Enum DependencyError 

pub enum DependencyError {
    NotBound {
        slot: String,
    },
    TypeMismatch {
        slot: String,
        expected: &'static str,
    },
}

Errors surfaced by RuntimeResourceRef::dependency.

In production the dependency is verified at compile time by resolve_component_dependencies, so a runtime miss represents a framework invariant breach (e.g. someone bypassed Node::install to register a custom slot mapping). The error is exposed instead of panicking so test fixtures + introspection tooling can probe the surface without aborting the process.

Variants

NotBound

No component is bound at the requested slot.

Fields

slot: String

The slot name the caller requested.

TypeMismatch

A component IS bound but downcasting to the requested type failed - the slot holds a different concrete than the caller expected.

Fields

slot: String

The slot name the caller requested.

expected: &'static str

std::any::type_name of the expected type.

Trait Implementations

impl Debug for DependencyError

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

Formats the value using the given formatter.

impl Display for DependencyError

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

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.