Struct NeverCancel 

pub struct NeverCancel;

A cancellation signal for operations that cannot be cancelled.

Trait Implementations

impl Cancellation for NeverCancel

fn is_cancelled(&self) -> bool

impl Clone for NeverCancel

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for NeverCancel

impl Debug for NeverCancel

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

Formats the value using the given formatter.

impl Default for NeverCancel

fn default() -> Self

Returns the “default value” for a type.

impl Progress for NeverCancel

Reports nothing and never cancels.

fn format(&mut self, _format: Option<InputFormat>)

The input family, given in the options or detected from the leading signature; None when the input is empty or unrecognized. Called once, before the operation refuses the family or reads past the signature.

fn input_read(&mut self, _done: u64, _total: u64)

The furthest document byte read so far advanced to done of the document’s total bytes. Format engines read their indexes first and then page payloads in order, so this advances with the operation.

fn is_cancelled(&self) -> bool

Whether the caller asked to stop; checked between rows, pages and I/O chunks. A cancelled operation fails with ErrorKind::Cancelled and does not undo bytes already written.