1.0.0[−][src]Enum af_lib::prelude::af_core::test::prelude::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.
If you need reference-counting pointers, note that
Rc::make_mut
and
Arc::make_mut
can provide clone-on-write
functionality as well.
Examples
use std::borrow::Cow; fn abs_all(input: &mut Cow<[i32]>) { for i in 0..input.len() { let v = input[i]; if v < 0 { // Clones into a vector if not already owned. input.to_mut()[i] = -v; } } } // No clone occurs because `input` doesn't need to be mutated. let slice = [0, 1, 2]; let mut input = Cow::from(&slice[..]); abs_all(&mut input); // Clone occurs because `input` needs to be mutated. let slice = [-1, 0, 1]; let mut input = Cow::from(&slice[..]); abs_all(&mut input); // No clone occurs because `input` is already owned. let mut input = Cow::from(vec![-1, 0, 1]); abs_all(&mut input);
Another example showing how to keep Cow
in a struct:
use std::borrow::Cow; struct Items<'a, X: 'a> where [X]: ToOwned<Owned = Vec<X>> { values: Cow<'a, [X]>, } impl<'a, X: Clone + 'a> Items<'a, X> where [X]: ToOwned<Owned = Vec<X>> { fn new(v: Cow<'a, [X]>) -> Self { Items { values: v } } } // Creates a container from borrowed values of a slice let readonly = [1, 2]; let borrowed = Items::new((&readonly[..]).into()); match borrowed { Items { values: Cow::Borrowed(b) } => println!("borrowed {:?}", b), _ => panic!("expect borrowed value"), } let mut clone_on_write = borrowed; // Mutates the data from slice into owned vec and pushes a new value on top clone_on_write.values.to_mut().push(3); println!("clone_on_write = {:?}", clone_on_write.values); // The data was mutated. Let check it out. match clone_on_write { Items { values: Cow::Owned(_) } => println!("clone_on_write contains owned data"), _ => panic!("expect owned data"), }
Variants
Borrowed(&'a B)
Borrowed data.
Owned data.
Implementations
impl<'_, B> Cow<'_, B> where
B: ToOwned + ?Sized,
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B: ToOwned + ?Sized,
pub const fn is_borrowed(&self) -> bool
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cow_is_borrowed
)Returns true if the data is borrowed, i.e. if to_mut
would require additional work.
Examples
#![feature(cow_is_borrowed)] use std::borrow::Cow; let cow = Cow::Borrowed("moo"); assert!(cow.is_borrowed()); let bull: Cow<'_, str> = Cow::Owned("...moo?".to_string()); assert!(!bull.is_borrowed());
pub const fn is_owned(&self) -> bool
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cow_is_borrowed
)Returns true if the data is owned, i.e. if to_mut
would be a no-op.
Examples
#![feature(cow_is_borrowed)] use std::borrow::Cow; let cow: Cow<'_, str> = Cow::Owned("moo".to_string()); assert!(cow.is_owned()); let bull = Cow::Borrowed("...moo?"); assert!(!bull.is_owned());
pub fn to_mut(&mut self) -> &mut <B as ToOwned>::Owned
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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
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Extracts the owned data.
Clones the data if it is not already owned.
Examples
Calling into_owned
on a Cow::Borrowed
clones the underlying data
and becomes a Cow::Owned
:
use std::borrow::Cow; let s = "Hello world!"; let cow = Cow::Borrowed(s); assert_eq!( cow.into_owned(), String::from(s) );
Calling into_owned
on a Cow::Owned
is a no-op:
use std::borrow::Cow; let s = "Hello world!"; let cow: Cow<str> = Cow::Owned(String::from(s)); assert_eq!( cow.into_owned(), String::from(s) );
Trait Implementations
impl<'a> Add<&'a str> for Cow<'a, str>
1.14.0[src]
type Output = Cow<'a, str>
The resulting type after applying the +
operator.
pub fn add(self, rhs: &'a str) -> <Cow<'a, str> as Add<&'a str>>::Output
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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.
