a collection for the given number of additional elements. Read more
1.19.0source 
impl<'a> Extend<Cow<'a, str>> for String
source 
fn extend<I>(&mut self, iter: I)
where
    I: IntoIterator<Item = Cow<'a, str>>,
Extends a collection with the contents of an iterator. Read more
source 
fn extend_one(&mut self, s: Cow<'a, str>)
🔬This is a nightly-only experimental API. (extend_one #72631)
Extends a collection with exactly one element.
source 
fn extend_reserve(&mut self, additional: usize)
🔬This is a nightly-only experimental API. (extend_one #72631)
Reserves capacity in a collection for the given number of additional elements. Read more
1.8.0source 
impl<'a, T> From<&'a [T]> for Cow<'a, [T]>
where
    T: Clone,
source 
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.

1.28.0source 
impl<'a> From<&'a CStr> for Cow<'a, CStr>
source 
fn from(s: &'a CStr) -> Cow<'a, CStr>

Converts a CStr into a borrowed Cow without copying or allocating.

1.28.0source 
impl<'a> From<&'a CString> for Cow<'a, CStr>
source 
fn from(s: &'a CString) -> Cow<'a, CStr>

Converts a &CString into a borrowed Cow without copying or allocating.

1.28.0source 
impl<'a> From<&'a OsStr> for Cow<'a, OsStr>
source 
fn from(s: &'a OsStr) -> Cow<'a, OsStr>

Converts the string reference into a Cow::Borrowed.

1.28.0source 
impl<'a> From<&'a OsString> for Cow<'a, OsStr>
source 
fn from(s: &'a OsString) -> Cow<'a, OsStr>

Converts the string reference into a Cow::Borrowed.

1.6.0source 
impl<'a> From<&'a Path> for Cow<'a, Path>
source 
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.

1.28.0source 
impl<'a> From<&'a PathBuf> for Cow<'a, Path>
source 
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.

1.28.0source 
impl<'a> From<&'a String> for Cow<'a, str>
source 
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"));
1.28.0source 
impl<'a, T> From<&'a Vec<T>> for Cow<'a, [T]>
where
    T: Clone,
source 
fn from(v: &'a Vec<T>) -> Cow<'a, [T]>

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

This conversion does not allocate or clone the data.

source 
impl<'a> From<&'a str> for Cow<'a, str>
source 
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"));
1.28.0source 
impl<'a> From<CString> for Cow<'a, CStr>
source 
fn from(s: CString) -> Cow<'a, CStr>

Converts a CString into an owned Cow without copying or allocating.

1.45.0source 
impl<T> From<Cow<'_, [T]>> for Box<[T]>
where
    T: Clone,
source 
fn from(cow: Cow<'_, [T]>) -> Box<[T]>

Converts a Cow<'_, [T]> into a Box<[T]>

When cow is the Cow::Borrowed variant, this conversion allocates on the heap and copies the underlying slice. Otherwise, it will try to reuse the owned Vec’s allocation.

1.45.0source 
impl From<Cow<'_, CStr>> for Box<CStr>
source 
fn from(cow: Cow<'_, CStr>) -> Box<CStr>

Converts a Cow<'a, CStr> into a Box<CStr>, by copying the contents if they are borrowed.

1.45.0source 
impl From<Cow<'_, OsStr>> for Box<OsStr>
source 
fn from(cow: Cow<'_, OsStr>) -> Box<OsStr>

Converts a Cow<'a, OsStr> into a Box<OsStr>, by copying the contents if they are borrowed.

1.45.0source 
impl From<Cow<'_, Path>> for Box<Path>
source 
fn from(cow: Cow<'_, Path>) -> Box<Path>

Creates a boxed Path from a clone-on-write pointer.

Converting from a Cow::Owned does not clone or allocate.

1.45.0source 
impl From<Cow<'_, str>> for Box<str>
source 
fn from(cow: Cow<'_, str>) -> Box<str>

Converts a Cow<'_, str> into a Box<str>

When cow is the Cow::Borrowed variant, this conversion allocates on the heap and copies the underlying str. Otherwise, it will try to reuse the owned String’s allocation.

