pub trait ToOwned { type Owned: Borrow<Self>; fn to_owned(&self) -> Self::Owned; fn clone_into(&self, target: &mut Self::Owned) { ... } }
A generalization of Clone
to borrowed data.
Some types make it possible to go from borrowed to owned, usually by implementing the Clone
trait. But Clone
works only for going from &T
to T
. The ToOwned
trait generalizes Clone
to construct owned data from any borrow of a given type.
fn to_owned(&self) -> Self::Owned
Creates owned data from borrowed data, usually by cloning.
Basic usage:
let s: &str = "a"; let ss: String = s.to_owned(); let v: &[i32] = &[1, 2]; let vv: Vec<i32> = v.to_owned();
fn clone_into(&self, target: &mut Self::Owned)
Uses borrowed data to replace owned data, usually by cloning.
This is borrow-generalized version of Clone::clone_from
.
Basic usage:
let mut s: String = String::new(); "hello".clone_into(&mut s); let mut v: Vec<i32> = Vec::new(); [1, 2][..].clone_into(&mut v);
impl<T> ToOwned for [T] where
    T: Clone, type Owned = Vec<T>;
impl<T> ToOwned for T where
    T: Clone, type Owned = T;
impl ToOwned for str type Owned = String;
impl ToOwned for CStr type Owned = CString;
impl ToOwned for OsStr type Owned = OsString;
impl ToOwned for Path type Owned = PathBuf;
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/borrow/trait.ToOwned.html