pub fn add(
self,
rhs: Cow<'a, str>
) -> <Cow<'a, str> as Add<Cow<'a, str>>>::Output
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self,
rhs: Cow<'a, str>
) -> <Cow<'a, str> as Add<Cow<'a, str>>>::Output
impl<'a> AddAssign<&'a str> for Cow<'a, str>
1.14.0[src]
pub fn add_assign(&mut self, rhs: &'a str)
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impl<'a> AddAssign<Cow<'a, str>> for Cow<'a, str>
1.14.0[src]
pub fn add_assign(&mut self, rhs: Cow<'a, str>)
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impl<'_> AsRef<Path> for Cow<'_, OsStr>
1.8.0[src]
impl<'_, T> AsRef<T> for Cow<'_, T> where
T: ToOwned + ?Sized,
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T: ToOwned + ?Sized,
pub fn as_ref(&self) -> &TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<'a, B> Borrow<B> for Cow<'a, B> where
B: ToOwned + ?Sized,
<B as ToOwned>::Owned: 'a,
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B: ToOwned + ?Sized,
<B as ToOwned>::Owned: 'a,
pub fn borrow(&self) -> &BⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<'_, B> Clone for Cow<'_, B> where
B: ToOwned + ?Sized,
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B: ToOwned + ?Sized,
impl<'_, B> Debug for Cow<'_, B> where
B: Debug + ToOwned + ?Sized,
<B as ToOwned>::Owned: Debug,
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B: Debug + ToOwned + ?Sized,
<B as ToOwned>::Owned: Debug,
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,
pub fn default() -> Cow<'_, B>
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Creates an owned Cow<'a, B> with the default value for the contained owned value.
impl<'_, B> Deref for Cow<'_, B> where
B: ToOwned + ?Sized,
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B: ToOwned + ?Sized,
type Target = B
The resulting type after dereferencing.
pub fn deref(&self) -> &BⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<'de, 'a, T> Deserialize<'de> for Cow<'a, T> where
T: ToOwned + ?Sized,
<T as ToOwned>::Owned: Deserialize<'de>,
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T: ToOwned + ?Sized,
<T as ToOwned>::Owned: Deserialize<'de>,
pub fn deserialize<D>(
deserializer: D
) -> Result<Cow<'a, T>, <D as Deserializer<'de>>::Error> where
D: Deserializer<'de>,
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deserializer: D
) -> Result<Cow<'a, T>, <D as Deserializer<'de>>::Error> where
D: Deserializer<'de>,
impl<'_, B> Display for Cow<'_, B> where
B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,
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B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,
impl<'_, B> Eq for Cow<'_, B> where
B: Eq + ToOwned + ?Sized,
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B: Eq + ToOwned + ?Sized,
impl<'a> Extend<Cow<'a, str>> for String
1.19.0[src]
pub fn extend<I>(&mut self, iter: I) where
I: IntoIterator<Item = Cow<'a, str>>,
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I: IntoIterator<Item = Cow<'a, str>>,
pub fn extend_one(&mut self, s: Cow<'a, str>)
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pub fn extend_reserve(&mut self, additional: usize)
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impl<'a, A> Extend<Cow<'a, str>> for SmallString<A> where
A: Array<Item = u8>,
A: Array<Item = u8>,
pub fn extend<I>(&mut self, iter: I) where
I: IntoIterator<Item = Cow<'a, str>>,
I: IntoIterator<Item = Cow<'a, str>>,
pub fn extend_one(&mut self, item: A)
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pub fn extend_reserve(&mut self, additional: usize)
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impl<'a, T> From<&'a [T]> for Cow<'a, [T]> where
T: Clone,
1.8.0[src]
T: Clone,
impl<'a> From<&'a CStr> for Cow<'a, CStr>
1.28.0[src]
impl<'a> From<&'a CString> for Cow<'a, CStr>
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 Path> for Cow<'a, Path>
1.6.0[src]
impl<'a> From<&'a PathBuf> for Cow<'a, Path>
1.28.0[src]
impl<'a> From<&'a String> for Cow<'a, str>
1.28.0[src]
impl<'a, T> From<&'a Vec<T, Global>> for Cow<'a, [T]> where
T: Clone,
1.28.0[src]
T: Clone,
impl<'a> From<&'a str> for Cow<'a, str>
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impl<'a> From<CString> for Cow<'a, CStr>
1.28.0[src]
impl<'a, B> From<Cow<'a, B>> for Rc<B> where
B: ToOwned + ?Sized,
Rc<B>: From<&'a B>,
Rc<B>: From<<B as ToOwned>::Owned>,
1.45.0[src]
B: ToOwned + ?Sized,
Rc<B>: From<&'a B>,
Rc<B>: From<<B as ToOwned>::Owned>,
impl<'a, B> From<Cow<'a, B>> for Arc<B> where
B: ToOwned + ?Sized,
Arc<B>: From<&'a B>,
Arc<B>: From<<B as ToOwned>::Owned>,
1.45.0[src]
B: ToOwned + ?Sized,
Arc<B>: From<&'a B>,
Arc<B>: From<<B as ToOwned>::Owned>,
impl<'a> From<Cow<'a, str>> for Value
