1.0.0[−][src]Enum std::borrow::Cow
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);
Another example showing how to keep Cow
in a struct:
use std::borrow::Cow; struct Items<'a, X: 'a> where [X]: ToOwned<Owned = Vec<X>> { values: Cow<'a, [X]>, } impl<'a, X: Clone + 'a> Items<'a, X> where [X]: ToOwned<Owned = Vec<X>> { fn new(v: Cow<'a, [X]>) -> Self { Items { values: v } } } // Creates a container from borrowed values of a slice let readonly = [1, 2]; let borrowed = Items::new((&readonly[..]).into()); match borrowed { Items { values: Cow::Borrowed(b) } => println!("borrowed {:?}", b), _ => panic!("expect borrowed value"), } let mut clone_on_write = borrowed; // Mutates the data from slice into owned vec and pushes a new value on top clone_on_write.values.to_mut().push(3); println!("clone_on_write = {:?}", clone_on_write.values); // The data was mutated. Let check it out. match clone_on_write { Items { values: Cow::Owned(_) } => println!("clone_on_write contains owned data"), _ => panic!("expect owned data"), }
Variants
Borrowed(&'a B)
Borrowed data.
Owned(<B as ToOwned>::Owned)
Owned data.
Methods
impl<'_, B> Cow<'_, B> where
B: ToOwned + ?Sized,
[src]
B: ToOwned + ?Sized,
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> );
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) );
Calling into_owned
on a Cow::Owned
is a no-op:
use std::borrow::Cow; let s = "Hello world!"; let cow: Cow<str> = Cow::Owned(String::from(s)); assert_eq!( cow.into_owned(), String::from(s) );
Trait Implementations
impl<'a> From<Cow<'a, Path>> for PathBuf
1.28.0[src]
impl<'a> From<PathBuf> for Cow<'a, Path>
1.6.0[src]
impl<'a> From<Cow<'a, CStr>> for CString
1.28.0[src]
impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + 'a + Send + Sync>
1.22.0[src]
ⓘImportant traits for Box<W>fn from(err: Cow<'b, str>) -> Box<dyn Error + 'a + Send + Sync>
[src]
Converts a Cow
into a box of dyn Error
+ trait@Send
+ trait@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))
impl<'a> From<&'a PathBuf> for Cow<'a, Path>
1.28.0[src]
impl<'a> From<&'a Path> for Cow<'a, Path>
1.6.0[src]
impl<'a> From<Cow<'a, str>> for Box<dyn Error + 'static>
1.22.0[src]
impl<'a> From<Cow<'a, OsStr>> for OsString
1.28.0[src]
impl<'a> From<CString> for Cow<'a, CStr>
1.28.0[src]
impl<'a> From<&'a CString> for Cow<'a, CStr>
1.28.0[src]
impl<'a> From<OsString> for Cow<'a, OsStr>
1.28.0[src]
impl<'a> From<&'a OsStr> for Cow<'a, OsStr>
1.28.0[src]
impl<'a> From<&'a OsString> for Cow<'a, OsStr>
1.28.0[src]
impl<'a> From<&'a CStr> for Cow<'a, CStr>
1.28.0[src]
impl<'_> AsRef<Path> for Cow<'_, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<OsStr> for Cow<'a, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsString
1.8.0[src]
impl<'a, 'b> PartialEq<&'a Path> for Cow<'b, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<Path> for Cow<'a, Path>
1.6.0[src]
impl<'a, 'b> PartialEq<Cow<'a, Path>> for OsString
1.8.0[src]
impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsStr
1.8.0[src]
impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b Path
1.6.0[src]
impl<'a, 'b> PartialEq<Cow<'a, Path>> for Path
1.6.0[src]
impl<'a, 'b> PartialEq<Cow<'a, Path>> for OsStr
1.8.0[src]
impl<'a, 'b> PartialEq<Cow<'b, OsStr>> for &'a Path
1.8.0[src]
impl<'a, 'b> PartialEq<Path> for Cow<'a, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<OsString> for Cow<'a, Path>
1.8.0[src]
impl<'a, 'b> PartialEq<Cow<'a, Path>> for PathBuf
1.6.0[src]
impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for &'b OsStr
1.8.0[src]
impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, Path>
1.8.0[src]
impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for PathBuf
1.8.0[src]
impl<'a, 'b> PartialEq<OsStr> for Cow<'a, Path>
1.8.0[src]
impl<'a, 'b> PartialEq<OsString> for Cow<'a, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<PathBuf> for Cow<'a, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<PathBuf> for Cow<'a, Path>
1.6.0[src]
impl<'a, 'b> PartialEq<&'b Path> for Cow<'a, Path>
1.6.0[src]
impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b OsStr
1.8.0[src]
impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for Path
1.8.0[src]
impl<'a, 'b> PartialOrd<PathBuf> for Cow<'a, OsStr>
1.8.0[src]
fn partial_cmp(&self, other: &PathBuf) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
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#[must_use]
