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

# Trait std::borrow::ToOwned 1.0.0[−][src]

    pub trait ToOwned {
        type Owned: Borrow<Self>;
        #[must_use = "cloning is often expensive and is not expected to have side effects"]
    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.

## Associated Types

### `type Owned: Borrow<Self>`

## Required Methods

### `
#[must_use = "cloning is often expensive and is not expected to have side effects"]
fn to_owned(&self) -> Self::Owned`

Creates owned data from borrowed data, usually by cloning.

# Examples

Basic usage:

    let s: &str = "a";
    let ss: String = s.to_owned();

    let v: &[i32] = &[1, 2];
    let vv: Vec<i32> = v.to_owned();Run

## Provided Methods

### `fn clone_into(&self, target: &mut Self::Owned)`

🔬 This is a nightly-only experimental API. (`toowned_clone_into` #41263)

recently added

Uses borrowed data to replace owned data, usually by cloning.

This is borrow-generalized version of `Clone::clone_from`.

# Examples

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);Run

## Implementors

- `impl<T> ToOwned for [T] where T: Clone, type Owned = Vec<T>;` | [src]

- `impl<T> ToOwned for T where T: Clone, type Owned = T;` | [src]

- `impl ToOwned for str type Owned = String;` | [src]

- `impl ToOwned for CStr type Owned = CString;` | [src]

- `impl ToOwned for OsStr type Owned = OsString;` | [src]

- `impl ToOwned for Path type Owned = PathBuf;` | [src]

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