Enum DiError 

pub enum DiError {
    NotFound(&'static str),
    TypeMismatch(&'static str),
    Circular(Vec<&'static str>),
    WrongLifetime(&'static str),
    DepthExceeded(usize),
}

Dependency injection errors

Represents the various error conditions that can occur during service registration, resolution, or container operations in ferrous-di.

Examples

use ferrous_di::{DiError, ServiceCollection, Resolver};

// Example of NotFound error
let provider = ServiceCollection::new().build();
match provider.get::<String>() {
    Err(DiError::NotFound(type_name)) => {
        assert_eq!(type_name, "alloc::string::String");
        println!("Service not found: {}", type_name);
    }
    _ => unreachable!(),
}

use ferrous_di::DiError;

// Examples of error types
let not_found = DiError::NotFound("MyService");
let type_mismatch = DiError::TypeMismatch("std::string::String");
let circular = DiError::Circular(vec!["ServiceA", "ServiceB", "ServiceA"]);
let wrong_lifetime = DiError::WrongLifetime("Cannot resolve scoped from singleton");
let depth_exceeded = DiError::DepthExceeded(100);

// All errors implement Display
println!("Error: {}", not_found);
println!("Error: {}", circular);

Variants

NotFound(&'static str)

Service not registered

TypeMismatch(&'static str)

Type downcast failed

Circular(Vec<&'static str>)

Circular dependency detected (includes path)

WrongLifetime(&'static str)

Invalid lifetime resolution (e.g., scoped from root)

DepthExceeded(usize)

Maximum recursion depth exceeded

Trait Implementations

impl Clone for DiError

fn clone(&self) -> DiError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiError

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

Formats the value using the given formatter.

impl Display for DiError

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

Formats the value using the given formatter.

impl Error for DiError

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.