std::borrow::Cow - Rust
Description: API documentation for the Rust `Cow` enum in crate `std`.
Keywords: rust, rustlang, rust-lang, Cow

# Enum std::borrow::Cow 1.0.0 [−] [src]

    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.

# 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);Run

## Variants

`Borrowed(&'a B)`

Borrowed data.

`Owned(<B as ToOwned>::Owned)`

Owned data.

## Methods

### `impl<'a, B> Cow<'a, B> where
B: ToOwned + ?Sized,`
[src]

#### `pub fn to_mut(&mut self) -> &mut <B as ToOwned>::Owned`
[src]

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>
    );Run

#### `pub fn into_owned(self) -> <B as ToOwned>::Owned`
[src]

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)
    );Run

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)
    );Run

## Trait Implementations

### `impl<'a, T> From<Vec<T>> for Cow<'a, [T]> where
T: Clone,`
1.8.0
[src]

#### `fn from(v: Vec<T>) -> Cow<'a, [T]>`
[src]

Performs the conversion.

### `impl<'a, T> From<&'a [T]> for Cow<'a, [T]> where
T: Clone,`
1.8.0
[src]

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

Performs the conversion.

### `impl<'a> From<&'a str> for Cow<'a, str>`
[src]

#### `fn from(s: &'a str) -> Cow<'a, str>`
[src]

Performs the conversion.

### `impl<'a, T> From<Cow<'a, [T]>> for Vec<T> where
[T]: ToOwned,
<[T] as ToOwned>::Owned == Vec<T>,`
1.14.0
[src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(s: Cow<'a, [T]>) -> Vec<T>`
[src]

Performs the conversion.

### `impl<'a> From<String> for Cow<'a, str>`
[src]

#### `fn from(s: String) -> Cow<'a, str>`
[src]

Performs the conversion.

### `impl<'a> From<Cow<'a, str>> for String`
1.14.0
[src]

#### `fn from(s: Cow<'a, str>) -> String`
[src]

Performs the conversion.

### `impl<'a, 'b> FromIterator<&'b str> for Cow<'a, str>`
1.12.0
[src]

#### `fn from_iter<I>(it: I) -> Cow<'a, str> where
I: IntoIterator<Item = &'b str>,`
[src]

Creates a value from an iterator. Read more

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

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

Creates a value from an iterator. Read more

### `impl<'a> FromIterator<char> for Cow<'a, str>`
1.12.0
[src]

#### `fn from_iter<I>(it: I) -> Cow<'a, str> where
I: IntoIterator<Item = char>,`
[src]

Creates a value from an iterator. Read more

### `impl<'a> FromIterator<String> for Cow<'a, str>`
1.12.0
[src]

#### `fn from_iter<I>(it: I) -> Cow<'a, str> where
I: IntoIterator<Item = String>,`
[src]

Creates a value from an iterator. Read more

### `impl<'a> FromIterator<Cow<'a, str>> for String`
1.19.0
[src]

#### `fn from_iter<I>(iter: I) -> String where
I: IntoIterator<Item = Cow<'a, str>>,`
[src]

Creates a value from an iterator. Read more

### `impl<'a> ToString for Cow<'a, str>`
1.17.0
[src]

#### `fn to_string(&self) -> String`
[src]

Converts the given value to a `String`. Read more

### `impl<'a, B> PartialOrd<Cow<'a, B>> for Cow<'a, B> where
B: PartialOrd<B> + ToOwned + ?Sized,`
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, B>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, B> Debug for Cow<'a, B> where
B: Debug + ToOwned + ?Sized,
<B as ToOwned>::Owned: Debug,`
[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`
[src]

Formats the value using the given formatter. Read more

### `impl<'a> Add<&'a str> for Cow<'a, str>`
1.14.0
[src]

#### `type Output = Cow<'a, str>`

The resulting type after applying the `+` operator.

#### `fn add(self, rhs: &'a str) -> <Cow<'a, str> as Add<&'a str>>::Output`
[src]

Performs the `+` operation.

### `impl<'a> Add<Cow<'a, str>> for Cow<'a, str>`
1.14.0
[src]

#### `type Output = Cow<'a, str>`

The resulting type after applying the `+` operator.

#### `fn add(self, rhs: Cow<'a, str>) -> <Cow<'a, str> as Add<Cow<'a, str>>>::Output`
[src]

Performs the `+` operation.

