Struct std::str::Utf8Error 1.0.0
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pub struct Utf8Error { /* 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[src]
fn valid_up_to(&self) -> usize1.5.0[src]
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 Ok(_).
Examples
Basic usage:
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 second byte is invalid here assert_eq!(1, error.valid_up_to());Run
fn error_len(&self) -> Option<usize>1.20.0[src]
Provide more information about the failure:
None: the end of the input was reached unexpectedly.self.valid_up_to()is 1 to 3 bytes from the end of the input. If a byte stream (such as a file or a network socket) is being decoded incrementally, this could be a validcharwhose UTF-8 byte sequence is spanning multiple chunks.Some(len): an unexpected byte was encountered. The length provided is that of the invalid byte sequence that starts at the index given byvalid_up_to(). Decoding should resume after that sequence (after inserting a U+FFFD REPLACEMENT CHARACTER) in case of lossy decoding.
Trait Implementations
impl Clone for Utf8Error[src]
fn clone(&self) -> Utf8Error[src]
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)[src]
Performs copy-assignment from source. Read more
impl PartialEq<Utf8Error> for Utf8Error[src]
fn eq(&self, __arg_0: &Utf8Error) -> bool[src]
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, __arg_0: &Utf8Error) -> bool[src]
This method tests for !=.
impl Display for Utf8Error[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
Formats the value using the given formatter. Read more
impl Copy for Utf8Error[src]
impl Debug for Utf8Error[src]
fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>[src]
Formats the value using the given formatter. Read more