Examples
use std::borrow::Cow;

let unboxed = Cow::Borrowed("hello");
let boxed: Box<str> = Box::from(unboxed);
println!("{boxed}");
let unboxed = Cow::Owned("hello".to_string());
let boxed: Box<str> = Box::from(unboxed);
println!("{boxed}");
1.14.0source 
impl<'a, T> From<Cow<'a, [T]>> for Vec<T>
where
    [T]: ToOwned<Owned = Vec<T>>,
source 
fn from(s: Cow<'a, [T]>) -> Vec<T>

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));
1.45.0source 
impl<'a, B> From<Cow<'a, B>> for Arc<B>
where
    B: ToOwned + ?Sized,
    Arc<B>: From<&'a B> + From<<B as ToOwned>::Owned>,
source 
fn from(cow: Cow<'a, B>) -> Arc<B>

Create an atomically reference-counted pointer from a clone-on-write pointer by copying its content.

Example
let cow: Cow<'_, str> = Cow::Borrowed("eggplant");
let shared: Arc<str> = Arc::from(cow);
assert_eq!("eggplant", &shared[..]);
1.45.0source 
impl<'a, B> From<Cow<'a, B>> for Rc<B>
where
    B: ToOwned + ?Sized,
    Rc<B>: From<&'a B> + From<<B as ToOwned>::Owned>,
source 
fn from(cow: Cow<'a, B>) -> Rc<B>

Create a reference-counted pointer from a clone-on-write pointer by copying its content.

Example
let cow: Cow<'_, str> = Cow::Borrowed("eggplant");
let shared: Rc<str> = Rc::from(cow);
assert_eq!("eggplant", &shared[..]);
1.28.0source 
impl<'a> From<Cow<'a, CStr>> for CString
source 
fn from(s: Cow<'a, CStr>) -> CString

Converts a Cow<'a, CStr> into a CString, by copying the contents if they are borrowed.

1.28.0source 
impl<'a> From<Cow<'a, OsStr>> for OsString
source 
fn from(s: Cow<'a, OsStr>) -> Self

Converts a Cow<'a, OsStr> into an OsString, by copying the contents if they are borrowed.

1.28.0source 
impl<'a> From<Cow<'a, Path>> for PathBuf
source 
fn from(p: Cow<'a, Path>) -> Self

Converts a clone-on-write pointer to an owned path.

Converting from a Cow::Owned does not clone or allocate.

1.22.0source 
impl<'a> From<Cow<'a, str>> for Box<dyn Error>
source 
fn from(err: Cow<'a, str>) -> Box<dyn Error>

Converts a Cow into a box of dyn Error.

Examples
use std::error::Error;
use std::mem;
use std::borrow::Cow;

let a_cow_str_error = Cow::from("a str error");
let a_boxed_error = Box::<dyn Error>::from(a_cow_str_error);
assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))
1.14.0source 
impl<'a> From<Cow<'a, str>> for String
source 
fn from(s: Cow<'a, str>) -> String

Converts a clone-on-write string to an owned instance of String.

This extracts the owned string, clones the string if it is not already owned.

Example
// If the string is not owned...
let cow: Cow<'_, str> = Cow::Borrowed("eggplant");
// It will allocate on the heap and copy the string.
let owned: String = String::from(cow);
assert_eq!(&owned[..], "eggplant");
1.22.0source 
impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + Send + Sync + 'a>
source 
fn from(err: Cow<'b, str>) -> Box<dyn Error + Send + Sync + 'a>

Converts a Cow into a box of dyn Error + Send + Sync.

Examples
use std::error::Error;
use std::mem;
use std::borrow::Cow;

let a_cow_str_error = Cow::from("a str error");
let a_boxed_error = Box::<dyn Error + Send + Sync>::from(a_cow_str_error);
assert!(
    mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))
1.28.0source 
impl<'a> From<OsString> for Cow<'a, OsStr>
source 
fn from(s: OsString) -> Cow<'a, OsStr>

Moves the string into a Cow::Owned.

