Enum Error 

#[non_exhaustive]
pub enum Error {
    Llm {
        message: String,
        source: Option<Box<dyn Error + Send + Sync>>,
    },
    Validation {
        field: Option<String>,
        message: String,
    },
    Io(Error),
    Serialization(Error),
    Timeout {
        seconds: u64,
    },
    MaxRevisionsExceeded {
        attempts: u32,
    },
    Database(Error),
    Config {
        message: String,
    },
    WorkflowNotFound {
        id: String,
    },
    StepNotFound {
        id: String,
    },
}

Errors that can occur during ECL workflow execution.

All error variants are marked with #[non_exhaustive] to allow adding new error types without breaking changes.

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.

Llm

LLM provider error (Claude API failures, rate limits, etc.)

Fields

message: String

Human-readable error message

source: Option<Box<dyn Error + Send + Sync>>

Source error if available

Validation

Step validation error

Fields

field: Option<String>

Field or aspect that failed validation

message: String

What went wrong

Io(Error)

I/O error (file operations, network, etc.)

Serialization(Error)

JSON serialization/deserialization error

Timeout

Step execution timeout

Fields

seconds: u64

Timeout duration in seconds

MaxRevisionsExceeded

Maximum revision iterations exceeded

Fields

attempts: u32

Number of revision attempts made

Database(Error)

Database error

Config

Configuration error

Fields

message: String

What configuration is problematic

WorkflowNotFound

Workflow not found

Fields

id: String

Workflow ID that was not found

StepNotFound

Step not found

Fields

id: String

Step ID that was not found

Implementations

impl Error

pub fn is_retryable(&self) -> bool

Returns whether this error is retryable.

Retryable errors include transient failures like rate limits, network timeouts, and temporary service unavailability.

pub fn llm<S>(message: S) -> Error

where S: Into<String>,

Creates a new LLM error with a message.

pub fn llm_with_source<S, E>(message: S, source: E) -> Error

where S: Into<String>, E: Error + Send + Sync + 'static,

Creates a new LLM error with a message and source error.

pub fn validation<S>(message: S) -> Error

where S: Into<String>,

Creates a new validation error.

pub fn validation_field<F, M>(field: F, message: M) -> Error

where F: Into<String>, M: Into<String>,

Creates a new validation error with a field name.

pub fn config<S>(message: S) -> Error

where S: Into<String>,

Creates a new configuration error.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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 From<Error> for Error

fn from(source: Error) -> Error

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Error

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Error

Converts to this type from the input type.