Struct StringTracer

pub struct StringTracer(pub String);

A naive string tracer serializes error messages into string and simply concatenate them together. This can be used for example in no_std environment, which may not support more complex error tracers.

Tuple Fields

0: String

Trait Implementations

impl Debug for StringTracer

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

Formats the value using the given formatter.

impl Display for StringTracer

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

Formats the value using the given formatter.

impl ErrorMessageTracer for StringTracer

fn new_message<E: Display>(err: &E) -> Self

Creates a new error trace, starting from a source error detail that implements Display.

fn add_message<E: Display>(self, err: &E) -> Self

Adds new error detail to an existing trace.

fn as_error(&self) -> Option<&(dyn Error + 'static)>

If the std feature is enabled, the error tracer also provides method to optionally converts itself to a dyn Error.

impl<E: Display> ErrorTracer<E> for StringTracer

fn new_trace(err: E) -> Self

Create a new error trace from E, also taking ownership of it.

fn add_trace(self, err: E) -> Self

Add a new error trace from E. In the current underlying implementation, this is effectively still has the same behavior as ErrorMessageTracer::add_message. This is because eyre and anyhow do not support adding new set of backtraces to an existing trace. So effectively, currently the error tracers can track at most one backtrace coming from the original error source.