Struct std::io::Error
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pub struct Error {
// some fields omitted
}The error type for I/O operations of the Read, Write, Seek, and
associated traits.
Errors mostly originate from the underlying OS, but custom instances of
Error can be created with crafted error messages and a particular value of
ErrorKind.
Methods
impl Error
fn new<E>(kind: ErrorKind, error: E) -> Error where E: Into<Box<Error + Send + Sync>>
Creates a new I/O error from a known kind of error as well as an arbitrary error payload.
This function is used to generically create I/O errors which do not
originate from the OS itself. The error argument is an arbitrary
payload which will be contained in this Error.
Examples
fn main() { use std::io::{Error, ErrorKind}; // errors can be created from strings let custom_error = Error::new(ErrorKind::Other, "oh no!"); // errors can also be created from other errors let custom_error2 = Error::new(ErrorKind::Interrupted, custom_error); }use std::io::{Error, ErrorKind}; // errors can be created from strings let custom_error = Error::new(ErrorKind::Other, "oh no!"); // errors can also be created from other errors let custom_error2 = Error::new(ErrorKind::Interrupted, custom_error);
fn last_os_error() -> Error
Returns an error representing the last OS error which occurred.
This function reads the value of errno for the target platform (e.g.
GetLastError on Windows) and will return a corresponding instance of
Error for the error code.
fn from_raw_os_error(code: i32) -> Error
Creates a new instance of an Error from a particular OS error code.
fn raw_os_error(&self) -> Option<i32>
Returns the OS error that this error represents (if any).
If this Error was constructed via last_os_error or
from_raw_os_error, then this function will return Some, otherwise
it will return None.
fn get_ref(&self) -> Option<&Error + Send + Sync + 'static>
Returns a reference to the inner error wrapped by this error (if any).
If this Error was constructed via new then this function will
return Some, otherwise it will return None.
fn get_mut(&mut self) -> Option<&mut Error + Send + Sync + 'static>
Returns a mutable reference to the inner error wrapped by this error (if any).
If this Error was constructed via new then this function will
return Some, otherwise it will return None.
fn into_inner(self) -> Option<Box<Error + Send + Sync>>
Consumes the Error, returning its inner error (if any).
If this Error was constructed via new then this function will
return Some, otherwise it will return None.
fn kind(&self) -> ErrorKind
Returns the corresponding ErrorKind for this error.