Struct NoSource 

pub struct NoSource;

An ErrorSource that can be used to represent to lack of any error source. Both its Source and Detail types are (). This can be used for primitive errors that are not caused by any error source.

In practice, it is also possible to omit specifying any error source inside define_error!, which has similar effect as using NoSource but with the source field omitted entirely.

Trait Implementations

impl<Trace> ErrorSource<Trace> for NoSource

type Detail = ()

The type of the error detail that can be extracted from the error source

type Source = ()

The type of the error source.

fn error_details(_: Self::Source) -> (Self::Detail, Option<Trace>)

Extracts the error details out from the error source, together with an optional error trace.