Enum HostPipeError 

pub enum HostPipeError {
    HostNotConnected,
    WriteFailed(Error),
    Serialize(Error),
    BufferOverflow,
}

Reasons send_command / send_event can fail synchronously.

HostNotConnected is reserved for cases where the caller wants to fail-fast instead of buffering (CPD-3 will choose whichever fits per command kind). The default send_command code path buffers; see try_send_command_no_buffer for the fail-fast variant.

Variants

HostNotConnected

No host is currently connected and the caller asked to fail rather than buffer (try_send_command_no_buffer; first caller is the UI-liveness prober, SPEC_LAUNCHER_TEARDOWN_BACKSTOP Phase 1).

WriteFailed(Error)

Underlying write to the pipe failed.

Serialize(Error)

Frame failed to serialize. Should be impossible for well- formed Command / Event variants but kept as a result variant for defense-in-depth.

BufferOverflow

Pending buffer is full and we couldn’t drop the oldest entry to make room (e.g. caller asked for no-overflow semantics). Default send_command does drop-oldest + emit-failed, so callers won’t see this from the public API today.

Trait Implementations

impl Debug for HostPipeError

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

Formats the value using the given formatter.

impl Display for HostPipeError

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

Formats the value using the given formatter.

impl Error for HostPipeError

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.