Enum DependencyError 

#[non_exhaustive]
pub enum DependencyError {
    Cycle {
        chain: Vec<&'static str>,
    },
    NotProvided {
        type_name: &'static str,
    },
}

Failure inside the dependency machinery. Rendered to clients as an opaque 500; the details are logged.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Cycle

A dependency (transitively) depends on itself.

Fields

chain: Vec<&'static str>

Type names along the cycle, starting and ending with the same type.

NotProvided

A value was requested with Provided but never registered.

Fields

type_name: &'static str

The requested type.

Trait Implementations

impl Clone for DependencyError

fn clone(&self) -> DependencyError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DependencyError

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

Formats the value using the given formatter.

impl Display for DependencyError

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

Formats the value using the given formatter.

impl Error for DependencyError

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.