Enum FactSourceRegistrationError 

pub enum FactSourceRegistrationError {
    SharedEmptySession {
        fact_name: &'static str,
    },
    AlreadyRegistered {
        fact_name: &'static str,
    },
    InFlight {
        fact_name: &'static str,
    },
}

Error returned by non-panicking fact-source registration helpers.

Variants

SharedEmptySession

The session is the process-wide empty session and cannot accept sources.

Fields

fact_name: &'static str

Diagnostic fact name from FactKey::NAME.

AlreadyRegistered

A source is already registered for this exact fact key type.

Fields

fact_name: &'static str

Diagnostic fact name from FactKey::NAME.

InFlight

Loads for this fact key type are currently in flight.

Fields

fact_name: &'static str

Diagnostic fact name from FactKey::NAME.

Trait Implementations

impl Clone for FactSourceRegistrationError

fn clone(&self) -> FactSourceRegistrationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FactSourceRegistrationError

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

Formats the value using the given formatter.

impl Display for FactSourceRegistrationError

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

Formats the value using the given formatter.

impl Eq for FactSourceRegistrationError

impl Error for FactSourceRegistrationError

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 PartialEq for FactSourceRegistrationError

fn eq(&self, other: &FactSourceRegistrationError) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for FactSourceRegistrationError