Struct NoneError 

pub struct NoneError { /* private fields */ }

Error returned when converting Options to an error.

Implementations

impl NoneError

pub fn new() -> Self

Creates a new NoneError error.

Trait Implementations

impl Debug for NoneError

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

Formats the value using the given formatter.

impl Display for NoneError

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

Formats the value using the given formatter.

impl Error for NoneError

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<NoneError> for AnyError

fn from(value: NoneError) -> AnyError

Converts to this type from the input type.

impl StackError for NoneError

fn as_std(&self) -> &(dyn Error + Send + Sync + 'static)

Returns this error as a std error reference.

fn into_std(self: Box<Self>) -> Box<dyn Error + Send + Sync>

Returns this error as a std error.

fn as_dyn(&self) -> &dyn StackError

Returns this error as a dyn StackError.

fn meta(&self) -> Option<&Meta>

Returns metadata captured at creation time, if available.

fn source(&self) -> Option<ErrorRef<'_>>

Returns the next source in the chain, if any.

fn is_transparent(&self) -> bool

Returns whether this error is transparent and should be skipped in reports.

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

Returns the next source in the chain, if any.

fn as_ref(&self) -> ErrorRef<'_>

Returns this error as an ErrorRef.

fn stack(&self) -> Chain<'_>

Returns an iterator over this error followed by its sources.

fn sources(&self) -> Chain<'_>

Returns an iterator over sources of this error (skipping self).

fn report(&self) -> Report<'_>

Returns a Report to output the error with configurable formatting.

impl<T> StackResultExt<T, NoneError> for Option<T>

fn context(self, context: impl Display) -> Result<T, AnyError>

Converts the result’s error value to AnyError while providing additional context.

fn with_context<F, C>(self, context: F) -> Result<T, AnyError>

where F: FnOnce(&NoneError) -> C, C: Display,

Converts the result’s error value to AnyError while providing lazily-evaluated additional context.

impl<T> StdResultExt<T, NoneError> for Option<T>

fn std_context(self, context: impl Display) -> Result<T, AnyError>

Converts the result’s error value to AnyError while providing additional context.

fn with_std_context<F, C>(self, context: F) -> Result<T, AnyError>

where F: FnOnce(&NoneError) -> C, C: Display,

Converts the result’s error value to AnyError while providing lazily-evaluated additional context.

fn anyerr(self) -> Result<T, AnyError>

Converts the result’s error into AnyError.