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from_utf8

 2 years ago
source link: https://doc.rust-lang.org/stable/std/str/fn.from_utf8_unchecked.html
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Function std::str::from_utf8_unchecked1.0.0 (const: 1.55.0)[−][src]

pub const 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 information.

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:

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);
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