core::convert::Into - Rust
Description: API documentation for the Rust `Into` trait in crate `core`.
Keywords: rust, rustlang, rust-lang, Into

# Trait core::convert::Into 1.0.0 [−] [src]

    pub trait Into<T>: Sized {
        fn into(self) -> T;
    }

A conversion that consumes `self`, which may or may not be expensive.

Note: this trait must not fail. If the conversion can fail, use `TryInto` or a dedicated method which returns an `Option<T>` or a `Result<T, E>`.

Library authors should not directly implement this trait, but should prefer implementing the `From` trait, which offers greater flexibility and provides an equivalent `Into` implementation for free, thanks to a blanket implementation in the standard library.

# Examples

`String` implements `Into<Vec<u8>>`:

    fn is_hello<T: Into<Vec<u8>>>(s: T) {
       let bytes = b"hello".to_vec();
       assert_eq!(bytes, s.into());
    }

    let s = "hello".to_string();
    is_hello(s);Run

# Generic Impls

- `From<T>``for U` implies `Into<U> for T`
- `into()` is reflexive, which means that `Into<T> for T` is implemented

## Required Methods

### `fn into(self) -> T`

Performs the conversion.

## Implementors

- `impl<T, U> Into<U> for T where U: From<T>`

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