Enum ResolveError 

#[non_exhaustive]
pub enum ResolveError {
    NotRegistered {
        path: Vec<&'static str>,
    },
    ScopedFromRoot {
        path: Vec<&'static str>,
    },
    Cycle {
        path: Vec<&'static str>,
    },
    Construction {
        path: Vec<&'static str>,
        source: BoxError,
    },
}

Why a service could not be resolved.

Every variant carries the dependency path: type names from the service that was requested down to the one the error is about.

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.

NotRegistered

The last service in path has no registration.

Fields

path: Vec<&'static str>

Dependency path.

ScopedFromRoot

The last service in path is scoped but was requested outside a scope, either from the root provider or by a singleton.

Fields

path: Vec<&'static str>

Dependency path.

Cycle

The services in path depend on each other; the first and last entries are the same service.

Fields

path: Vec<&'static str>

Dependency path.

Construction

The constructor of the last service in path returned an error.

Fields

path: Vec<&'static str>

Dependency path.

source: BoxError

The constructor’s error.

Implementations

impl ResolveError

pub fn path(&self) -> &[&'static str]

The dependency path this error refers to.

Trait Implementations

impl Debug for ResolveError

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

Formats the value using the given formatter.

impl Display for ResolveError

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

Formats the value using the given formatter.

impl Error for ResolveError

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.