### `impl<'a, 'b> PartialEq<Cow<'a, str>> for &'b str`
[src]

#### `fn eq(&self, other: &Cow<'a, str>) -> bool`
[src]

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

#### `fn ne(&self, other: &Cow<'a, str>) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<String> for Cow<'a, str>`
[src]

#### `fn eq(&self, other: &String) -> bool`
[src]

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

#### `fn ne(&self, other: &String) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<&'b str> for Cow<'a, str>`
[src]

#### `fn eq(&self, other: &&'b str) -> bool`
[src]

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

#### `fn ne(&self, other: &&'b str) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b, A, B> PartialEq<Vec<B>> for Cow<'a, [A]> where
A: Clone + PartialEq<B>,`
[src]

#### `fn eq(&self, other: &Vec<B>) -> bool`
[src]

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

#### `fn ne(&self, other: &Vec<B>) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b, A, B> PartialEq<&'b mut [B]> for Cow<'a, [A]> where
A: Clone + PartialEq<B>,`
[src]

#### `fn eq(&self, other: &&'b mut [B]) -> bool`
[src]

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

#### `fn ne(&self, other: &&'b mut [B]) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b, B, C> PartialEq<Cow<'b, C>> for Cow<'a, B> where
B: PartialEq<C> + ToOwned + ?Sized,
C: ToOwned + ?Sized,`
[src]

#### `fn eq(&self, other: &Cow<'b, C>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, str>> for String`
[src]

#### `fn eq(&self, other: &Cow<'a, str>) -> bool`
[src]

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

#### `fn ne(&self, other: &Cow<'a, str>) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, str>> for str`
[src]

#### `fn eq(&self, other: &Cow<'a, str>) -> bool`
[src]

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

#### `fn ne(&self, other: &Cow<'a, str>) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<str> for Cow<'a, str>`
[src]

#### `fn eq(&self, other: &str) -> bool`
[src]

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

#### `fn ne(&self, other: &str) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b, A, B> PartialEq<&'b [B]> for Cow<'a, [A]> where
A: Clone + PartialEq<B>,`
[src]

#### `fn eq(&self, other: &&'b [B]) -> bool`
[src]

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

#### `fn ne(&self, other: &&'b [B]) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, B> Default for Cow<'a, B> where
B: ToOwned + ?Sized,
<B as ToOwned>::Owned: Default,`
1.11.0
[src]

#### `fn default() -> Cow<'a, B>`
[src]

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

### `impl<'a, B> Hash for Cow<'a, B> where
B: Hash + ToOwned + ?Sized,`
[src]

#### `fn hash<H>(&self, state: &mut H) where
H: Hasher,`
[src]

Feeds this value into the given [`Hasher`]. Read more

#### `fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,`
1.3.0
[src]

Feeds a slice of this type into the given [`Hasher`]. Read more

### `impl<'a> AddAssign<Cow<'a, str>> for Cow<'a, str>`
1.14.0
[src]

#### `fn add_assign(&mut self, rhs: Cow<'a, str>)`
[src]

Performs the `+=` operation.

### `impl<'a> AddAssign<&'a str> for Cow<'a, str>`
1.14.0
[src]

#### `fn add_assign(&mut self, rhs: &'a str)`
[src]

Performs the `+=` operation.

### `impl<'a, B> Borrow<B> for Cow<'a, B> where
B: ToOwned + ?Sized,
<B as ToOwned>::Owned: 'a,`
[src]

####
ⓘImportant traits for &'a mut I

### Important traits for &'a mut I

`impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`
`fn borrow(&self) -> &B`
[src]

Immutably borrows from an owned value. Read more

### `impl<'a> Extend<Cow<'a, str>> for String`
1.19.0
[src]

#### `fn extend<I>(&mut self, iter: I) where
I: IntoIterator<Item = Cow<'a, str>>,`
[src]

Extends a collection with the contents of an iterator. Read more

### `impl<'a, T> AsRef<T> for Cow<'a, T> where
T: ToOwned + ?Sized,`
[src]

####
ⓘImportant traits for &'a mut I

### Important traits for &'a mut I

`impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`
`fn as_ref(&self) -> &T`
[src]

Performs the conversion.

### `impl<'a, B> Deref for Cow<'a, B> where
B: ToOwned + ?Sized,`
[src]

#### `type Target = B`

The resulting type after dereferencing.

####
ⓘImportant traits for &'a mut I

### Important traits for &'a mut I

`impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`
`fn deref(&self) -> &B`
[src]

Dereferences the value.

### `impl<'a, B> Clone for Cow<'a, B> where
B: ToOwned + ?Sized,`
[src]

#### `fn clone(&self) -> Cow<'a, B>`
[src]

Returns a copy of the value. Read more

#### `fn clone_from(&mut self, source: &Cow<'a, B>)`
[src]

Performs copy-assignment from `source`. Read more

### `impl<'a, B> Eq for Cow<'a, B> where
B: Eq + ToOwned + ?Sized,`
[src]

### `impl<'a, B> Display for Cow<'a, B> where
B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,`
[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`
[src]

Formats the value using the given formatter. Read more

### `impl<'a, B> Ord for Cow<'a, B> where
B: Ord + ToOwned + ?Sized,`
[src]

#### `fn cmp(&self, other: &Cow<'a, B>) -> Ordering`
[src]

This method returns an `Ordering` between `self` and `other`. Read more

#### `fn max(self, other: Self) -> Self`
1.21.0
[src]

Compares and returns the maximum of two values. Read more

#### `fn min(self, other: Self) -> Self`
1.21.0
[src]

Compares and returns the minimum of two values. Read more

### `impl<'a, 'b> From<Cow<'b, str>> for Box<Error + Send + Sync + 'a>`
1.22.0
[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: Cow<'b, str>) -> Box<Error + Send + Sync + 'a>`
[src]

Performs the conversion.