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pub fn from(f: Cow<'a, str>) -> Value
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Convert copy-on-write string to Value
Examples
use serde_json::Value; use std::borrow::Cow; let s: Cow<str> = Cow::Borrowed("lorem"); let x: Value = s.into();
use serde_json::Value; use std::borrow::Cow; let s: Cow<str> = Cow::Owned("lorem".to_string()); let x: Value = s.into();
impl From<Cow<'static, str>> for SharedString
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pub fn from(value: Cow<'static, str>) -> SharedString
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impl<'key> From<Key<'key>> for Cow<'static, str>
impl<'a> From<OsString> for Cow<'a, OsStr>
1.28.0[src]
impl<'a> From<PathBuf> for Cow<'a, Path>
1.6.0[src]
impl<'a> From<PercentDecode<'a>> for Cow<'a, [u8]>
impl<'a> From<PercentEncode<'a>> for Cow<'a, str>
impl<'a> From<String> for Cow<'a, str>
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impl<'a, T> From<Vec<T, Global>> for Cow<'a, [T]> where
T: Clone,
1.8.0[src]
T: Clone,
impl<'a, 'b> FromIterator<&'b str> for Cow<'a, str>
1.12.0[src]
impl<'a> FromIterator<Cow<'a, str>> for String
1.19.0[src]
impl<'a, A> FromIterator<Cow<'a, str>> for SmallString<A> where
A: Array<Item = u8>,
A: Array<Item = u8>,
pub fn from_iter<I>(iter: I) -> SmallString<A> where
I: IntoIterator<Item = Cow<'a, str>>,
I: IntoIterator<Item = Cow<'a, str>>,
impl<'a> FromIterator<String> for Cow<'a, str>
1.12.0[src]
impl<'a, T> FromIterator<T> for Cow<'a, [T]> where
T: Clone,
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T: Clone,
impl<'a> FromIterator<char> for Cow<'a, str>
1.12.0[src]
impl<'_, B> Hash for Cow<'_, B> where
B: Hash + ToOwned + ?Sized,
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B: Hash + ToOwned + ?Sized,
pub fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
pub fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
impl<'de, 'a, E> IntoDeserializer<'de, E> for Cow<'a, str> where
E: Error,
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E: Error,
type Deserializer = CowStrDeserializer<'a, E>
The type of the deserializer being converted into.
pub fn into_deserializer(self) -> CowStrDeserializer<'a, E>
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impl<'a> IntoDsn for Cow<'a, str>
impl<'_, B> Ord for Cow<'_, B> where
B: Ord + ToOwned + ?Sized,
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B: Ord + ToOwned + ?Sized,
pub fn cmp(&self, other: &Cow<'_, B>) -> Ordering
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#[must_use]pub fn max(self, other: Self) -> Self
1.21.0[src]
#[must_use]pub fn min(self, other: Self) -> Self
1.21.0[src]
#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self
1.50.0[src]
impl<'_, '_, T, U> PartialEq<&'_ [U]> for Cow<'_, [T]> where
T: PartialEq<U> + Clone,
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T: PartialEq<U> + Clone,
impl<'_, '_, T, U> PartialEq<&'_ mut [U]> for Cow<'_, [T]> where
T: PartialEq<U> + Clone,
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T: PartialEq<U> + Clone,
impl<'a, 'b> PartialEq<&'a Path> for Cow<'b, OsStr>
1.8.0[src]
pub fn eq(&self, other: &&'a Path) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, Path>
1.8.0[src]
pub fn eq(&self, other: &&'b OsStr) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<&'b OsStr> for Cow<'a, OsStr>
1.8.0[src]
pub fn eq(&self, other: &&'b OsStr) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<&'b Path> for Cow<'a, Path>
1.6.0[src]
pub fn eq(&self, other: &&'b Path) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<&'b str> for Cow<'a, str>
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impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsStr
1.8.0[src]
pub fn eq(&self, other: &Cow<'a, OsStr>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for Path
1.8.0[src]
pub fn eq(&self, other: &Cow<'a, OsStr>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for &'b OsStr
1.8.0[src]
pub fn eq(&self, other: &Cow<'a, OsStr>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for OsString
1.8.0[src]
pub fn eq(&self, other: &Cow<'a, OsStr>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, OsStr>> for PathBuf
1.8.0[src]
pub fn eq(&self, other: &Cow<'a, OsStr>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b Path
1.6.0[src]
pub fn eq(&self, other: &Cow<'a, Path>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, Path>> for Path
1.6.0[src]
pub fn eq(&self, other: &Cow<'a, Path>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, Path>> for &'b OsStr
1.8.0[src]
pub fn eq(&self, other: &Cow<'a, Path>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, Path>> for OsString
1.8.0[src]