1.6.0source 
impl<'a> From<PathBuf> for Cow<'a, Path>
source 
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.

source 
impl<'a> From<String> for Cow<'a, str>
source 
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));
1.8.0source 
impl<'a, T> From<Vec<T>> for Cow<'a, [T]>
where
    T: Clone,
source 
fn from(v: Vec<T>) -> Cow<'a, [T]>

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

This conversion does not allocate or clone the data.

1.12.0source 
impl<'a, 'b> FromIterator<&'b str> for Cow<'a, str>
source 
fn from_iter<I>(it: I) -> Cow<'a, str>
where
    I: IntoIterator<Item = &'b str>,
Creates a value from an iterator. Read more
1.52.0source 
impl<'a> FromIterator<Cow<'a, OsStr>> for OsString
source 
fn from_iter<I: IntoIterator<Item = Cow<'a, OsStr>>>(iter: I) -> Self
Creates a value from an iterator. Read more
1.19.0source 
impl<'a> FromIterator<Cow<'a, str>> for String
source 
fn from_iter<I>(iter: I) -> String
where
    I: IntoIterator<Item = Cow<'a, str>>,
Creates a value from an iterator. Read more
1.12.0source 
impl<'a> FromIterator<String> for Cow<'a, str>
source 
fn from_iter<I>(it: I) -> Cow<'a, str>
where
    I: IntoIterator<Item = String>,
Creates a value from an iterator. Read more
source 
impl<'a, T> FromIterator<T> for Cow<'a, [T]>
where
    T: Clone,
source 
fn from_iter<I>(it: I) -> Cow<'a, [T]>
where
    I: IntoIterator<Item = T>,
Creates a value from an iterator. Read more
1.12.0source 
impl<'a> FromIterator<char> for Cow<'a, str>
source 
fn from_iter<I>(it: I) -> Cow<'a, str>
where
    I: IntoIterator<Item = char>,
Creates a value from an iterator. Read more
source 
impl<B> Hash for Cow<'_, B>
where
    B: Hash + ToOwned + ?Sized,
source 
fn hash<H>(&self, state: &mut H)
where
    H: Hasher,
Feeds this value into the given Hasher. Read more
1.3.0source 
fn hash_slice<H>(data: &[Self], state: &mut H)
where
    H: Hasher,
    Self: Sized,
Feeds a slice of this type into the given Hasher. Read more
source 
impl<B> Ord for Cow<'_, B>
where
    B: Ord + ToOwned + ?Sized,
source 
fn cmp(&self, other: &Cow<'_, B>) -> Ordering
This method returns an Ordering between self and other. Read more
1.21.0source 
fn max(self, other: Self) -> Self
where
    Self: Sized,
Compares and returns the maximum of two values. Read more
1.21.0source 
fn min(self, other: Self) -> Self
where
    Self: Sized,
Compares and returns the minimum of two values. Read more
1.50.0source 
fn clamp(self, min: Self, max: Self) -> Self
where
    Self: Sized + PartialOrd,
Restrict a value to a certain interval. Read more
source 
impl<T, U> PartialEq<&[U]> for Cow<'_, [T]>
where
    T: PartialEq<U> + Clone,
source 
fn eq(&self, other: &&[U]) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &&[U]) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, OsStr>
source 
fn eq(&self, other: &&'b OsStr) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, Path>
source 
fn eq(&self, other: &&'b OsStr) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.6.0source 
impl<'a, 'b> PartialEq<&'b Path> for Cow<'a, Path>
source 
fn eq(&self, other: &&'b Path) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<&'a Path> for Cow<'b, OsStr>
source 
fn eq(&self, other: &&'a Path) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<T, U> PartialEq<&mut [U]> for Cow<'_, [T]>
where
    T: PartialEq<U> + Clone,
source 
fn eq(&self, other: &&mut [U]) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &&mut [U]) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<'a, 'b> PartialEq<&'b str> for Cow<'a, str>
source 
fn eq(&self, other: &&'b str) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &&'b str) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for &'b OsStr
source 
fn eq(&self, other: &Cow<'a, OsStr>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsStr
source 
fn eq(&self, other: &Cow<'a, OsStr>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsString
source 
fn eq(&self, other: &Cow<'a, OsStr>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a> PartialEq<Cow<'a, OsStr>> for Path
source 
fn eq(&self, other: &Cow<'a, OsStr>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a> PartialEq<Cow<'a, OsStr>> for PathBuf
source 
fn eq(&self, other: &Cow<'a, OsStr>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b OsStr
source 
fn eq(&self, other: &Cow<'a, Path>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.6.0source 
impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b Path
source 
fn eq(&self, other: &Cow<'a, Path>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a> PartialEq<Cow<'a, Path>> for OsStr
source 
fn eq(&self, other: &Cow<'a, Path>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a> PartialEq<Cow<'a, Path>> for OsString
source 
fn eq(&self, other: &Cow<'a, Path>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.6.0source 
impl<'a> PartialEq<Cow<'a, Path>> for Path
source 
fn eq(&self, other: &Cow<'a, Path>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.6.0source 
impl<'a> PartialEq<Cow<'a, Path>> for PathBuf
source 
fn eq(&self, other: &Cow<'a, Path>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<'a, 'b> PartialEq<Cow<'a, str>> for &'b str
source 
fn eq(&self, other: &Cow<'a, str>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Cow<'a, str>) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<'a, 'b> PartialEq<Cow<'a, str>> for String
source 
fn eq(&self, other: &Cow<'a, str>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Cow<'a, str>) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<'a, 'b> PartialEq<Cow<'a, str>> for str
