Trait Error

pub trait Error: Error {
    // Required method
    fn help(&self) -> Option<Cow<'_, str>>;

    // Provided method
    fn span(&self) -> Option<ErrSpan> { ... }
}

Unified error interface for all errors in this crate.

Note that the Display implementation is used for a brief message, where as Error::help is used for any clarifying messages.

Required Methods

fn help(&self) -> Option<Cow<'_, str>>

A clarifying message to help aid someone in how to fix the message.

If there is none to add, this can be set to None.

Provided Methods

fn span(&self) -> Option<ErrSpan>

The range where this error occurs in source.

If this is not known, this can be set to None.

Implementors

impl Error for OffsetNewErr

impl Error for LexErr

impl Error for AsmErr

impl Error for ParseErr