pub fn eq(&self, other: &Cow<'a, Path>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, Path>> for PathBuf
1.6.0[src]
pub fn eq(&self, other: &Cow<'a, Path>) -> bool
[src]
#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, Path>> for OsStr
1.8.0[src]
pub fn eq(&self, other: &Cow<'a, Path>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, str>> for str
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pub fn eq(&self, other: &Cow<'a, str>) -> bool
[src]
pub fn ne(&self, other: &Cow<'a, str>) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, str>> for &'b str
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pub fn eq(&self, other: &Cow<'a, str>) -> bool
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pub fn ne(&self, other: &Cow<'a, str>) -> bool
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impl<'a, 'b> PartialEq<Cow<'a, str>> for String
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pub fn eq(&self, other: &Cow<'a, str>) -> bool
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pub fn ne(&self, other: &Cow<'a, str>) -> bool
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impl<'a, A> PartialEq<Cow<'a, str>> for SmallString<A> where
A: Array<Item = u8>,
A: Array<Item = u8>,
impl<'a, 'b, B, C> PartialEq<Cow<'b, C>> for Cow<'a, B> where
C: ToOwned + ?Sized,
B: PartialEq<C> + ToOwned + ?Sized,
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C: ToOwned + ?Sized,
B: PartialEq<C> + ToOwned + ?Sized,
pub fn eq(&self, other: &Cow<'b, C>) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Cow<'b, OsStr>> for &'a Path
1.8.0[src]
pub fn eq(&self, other: &Cow<'b, OsStr>) -> bool
[src]
#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<OsStr> for Cow<'a, Path>
1.8.0[src]
impl<'a, 'b> PartialEq<OsStr> for Cow<'a, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<OsString> for Cow<'a, Path>
1.8.0[src]
pub fn eq(&self, other: &OsString) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<OsString> for Cow<'a, OsStr>
1.8.0[src]
pub fn eq(&self, other: &OsString) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialEq<Path> for Cow<'a, Path>
1.6.0[src]
impl<'a, 'b> PartialEq<Path> 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<PathBuf> for Cow<'a, OsStr>
1.8.0[src]
impl<'a, 'b> PartialEq<String> for Cow<'a, str>
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impl<'_, T, U, A> PartialEq<Vec<U, A>> for Cow<'_, [T]> where
T: PartialEq<U> + Clone,
A: Allocator,
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T: PartialEq<U> + Clone,
A: Allocator,
impl<'a, 'b> PartialEq<str> for Cow<'a, str>
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impl<'a, 'b> PartialOrd<&'a Path> for Cow<'b, OsStr>
1.8.0[src]
pub fn partial_cmp(&self, other: &&'a Path) -> Option<Ordering>
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#[must_use]pub fn lt(&self, other: &Rhs) -> bool
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#[must_use]pub fn le(&self, other: &Rhs) -> bool
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#[must_use]pub fn gt(&self, other: &Rhs) -> bool
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#[must_use]pub fn ge(&self, other: &Rhs) -> bool
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impl<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, OsStr>
1.8.0[src]
pub fn partial_cmp(&self, other: &&'b OsStr) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<&'b OsStr> for Cow<'a, Path>
1.8.0[src]
pub fn partial_cmp(&self, other: &&'b OsStr) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<&'b Path> for Cow<'a, Path>
1.8.0[src]
pub fn partial_cmp(&self, other: &&'b Path) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, B> PartialOrd<Cow<'a, B>> for Cow<'a, B> where
B: PartialOrd<B> + ToOwned + ?Sized,
[src]
B: PartialOrd<B> + ToOwned + ?Sized,
pub fn partial_cmp(&self, other: &Cow<'a, B>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for OsStr
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for &'b OsStr
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for OsString
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for Path
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, OsStr>> for PathBuf
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, OsStr>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for OsString
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for PathBuf
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for &'b OsStr
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for Path
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for &'b Path
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'a, Path>> for OsStr
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'a, Path>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Cow<'b, OsStr>> for &'a Path
