Enum ReachabilityError 

pub enum ReachabilityError<Key> {
    DifferentRosters(SameRosterRequired),
    RootOutsideRoster {
        root: Key,
    },
}

How a same-roster reachability question refuses before traversal.

Variants

DifferentRosters(SameRosterRequired)

The two relation sides borrow different roster instances.

RootOutsideRoster

The declared root key is outside the shared roster.

Fields

root: Key

The caller-declared root key.

Trait Implementations

impl<Key: Clone> Clone for ReachabilityError<Key>

fn clone(&self) -> ReachabilityError<Key>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Key: Debug> Debug for ReachabilityError<Key>

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

Formats the value using the given formatter.

impl<Key> Display for ReachabilityError<Key>

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

Formats the value using the given formatter.

impl<Key: Eq> Eq for ReachabilityError<Key>

impl<Key: Debug> Error for ReachabilityError<Key>

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.

impl<Key: Hash> Hash for ReachabilityError<Key>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<Key: PartialEq> PartialEq for ReachabilityError<Key>

fn eq(&self, other: &ReachabilityError<Key>) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<Key: PartialEq> StructuralPartialEq for ReachabilityError<Key>