A UTF-8 encoded, growable string.
This module contains the String
type, a trait for converting ToString
s, and several error types that may result from working with String
s.
There are multiple ways to create a new String
from a string literal:
let s = "Hello".to_string(); let s = String::from("world"); let s: String = "also this".into();
You can create a new String
from an existing one by concatenating with +
:
let s = "Hello".to_string(); let message = s + " world!";
If you have a vector of valid UTF-8 bytes, you can make a String
out of it. You can do the reverse too.
let sparkle_heart = vec![240, 159, 146, 150]; // We know these bytes are valid, so we'll use `unwrap()`. let sparkle_heart = String::from_utf8(sparkle_heart).unwrap(); assert_eq!("💖", sparkle_heart); let bytes = sparkle_heart.into_bytes(); assert_eq!(bytes, [240, 159, 146, 150]);
Drain |
A draining iterator for |
FromUtf8Error |
A possible error value when converting a |
FromUtf16Error |
A possible error value when converting a |
String |
A UTF-8 encoded, growable string. |
ToString |
A trait for converting a value to a |
ParseError |
A type alias for |
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/string/index.html