1.8.0[src]
pub fn partial_cmp(&self, other: &Cow<'b, OsStr>) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<OsStr> for Cow<'a, Path>
1.8.0[src]
pub fn partial_cmp(&self, other: &OsStr) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<OsStr> for Cow<'a, OsStr>
1.8.0[src]
pub fn partial_cmp(&self, other: &OsStr) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<OsString> for Cow<'a, OsStr>
1.8.0[src]
pub fn partial_cmp(&self, other: &OsString) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<OsString> for Cow<'a, Path>
1.8.0[src]
pub fn partial_cmp(&self, other: &OsString) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Path> for Cow<'a, OsStr>
1.8.0[src]
pub fn partial_cmp(&self, other: &Path) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<Path> for Cow<'a, Path>
1.8.0[src]
pub fn partial_cmp(&self, other: &Path) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<PathBuf> for Cow<'a, Path>
1.8.0[src]
pub fn partial_cmp(&self, other: &PathBuf) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, 'b> PartialOrd<PathBuf> for Cow<'a, OsStr>
1.8.0[src]
pub fn partial_cmp(&self, other: &PathBuf) -> Option<Ordering>
[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn le(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn gt(&self, other: &Rhs) -> bool
[src]
#[must_use]pub fn ge(&self, other: &Rhs) -> bool
[src]
impl<'a, '_> PathLike<'a> for &'a Cow<'_, str>
[src]
impl<'a> PathLike<'a> for Cow<'a, str>
[src]
impl<'a, T> Serialize for Cow<'a, T> where
T: Serialize + ToOwned + ?Sized,
[src]
T: Serialize + ToOwned + ?Sized,
pub fn serialize<S>(
&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
[src]
&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
impl<'a> ToSql for Cow<'a, str>
[src]
pub fn to_sql(
&self,
ty: &Type,
w: &mut BytesMut
) -> Result<IsNull, Box<dyn Error + 'static + Send + Sync, Global>>
[src]
&self,
ty: &Type,
w: &mut BytesMut
) -> Result<IsNull, Box<dyn Error + 'static + Send + Sync, Global>>
pub fn accepts(ty: &Type) -> bool
[src]
pub fn to_sql_checked(
&self,
ty: &Type,
out: &mut BytesMut
) -> Result<IsNull, Box<dyn Error + 'static + Send + Sync, Global>>
[src]
&self,
ty: &Type,
out: &mut BytesMut
) -> Result<IsNull, Box<dyn Error + 'static + Send + Sync, Global>>
impl<'_> ToString for Cow<'_, str>
1.17.0[src]
Auto Trait Implementations
impl<'a, B: ?Sized> RefUnwindSafe for Cow<'a, B> where
B: RefUnwindSafe,
<B as ToOwned>::Owned: RefUnwindSafe,
[src]
B: RefUnwindSafe,
<B as ToOwned>::Owned: RefUnwindSafe,
impl<'a, B: ?Sized> Send for Cow<'a, B> where
B: Sync,
<B as ToOwned>::Owned: Send,
[src]
B: Sync,
<B as ToOwned>::Owned: Send,
impl<'a, B: ?Sized> Sync for Cow<'a, B> where
B: Sync,
<B as ToOwned>::Owned: Sync,
[src]
B: Sync,
<B as ToOwned>::Owned: Sync,
impl<'a, B: ?Sized> Unpin for Cow<'a, B> where
<B as ToOwned>::Owned: Unpin,
[src]
<B as ToOwned>::Owned: Unpin,
impl<'a, B: ?Sized> UnwindSafe for Cow<'a, B> where
B: RefUnwindSafe,
<B as ToOwned>::Owned: UnwindSafe,
[src]
B: RefUnwindSafe,
<B as ToOwned>::Owned: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
pub fn borrow(&self) -> &TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
[src]
Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
[src]
Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<T> BorrowToSql for T where
T: ToSql,
[src]
T: ToSql,
pub fn borrow_to_sql(&self) -> &dyn ToSql
[src]
impl<T> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
[src]
T: for<'de> Deserialize<'de>,
impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
[src]
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
pub fn equivalent(&self, key: &K) -> bool
[src]
impl<T> From<T> for T
[src]
impl<T> Instrument for T
[src]
pub fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]
Notable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
pub fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]
Notable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
impl<T> Instrument for T
[src]
pub fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]
Notable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
pub fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]
Notable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
impl<T> Same<T> for T
type Output = T
Should always be Self
impl<T> ToOwned for T where
T: Clone,
[src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
[src]
pub fn clone_into(&self, target: &mut T)
[src]
impl<T> ToString for T where
T: Display + ?Sized,
[src]
T: Display + ?Sized,
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.
pub 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.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,