Enum TokenCacheError 

#[non_exhaustive]
pub enum TokenCacheError {
    Fetch(String),
    Malformed(String),
    Source(Box<dyn Error + Send + Sync>),
}

Errors returned by TokenCache and TokenSource implementations.

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.

Fetch(String)

Malformed(String)

Source(Box<dyn Error + Send + Sync>)

A source-specific failure, preserved intact for the SDK layer that installed the source. A custom TokenSource wraps its own typed error here instead of flattening it to a string, so the SDK facade can downcast back to its native error type (e.g. distinguish “not authenticated — no durable credential” from a transport failure) after the error has passed through the cache.

Trait Implementations

impl Debug for TokenCacheError

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

Formats the value using the given formatter.

impl Display for TokenCacheError

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

Formats the value using the given formatter.

impl Error for TokenCacheError

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<TokenCacheError> for Error

fn from(source: TokenCacheError) -> Self

Converts to this type from the input type.