Struct UndeclaredExtension 

#[non_exhaustive]
pub struct UndeclaredExtension {
    pub type_name: &'static str,
}

A request carried an extension of a type its venue does not declare (Extensions::ensure_declared). An InvalidRequest: the caller’s misuse, refused before anything is sent.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

type_name: &'static str

The type the venue does not declare.

Trait Implementations

impl Classify for UndeclaredExtension

fn class(&self) -> Class

The class of this error.

fn is_fault(&self) -> bool

Whether this error is a fault, rather than the venue answering as designed. False only for defined outcomes, such as a Fill-And-Kill order that matched nothing, or a venue that does not serve the caller’s region. Alerting should key on this; retrying should not.

fn retry_after(&self) -> Option<Duration>

How long the server asked the caller to wait. Defaults to the class’s own; an error whose wait outlives its class, such as a ban that says when it lifts, overrides it. Never Some of zero.

fn is_retriable(&self) -> bool

Whether retrying could plausibly succeed, read from the class (see Class::is_retriable).

impl Clone for UndeclaredExtension

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UndeclaredExtension

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

Formats the value using the given formatter.

impl Display for UndeclaredExtension

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

Formats the value using the given formatter.

impl Eq for UndeclaredExtension

impl Error for UndeclaredExtension

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 UndeclaredExtension

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for UndeclaredExtension