Struct rune::alloc::string::FromUtf8Error
source · pub struct FromUtf8Error<A = Global>where
A: Allocator,{ /* private fields */ }
Expand description
A possible error value when converting a String
from a UTF-8 byte vector.
This type is the error type for the from_utf8
method on String
. 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 u8
s 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
use rune::alloc::{try_vec, String};
// some invalid bytes, in a vector
let bytes = try_vec![0, 159];
let value = String::from_utf8(bytes);
assert!(value.is_err());
assert_eq!(try_vec![0, 159], value.unwrap_err().into_bytes());
Implementations§
source§impl<A> FromUtf8Error<A>where
A: Allocator,
impl<A> FromUtf8Error<A>where
A: Allocator,
sourcepub fn into_bytes(self) -> Vec<u8, A> ⓘ
pub fn into_bytes(self) -> Vec<u8, A> ⓘ
Returns the bytes that were attempted to convert to a String
.
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
use rune::alloc::{try_vec, String};
// some invalid bytes, in a vector
let bytes = try_vec![0, 159];
let value = String::from_utf8(bytes);
assert_eq!(try_vec![0, 159], value.unwrap_err().into_bytes());
sourcepub fn utf8_error(&self) -> Utf8Error
pub fn utf8_error(&self) -> Utf8Error
Fetch a Utf8Error
to get more details about the conversion failure.
The Utf8Error
type provided by std::str
represents an error that
may occur when converting a slice of u8
s to a &str
. In this
sense, it’s an analogue to FromUtf8Error
. See its documentation for
more details on using it.
§Examples
use rune::alloc::{try_vec, String};
// some invalid bytes, in a vector
let bytes = try_vec![0, 159];
let error = String::from_utf8(bytes).unwrap_err().utf8_error();
// the first byte is invalid here
assert_eq!(1, error.valid_up_to());
Trait Implementations§
source§impl<A> Debug for FromUtf8Error<A>where
A: Allocator,
impl<A> Debug for FromUtf8Error<A>where
A: Allocator,
source§impl<A> Display for FromUtf8Error<A>where
A: Allocator,
impl<A> Display for FromUtf8Error<A>where
A: Allocator,
source§impl<A> Error for FromUtf8Error<A>where
A: Allocator,
impl<A> Error for FromUtf8Error<A>where
A: Allocator,
1.30.0 · source§fn source(&self) -> Option<&(dyn Error + 'static)>
fn source(&self) -> Option<&(dyn Error + 'static)>
1.0.0 · source§fn description(&self) -> &str
fn description(&self) -> &str
source§impl InstallWith for FromUtf8Error
impl InstallWith for FromUtf8Error
source§fn install_with(module: &mut Module) -> Result<(), ContextError>
fn install_with(module: &mut Module) -> Result<(), ContextError>
source§impl MaybeTypeOf for FromUtf8Error
impl MaybeTypeOf for FromUtf8Error
source§fn maybe_type_of() -> Option<FullTypeOf>
fn maybe_type_of() -> Option<FullTypeOf>
source§impl Named for FromUtf8Error
impl Named for FromUtf8Error
source§impl<A> PartialEq for FromUtf8Error<A>where
A: Allocator,
impl<A> PartialEq for FromUtf8Error<A>where
A: Allocator,
source§fn eq(&self, other: &FromUtf8Error<A>) -> bool
fn eq(&self, other: &FromUtf8Error<A>) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl TypeOf for FromUtf8Error
impl TypeOf for FromUtf8Error
source§impl UnsafeToMut for FromUtf8Error
impl UnsafeToMut for FromUtf8Error
source§impl UnsafeToRef for FromUtf8Error
impl UnsafeToRef for FromUtf8Error
source§impl UnsafeToValue for &FromUtf8Error
impl UnsafeToValue for &FromUtf8Error
§type Guard = SharedPointerGuard
type Guard = SharedPointerGuard
source§impl UnsafeToValue for &mut FromUtf8Error
impl UnsafeToValue for &mut FromUtf8Error
§type Guard = SharedPointerGuard
type Guard = SharedPointerGuard
impl<A> Eq for FromUtf8Error<A>where
A: Allocator,
Auto Trait Implementations§
impl<A> RefUnwindSafe for FromUtf8Error<A>where
A: RefUnwindSafe,
impl<A> Send for FromUtf8Error<A>where
A: Send,
impl<A> Sync for FromUtf8Error<A>where
A: Sync,
impl<A> Unpin for FromUtf8Error<A>where
A: Unpin,
impl<A> UnwindSafe for FromUtf8Error<A>where
A: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.