Struct FromUtf8Error

pub struct FromUtf8Error { /* private fields */ }

A possible error value when converting a FlexibleString from a UTF-8 byte vector.

This type is the error type for the from_utf8 method on FlexibleString. It is designed in such a way to carefully avoid reallocations: the into_bytes method will give back the byte vector that was used in the conversion attempt.

The Utf8Error type provided by std::str represents an error that may occur when converting a slice of u8s to a &str. In this sense, it’s an analogue to FromUtf8Error, and you can get one from a FromUtf8Error through the utf8_error method.

Examples

Basic usage:

use flexible_string::FlexibleString;

// some invalid bytes, in a vector
let bytes = vec![0, 159];

let value = FlexibleString::<200>::from_utf8(bytes);

assert!(value.is_err());
assert_eq!(vec![0, 159], value.unwrap_err().into_bytes());

Implementations

impl FromUtf8Error

pub fn as_bytes(&self) -> &[u8]

Returns a slice of u8s bytes that were attempted to convert to a FlexibleString.

Examples

Basic usage:

use flexible_string::FlexibleString;

// some invalid bytes, in a vector
let bytes = vec![0, 159];

let value = FlexibleString::<200>::from_utf8(bytes);

assert_eq!(&[0, 159], value.unwrap_err().as_bytes());

pub fn into_bytes(self) -> Vec<u8>

Returns the bytes that were attempted to convert to a FlexibleString.

This method is carefully constructed to avoid allocation. It will consume the error, moving out the bytes, so that a copy of the bytes does not need to be made.

Examples

Basic usage:

use flexible_string::FlexibleString;

// some invalid bytes, in a vector
let bytes = vec![0, 159];

let value = FlexibleString::<200>::from_utf8(bytes);

assert_eq!(vec![0, 159], value.unwrap_err().into_bytes());

pub fn utf8_error(&self) -> Utf8Error

Fetch a Utf8Error to get more details about the conversion failure.

The std::str::Utf8Error type represents an error that may occur when converting a slice of u8s to a &str. In this sense, it’s an analogue to FromUtf8Error. See its documentation for more details on using it.

Examples

Basic usage:

use flexible_string::FlexibleString;

// some invalid bytes, in a vector
let bytes = vec![0, 159];

let error = FlexibleString::<200>::from_utf8(bytes).unwrap_err().utf8_error();

// the first byte is invalid here
assert_eq!(1, error.valid_up_to());

Trait Implementations

impl Clone for FromUtf8Error

fn clone(&self) -> FromUtf8Error

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FromUtf8Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for FromUtf8Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<FromUtf8Error> for FromUtf8Error

fn from(std_err: FromUtf8Error) -> Self

Converts to this type from the input type.

impl PartialEq for FromUtf8Error

fn eq(&self, other: &FromUtf8Error) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for FromUtf8Error

impl StructuralPartialEq for FromUtf8Error