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

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

    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>`

The resulting type after obtaining ownership.

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## 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();

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## 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);

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## Implementors

### `impl ToOwned for str`[src]

#### `type Owned = String`

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

#### `fn clone_into(&self, target: &mut String)`[src]

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

recently added

### `impl<T> ToOwned for T where
T: Clone,` [src]

#### `type Owned = T`

#### `fn to_owned(&self) -> T`[src]

#### `fn clone_into(&self, target: &mut T)`[src]

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

recently added

### `impl<T: Clone> ToOwned for [T]`[src]

#### `type Owned = Vec<T>`

#### `fn to_owned(&self) -> Vec<T>`[src]

#### `fn clone_into(&self, target: &mut Vec<T>)`[src]

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

recently added

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