Function core::str::from_utf8_unchecked

pub unsafe fn from_utf8_unchecked(v: &[u8]) -> &str

Converts a slice of bytes to a string slice without checking that the string contains valid UTF-8.

See the safe version, from_utf8(), for more.

Safety

This function is unsafe because it does not check that the bytes passed to it are valid UTF-8. If this constraint is violated, undefined behavior results, as the rest of Rust assumes that &strs are valid UTF-8.

Examples

Basic usage:

fn main() { use std::str; // some bytes, in a vector let sparkle_heart = vec![240, 159, 146, 150]; let sparkle_heart = unsafe { str::from_utf8_unchecked(&sparkle_heart) }; assert_eq!("💖", sparkle_heart); }

use std::str;

// some bytes, in a vector
let sparkle_heart = vec![240, 159, 146, 150];

let sparkle_heart = unsafe {
    str::from_utf8_unchecked(&sparkle_heart)
};

assert_eq!("💖", sparkle_heart);