fn le(&self, other: &Rhs) -> bool
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#[must_use]
fn gt(&self, other: &Rhs) -> bool
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#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, Path>
1.8.0[src]
fn partial_cmp(&self, other: &&'b OsStr) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<PathBuf> for Cow<'a, Path>
1.8.0[src]
fn partial_cmp(&self, other: &PathBuf) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for OsStr
1.8.0[src]
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<OsString> for Cow<'a, Path>
1.8.0[src]
fn partial_cmp(&self, other: &OsString) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for OsStr
1.8.0[src]
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<OsStr> for Cow<'a, OsStr>
1.8.0[src]
fn partial_cmp(&self, other: &OsStr) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
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]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Path> for Cow<'a, Path>
1.8.0[src]
fn partial_cmp(&self, other: &Path) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for OsString
1.8.0[src]
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
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]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for Path
1.8.0[src]
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<&'b Path> for Cow<'a, Path>
1.8.0[src]
fn partial_cmp(&self, other: &&'b Path) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<OsStr> for Cow<'a, Path>
1.8.0[src]
fn partial_cmp(&self, other: &OsStr) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for PathBuf
1.8.0[src]
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<&'a Path> for Cow<'b, OsStr>
1.8.0[src]
fn partial_cmp(&self, other: &&'a Path) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, OsStr>
1.8.0[src]
fn partial_cmp(&self, other: &&'b OsStr) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Path> for Cow<'a, OsStr>
1.8.0[src]
fn partial_cmp(&self, other: &Path) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for OsString
1.8.0[src]
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for Path
1.8.0[src]
fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
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]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
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]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for PathBuf
1.8.0[src]
fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<OsString> for Cow<'a, OsStr>
1.8.0[src]
fn partial_cmp(&self, other: &OsString) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
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]
I: IntoIterator<Item = Cow<'a, str>>,
impl<'a, T> From<Cow<'a, [T]>> for Vec<T> where
[T]: ToOwned,
<[T] as ToOwned>::Owned == Vec<T>,
1.14.0[src]
[T]: ToOwned,
<[T] as ToOwned>::Owned == Vec<T>,
impl<'a> From<String> for Cow<'a, str>
[src]
impl<'a, T> From<&'a [T]> for Cow<'a, [T]> where
T: Clone,
1.8.0[src]
T: Clone,
impl<'a, T> From<&'a Vec<T>> for Cow<'a, [T]> where
T: Clone,
1.28.0[src]
T: Clone,
impl<'a> From<&'a str> for Cow<'a, str>
[src]
impl<'a, T> From<Vec<T>> for Cow<'a, [T]> where
T: Clone,
1.8.0[src]
T: Clone,
impl<'a> From<Cow<'a, str>> for String
1.14.0[src]
impl<'a> From<&'a String> for Cow<'a, str>
1.28.0[src]
impl<'_, B> Eq for Cow<'_, B> where
B: Eq + ToOwned + ?Sized,
[src]
B: Eq + ToOwned + ?Sized,
impl<'_, B> Deref for Cow<'_, B> where
B: ToOwned + ?Sized,
[src]
B: ToOwned + ?Sized,
type Target = B
The resulting type after dereferencing.
ⓘImportant traits for &'_ mut Wfn deref(&self) -> &B
[src]
impl<'_, T> AsRef<T> for Cow<'_, T> where
T: ToOwned + ?Sized,
[src]
T: ToOwned + ?Sized,
impl<'a, 'b> FromIterator<&'b str> for Cow<'a, str>
1.12.0[src]
impl<'a> FromIterator<char> for Cow<'a, str>
1.12.0[src]
impl<'a> FromIterator<Cow<'a, str>> for String
1.19.0[src]
impl<'a> FromIterator<String> for Cow<'a, str>
1.12.0[src]
impl<'a, T> FromIterator<T> for Cow<'a, [T]> where
T: Clone,
[src]
T: Clone,
impl<'_, B> Default for Cow<'_, B> where
B: ToOwned + ?Sized,
<B as ToOwned>::Owned: Default,
1.11.0[src]
B: ToOwned + ?Sized,
<B as ToOwned>::Owned: Default,
fn default() -> Cow<'_, B>
[src]
Creates an owned Cow<'a, B> with the default value for the contained owned value.
