#[from]

• impl From generated for each variant that contains a #[from]
• #[from] implies #[source]

Examples

From

#[derive(Error, Debug)]
pub enum MyError {
    Io(#[from] io::Error),
    Glob(#[from] globset::Error),
}

Caveats

• variant with #[from] must not contain any other fields beyond the source error

References

• thiserror