source 
fn eq(&self, other: &Cow<'a, str>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Cow<'a, str>) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<'a, 'b, B, C> PartialEq<Cow<'b, C>> for Cow<'a, B>
where
    B: PartialEq<C> + ToOwned + ?Sized,
    C: ToOwned + ?Sized,
source 
fn eq(&self, other: &Cow<'b, C>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<Cow<'b, OsStr>> for &'a Path
source 
fn eq(&self, other: &Cow<'b, OsStr>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<OsStr> for Cow<'a, OsStr>
source 
fn eq(&self, other: &OsStr) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a> PartialEq<OsStr> for Cow<'a, Path>
source 
fn eq(&self, other: &OsStr) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialEq<OsString> for Cow<'a, OsStr>
source 
fn eq(&self, other: &OsString) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a> PartialEq<OsString> for Cow<'a, Path>
source 
fn eq(&self, other: &OsString) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a> PartialEq<Path> for Cow<'a, OsStr>
source 
fn eq(&self, other: &Path) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.6.0source 
impl<'a> PartialEq<Path> for Cow<'a, Path>
source 
fn eq(&self, other: &Path) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a> PartialEq<PathBuf> for Cow<'a, OsStr>
source 
fn eq(&self, other: &PathBuf) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.6.0source 
impl<'a> PartialEq<PathBuf> for Cow<'a, Path>
source 
fn eq(&self, other: &PathBuf) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<'a, 'b> PartialEq<String> for Cow<'a, str>
source 
fn eq(&self, other: &String) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &String) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<T, U, A> PartialEq<Vec<U, A>> for Cow<'_, [T]>
where
    A: Allocator,
    T: PartialEq<U> + Clone,
source 
fn eq(&self, other: &Vec<U, A>) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &Vec<U, A>) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source 
impl<'a, 'b> PartialEq<str> for Cow<'a, str>
source 
fn eq(&self, other: &str) -> bool
This method tests for self and other values to be equal, and is used by ==.
source 
fn ne(&self, other: &str) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.8.0source 
impl<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, OsStr>
source 
fn partial_cmp(&self, other: &&'b OsStr) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, Path>
source 
fn partial_cmp(&self, other: &&'b OsStr) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<&'b Path> for Cow<'a, Path>
source 
fn partial_cmp(&self, other: &&'b Path) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<&'a Path> for Cow<'b, OsStr>
source 
fn partial_cmp(&self, other: &&'a Path) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for &'b OsStr
source 
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for OsStr
source 
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for OsString
source 
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<Cow<'a, OsStr>> for Path
source 
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<Cow<'a, OsStr>> for PathBuf
source 
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for &'b OsStr
source 
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for &'b Path
source 
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<Cow<'a, Path>> for OsStr
source 
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<Cow<'a, Path>> for OsString
source 
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<Cow<'a, Path>> for Path
source 
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<Cow<'a, Path>> for PathBuf
source 
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<Cow<'b, OsStr>> for &'a Path
source 
fn partial_cmp(&self, other: &Cow<'b, OsStr>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<OsStr> for Cow<'a, OsStr>
source 
fn partial_cmp(&self, other: &OsStr) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<OsStr> for Cow<'a, Path>
source 
fn partial_cmp(&self, other: &OsStr) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a, 'b> PartialOrd<OsString> for Cow<'a, OsStr>
source 
fn partial_cmp(&self, other: &OsString) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<OsString> for Cow<'a, Path>
source 
fn partial_cmp(&self, other: &OsString) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<Path> for Cow<'a, OsStr>
source 
fn partial_cmp(&self, other: &Path) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<Path> for Cow<'a, Path>
source 
fn partial_cmp(&self, other: &Path) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<PathBuf> for Cow<'a, OsStr>
source 
fn partial_cmp(&self, other: &PathBuf) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
1.8.0source 
impl<'a> PartialOrd<PathBuf> for Cow<'a, Path>
source 
fn partial_cmp(&self, other: &PathBuf) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source 
impl<'a, B> PartialOrd for Cow<'a, B>
where
    B: PartialOrd + ToOwned + ?Sized,
source 
fn partial_cmp(&self, other: &Cow<'a, B>) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
source 
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
source 
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
source 
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
source 
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
source 
impl<B> Eq for Cow<'_, B>
where
    B: Eq + ToOwned + ?Sized,