impl<'_, A, B> PartialEq<Vec<B>> for Cow<'_, [A]> where
A: PartialEq<B> + Clone,
[src]
A: PartialEq<B> + Clone,
impl<'a, 'b> PartialEq<String> for Cow<'a, str>
[src]
impl<'_, '_, A, B> PartialEq<&'_ mut [B]> for Cow<'_, [A]> where
A: PartialEq<B> + Clone,
[src]
A: PartialEq<B> + Clone,
impl<'a, 'b> PartialEq<&'b str> for Cow<'a, str>
[src]
impl<'a, 'b> PartialEq<str> for Cow<'a, str>
[src]
impl<'a, 'b> PartialEq<Cow<'a, str>> for String
[src]
impl<'a, 'b> PartialEq<Cow<'a, str>> for &'b str
[src]
impl<'a, 'b, B, C> PartialEq<Cow<'b, C>> for Cow<'a, B> where
B: PartialEq<C> + ToOwned + ?Sized,
C: ToOwned + ?Sized,
[src]
B: PartialEq<C> + ToOwned + ?Sized,
C: ToOwned + ?Sized,
impl<'_, '_, A, B> PartialEq<&'_ [B]> for Cow<'_, [A]> where
A: PartialEq<B> + Clone,
[src]
A: PartialEq<B> + Clone,
impl<'a, 'b> PartialEq<Cow<'a, str>> for str
[src]
impl<'_> ToString for Cow<'_, str>
1.17.0[src]
impl<'_, B> Debug for Cow<'_, B> where
B: Debug + ToOwned + ?Sized,
<B as ToOwned>::Owned: Debug,
[src]
B: Debug + ToOwned + ?Sized,
<B as ToOwned>::Owned: Debug,
impl<'a> AddAssign<&'a str> for Cow<'a, str>
1.14.0[src]
fn add_assign(&mut self, rhs: &'a str)
[src]
impl<'a> AddAssign<Cow<'a, str>> for Cow<'a, str>
1.14.0[src]
fn add_assign(&mut self, rhs: Cow<'a, str>)
[src]
impl<'a, B> Borrow<B> for Cow<'a, B> where
B: ToOwned + ?Sized,
<B as ToOwned>::Owned: 'a,
[src]
B: ToOwned + ?Sized,
<B as ToOwned>::Owned: 'a,
impl<'_, B> Clone for Cow<'_, B> where
B: ToOwned + ?Sized,
[src]
B: ToOwned + ?Sized,
impl<'_, B> Ord for Cow<'_, B> where
B: Ord + ToOwned + ?Sized,
[src]
B: Ord + ToOwned + ?Sized,
fn cmp(&self, other: &Cow<'_, B>) -> Ordering
[src]
fn max(self, other: Self) -> Self
1.21.0[src]
fn min(self, other: Self) -> Self
1.21.0[src]
fn clamp(self, min: Self, max: Self) -> Self
[src]
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]
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]
impl<'_, B> Hash for Cow<'_, B> where
B: Hash + ToOwned + ?Sized,
[src]
B: Hash + ToOwned + ?Sized,
fn hash<H>(&self, state: &mut H) where
H: Hasher,
[src]
H: Hasher,
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
impl<'a, B> PartialOrd<Cow<'a, B>> for Cow<'a, B> where
B: PartialOrd<B> + ToOwned + ?Sized,
[src]
B: PartialOrd<B> + ToOwned + ?Sized,
fn partial_cmp(&self, other: &Cow<'a, B>) -> Option<Ordering>
[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
[src]
impl<'_, B> Display for Cow<'_, B> where
B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,
[src]
B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,
Auto Trait Implementations
impl<'a, B: ?Sized> Unpin for Cow<'a, B> where
<B as ToOwned>::Owned: Unpin,
<B as ToOwned>::Owned: Unpin,
impl<'a, B: ?Sized> Sync for Cow<'a, B> where
B: Sync,
<B as ToOwned>::Owned: Sync,
B: Sync,
<B as ToOwned>::Owned: Sync,
impl<'a, B: ?Sized> Send for Cow<'a, B> where
B: Sync,
<B as ToOwned>::Owned: Send,
B: Sync,
<B as ToOwned>::Owned: Send,
impl<'a, B: ?Sized> UnwindSafe for Cow<'a, B> where
B: RefUnwindSafe,
<B as ToOwned>::Owned: UnwindSafe,
B: RefUnwindSafe,
<B as ToOwned>::Owned: UnwindSafe,
impl<'a, B: ?Sized> RefUnwindSafe for Cow<'a, B> where
B: RefUnwindSafe,
<B as ToOwned>::Owned: RefUnwindSafe,
B: RefUnwindSafe,
<B as ToOwned>::Owned: RefUnwindSafe,
Blanket Implementations
impl<T> From<T> for T
[src]
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
[src]
T: Display + ?Sized,
impl<T> ToOwned for T where
T: Clone,
[src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
[src]
fn clone_into(&self, target: &mut T)
[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
[src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
ⓘImportant traits for &'_ mut Wfn borrow_mut(&mut self) -> &mut T
[src]
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,