Enum PartialOp

pub enum PartialOp {
    Limited(usize),
    Unlimited,
    Err(ErrorKind),
}

What to do the next time an IO operation is performed.

This is not the same as io::Result<Option<usize>> because it contains io::ErrorKind instances, not io::Error instances. This allows it to be clonable.

Variants

Limited(usize)

Limit the next IO operation to a certain number of bytes.

The wrapper will call into the inner Read or Write instance. Depending on what the underlying operation does, this may return an error or a fewer number of bytes.

Some methods like Write::flush and AsyncWrite::poll_flush don’t have a limit. For these methods, Limited(n) behaves the same as Unlimited.

Unlimited

Do not limit the next IO operation.

The wrapper will call into the inner Read or Write instance. Depending on what the underlying operation does, this may return an error or a limited number of bytes.

Err(ErrorKind)

Return an error instead of calling into the underlying operation.

For methods on Async traits:

• ErrorKind::WouldBlock is translated to Poll::Pending and the task is scheduled to be woken up in the future.
• ErrorKind::Interrupted causes a retry.

Trait Implementations

impl Arbitrary for PartialOp

Available on crate feature quickcheck1 only.

fn arbitrary(_g: &mut Gen) -> Self

Return an arbitrary value.

fn shrink(&self) -> Box<dyn Iterator<Item = Self>>

Return an iterator of values that are smaller than itself.

impl Clone for PartialOp

fn clone(&self) -> PartialOp

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PartialOp

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

Formats the value using the given formatter.