Auto Trait Implementations

impl<'a, B: ?Sized> RefUnwindSafe for Cow<'a, B>
where
    B: RefUnwindSafe,
    <B as ToOwned>::Owned: RefUnwindSafe,
impl<'a, B: ?Sized> Send for Cow<'a, B>
where
    B: Sync,
    <B as ToOwned>::Owned: Send,
impl<'a, B: ?Sized> Sync for Cow<'a, B>
where
    B: Sync,
    <B as ToOwned>::Owned: Sync,
impl<'a, B: ?Sized> Unpin for Cow<'a, B>
where
    <B as ToOwned>::Owned: Unpin,
impl<'a, B: ?Sized> UnwindSafe for Cow<'a, B>
where
    B: RefUnwindSafe,
    <B as ToOwned>::Owned: UnwindSafe,

Blanket Implementations

source 
impl<T> Any for T
where
    T: 'static + ?Sized,
source 
fn type_id(&self) -> TypeId
Gets the TypeId of self. Read more
source 
impl<T> Borrow<T> for T
where
    T: ?Sized,
source 
fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
source 
impl<T> BorrowMut<T> for T
where
    T: ?Sized,
source 
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source 
impl<T> From<T> for T
source 
fn from(t: T) -> T

Returns the argument unchanged.

source 
impl<T, U> Into<U> for T
where
    U: From<T>,
source 
fn into(self) -> U

Calls U::from(self).

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

source 
impl<T> ToOwned for T
where
    T: Clone,
 
type Owned = T
The resulting type after obtaining ownership.
source 
fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
source 
fn clone_into(&self, target: &mut T)
Uses borrowed data to replace owned data, usually by cloning. Read more
source 
impl<T> ToString for T
where
    T: Display + ?Sized,
source 
default fn to_string(&self) -> String
Converts the given value to a String. Read more
source 
impl<T, U> TryFrom<U> for T
where
    U: Into<T>,
 
type Error = Infallible
The type returned in the event of a conversion error.
source 
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
source 
impl<T, U> TryInto<U> for T
where
    U: TryFrom<T>,
 
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
source 
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
Performs the conversion.

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/borrow/enum.Cow.html