### `impl<'a> From<Cow<'a, str>> for Box<Error>`
1.22.0
[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: Cow<'a, str>) -> Box<Error>`
[src]

Performs the conversion.

### `impl<'a, 'b> PartialEq<OsStr> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn eq(&self, other: &OsStr) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsStr`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'a, OsStr>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<OsStr> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &OsStr) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for OsStr`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn eq(&self, other: &&'b OsStr) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for &'b OsStr`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'a, OsStr>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &&'b OsStr) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for &'b OsStr`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<OsString> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn eq(&self, other: &OsString) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsString`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'a, OsStr>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<OsString> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &OsString) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for OsString`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a> From<&'a Path> for Cow<'a, Path>`
1.6.0
[src]

#### `fn from(s: &'a Path) -> Cow<'a, Path>`
[src]

Performs the conversion.

### `impl<'a> From<PathBuf> for Cow<'a, Path>`
1.6.0
[src]

#### `fn from(s: PathBuf) -> Cow<'a, Path>`
[src]

Performs the conversion.

### `impl<'a> AsRef<Path> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn as_ref(&self) -> &Path`
[src]

Performs the conversion.

### `impl<'a, 'b> PartialEq<Path> for Cow<'a, Path>`
1.6.0
[src]

#### `fn eq(&self, other: &Path) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, Path>> for Path`
1.6.0
[src]

#### `fn eq(&self, other: &Cow<'a, Path>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<Path> for Cow<'a, Path>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Path) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, Path>> for Path`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<&'b Path> for Cow<'a, Path>`
1.6.0
[src]

#### `fn eq(&self, other: &&'b Path) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b Path`
1.6.0
[src]

#### `fn eq(&self, other: &Cow<'a, Path>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<&'b Path> for Cow<'a, Path>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &&'b Path) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, Path>> for &'b Path`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<PathBuf> for Cow<'a, Path>`
1.6.0
[src]

#### `fn eq(&self, other: &PathBuf) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, Path>> for PathBuf`
1.6.0
[src]

#### `fn eq(&self, other: &Cow<'a, Path>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<PathBuf> for Cow<'a, Path>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &PathBuf) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, Path>> for PathBuf`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for PathBuf`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'a, OsStr>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<PathBuf> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn eq(&self, other: &PathBuf) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for PathBuf`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<PathBuf> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &PathBuf) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for Path`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'a, OsStr>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Path> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn eq(&self, other: &Path) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for Path`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Path> for Cow<'a, OsStr>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Path) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<Cow<'b, OsStr>> for &'a Path`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'b, OsStr>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<&'a Path> for Cow<'b, OsStr>`
1.8.0
[src]

#### `fn eq(&self, other: &&'a Path) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<Cow<'b, OsStr>> for &'a Path`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'b, OsStr>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<&'a Path> for Cow<'b, OsStr>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &&'a Path) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<OsStr> for Cow<'a, Path>`
1.8.0
[src]

#### `fn eq(&self, other: &OsStr) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, Path>> for OsStr`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'a, Path>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<OsStr> for Cow<'a, Path>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &OsStr) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, Path>> for OsStr`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, Path>`
1.8.0
[src]

#### `fn eq(&self, other: &&'b OsStr) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b OsStr`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'a, Path>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, Path>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &&'b OsStr) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, Path>> for &'b OsStr`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialEq<OsString> for Cow<'a, Path>`
1.8.0
[src]

#### `fn eq(&self, other: &OsString) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialEq<Cow<'a, Path>> for OsString`
1.8.0
[src]

#### `fn eq(&self, other: &Cow<'a, Path>) -> bool`
[src]

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

#### `fn ne(&self, other: &Rhs) -> bool`
[src]

This method tests for `!=`.

### `impl<'a, 'b> PartialOrd<OsString> for Cow<'a, Path>`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &OsString) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl<'a, 'b> PartialOrd<Cow<'a, Path>> for OsString`
1.8.0
[src]

#### `fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>`
[src]

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

#### `fn lt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn le(&self, other: &Rhs) -> bool`
[src]

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

#### `fn gt(&self, other: &Rhs) -> bool`
[src]

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

#### `fn ge(&self, other: &Rhs) -> bool`
[src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

# Help

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## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)