Struct ErrorWithMetadata 

pub struct ErrorWithMetadata {
    pub error: Box<dyn Error + Send + Sync>,
    pub metadata: HashMap<String, String>,
}

Error with additional metadata for better debugging and error tracking.

This structure wraps any error and allows attaching key-value metadata that can be useful for logging, debugging, or displaying detailed error information to users.

Fields

error: Box<dyn Error + Send + Sync>

The underlying error

metadata: HashMap<String, String>

Additional metadata as key-value pairs

Implementations

impl ErrorWithMetadata

pub fn new(error: impl Error + Send + Sync + 'static) -> Self

Create a new error with metadata

pub fn with_metadata( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

Add a metadata entry

pub fn get_metadata(&self, key: &str) -> Option<&str>

Get metadata value by key

Trait Implementations

impl Debug for ErrorWithMetadata

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

Formats the value using the given formatter.

impl Display for ErrorWithMetadata

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

Formats the value using the given formatter.

impl Error for ErrorWithMetadata

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.