Struct tracing_core::stdlib::ffi::FromVecWithNulError

1.64.0 · source ·
pub struct FromVecWithNulError {
    error_kind: FromBytesWithNulErrorKind,
    bytes: Vec<u8>,
}
Expand description

An error indicating that a nul byte was not in the expected position.

The vector used to create a CString must have one and only one nul byte, positioned at the end.

This error is created by the CString::from_vec_with_nul method. See its documentation for more.

§Examples

use std::ffi::{CString, FromVecWithNulError};

let _: FromVecWithNulError = CString::from_vec_with_nul(b"f\0oo".to_vec()).unwrap_err();

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§error_kind: FromBytesWithNulErrorKind§bytes: Vec<u8>

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1.58.0 · source§

impl FromVecWithNulError

1.58.0 · source

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

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

§Examples

Basic usage:

use std::ffi::CString;

// Some invalid bytes in a vector
let bytes = b"f\0oo".to_vec();

let value = CString::from_vec_with_nul(bytes.clone());

assert_eq!(&bytes[..], value.unwrap_err().as_bytes());
1.58.0 · source

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

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

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 std::ffi::CString;

// Some invalid bytes in a vector
let bytes = b"f\0oo".to_vec();

let value = CString::from_vec_with_nul(bytes.clone());

assert_eq!(bytes, value.unwrap_err().into_bytes());

Trait Implementations§

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impl Clone for FromVecWithNulError

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fn clone(&self) -> FromVecWithNulError

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
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impl Debug for FromVecWithNulError

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

Formats the value using the given formatter. Read more
1.58.0 · source§

impl Display for FromVecWithNulError

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

Formats the value using the given formatter. Read more
1.58.0 · source§

impl Error for FromVecWithNulError

1.30.0 · source§

fn source(&self) -> Option<&(dyn Error + 'static)>

The lower-level source of this error, if any. Read more
1.0.0 · source§

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
1.0.0 · source§

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access #99301)
Provides type based access to context intended for error reports. Read more
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impl PartialEq for FromVecWithNulError

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

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for FromVecWithNulError

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impl StructuralPartialEq for FromVecWithNulError

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.