std::ffi::NulError - Rust
Description: API documentation for the Rust `NulError` struct in crate `std`.
Keywords: rust, rustlang, rust-lang, NulError

# Struct std::ffi::NulError 1.0.0 [−] [src]

    pub struct NulError(_, _);

An error returned from `CString::new` to indicate that a nul byte was found in the vector provided.

## Methods

### `impl NulError`
[src]

#### `fn nul_position(&self) -> usize`

Returns the position of the nul byte in the slice that was provided to `CString::new`.

# Examples

    use std::ffi::CString;

    let nul_error = CString::new("foo\0bar").unwrap_err();
    assert_eq!(nul_error.nul_position(), 3);

    let nul_error = CString::new("foo bar\0").unwrap_err();
    assert_eq!(nul_error.nul_position(), 7);Run

#### `fn into_vec(self) -> Vec<u8>`

Consumes this error, returning the underlying vector of bytes which generated the error in the first place.

# Examples

    use std::ffi::CString;

    let nul_error = CString::new("foo\0bar").unwrap_err();
    assert_eq!(nul_error.into_vec(), b"foo\0bar");Run

## Trait Implementations

### `impl Clone for NulError`
[src]

#### `fn clone(&self) -> NulError`

Returns a copy of the value. Read more

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

Performs copy-assignment from `source`. Read more

### `impl PartialEq for NulError`
[src]

#### `fn eq(&self, __arg_0: &NulError) -> bool`

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### `fn ne(&self, __arg_0: &NulError) -> bool`

This method tests for `!=`.

### `impl Eq for NulError`
[src]

### `impl Debug for NulError`
[src]

#### `fn fmt(&self, __arg_0: &mut Formatter) -> Result`

Formats the value using the given formatter.

### `impl Error for NulError`
[src]

#### `fn description(&self) -> &str`

A short description of the error. Read more

#### `fn cause(&self) -> Option<&Error>`

The lower-level cause of this error, if any. Read more

### `impl Display for NulError`
[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`

Formats the value using the given formatter.

# Help

## Keyboard Shortcuts

?
  Show this help dialog
S
  Focus the search field
⇤
  Move up in search results
⇥
  Move down in search results
⏎
  Go to active search result
+
  Collapse/expand all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)