Struct Unavailable 

pub struct Unavailable { /* private fields */ }

A backend that has no binary to run.

Used when the local surface is switched off, or when discovery found nothing. Every call fails the same way, which keeps the “surface absent” path identical whether the operator disabled it or the machine lacks the binary — and means no caller has to special-case an absent backend.

Implementations

impl Unavailable

pub fn new(reason: impl Into<String>) -> Self

Trait Implementations

impl Clone for Unavailable

fn clone(&self) -> Unavailable

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Unavailable

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

Formats the value using the given formatter.

impl Default for Unavailable

fn default() -> Self

Returns the “default value” for a type.

impl LocalBackend for Unavailable

fn run<'a>( &'a self, _invocation: Invocation, ) -> BoxFuture<'a, Result<Output, ExecError>>