Struct core::str::Utf8Error
[−]
[src]
pub struct Utf8Error {
// some fields omitted
}Errors which can occur when attempting to interpret a sequence of u8
as a string.
As such, the from_utf8 family of functions and methods for both Strings
and &strs make use of this error, for example.
Methods
impl Utf8Error
fn valid_up_to(&self) -> usize
Returns the index in the given string up to which valid UTF-8 was verified.
It is the maximum index such that from_utf8(input[..index])
would return Some(_).
Examples
Basic usage:
fn main() { use std::str; // some invalid bytes, in a vector let sparkle_heart = vec![0, 159, 146, 150]; // std::str::from_utf8 returns a Utf8Error let error = str::from_utf8(&sparkle_heart).unwrap_err(); // the first byte is invalid here assert_eq!(1, error.valid_up_to()); }use std::str; // some invalid bytes, in a vector let sparkle_heart = vec![0, 159, 146, 150]; // std::str::from_utf8 returns a Utf8Error let error = str::from_utf8(&sparkle_heart).unwrap_err(); // the first byte is invalid here assert_eq!(1, error.valid_up_to());