error enum and an owning error type.

[scriptandcompile]

I'm working on trying to integrate error reporting to my VB6 parser.

I've got two types involved with my errors.

VB6ErrorKind which is an enum containing the actual error information specific to the current error:,ie:

#[derive(Error, Debug, Diagnostic)]
pub enum VB6ErrorKind {
    #[error("The reference line has too many elements")]
    ReferenceExtraSections,

    #[error("The reference line has too few elements")]
    ReferenceMissingSections,

   /// blah blah blah, lots of enum variants here.

    #[error("Winnow Error")]
    WinnowParseError,
}

etc, etc, to a frankly a ludicrous number of error variants, growing as my parsing expands. Still, useful and returns exactly what I care about.

Secondly, I have VB6Error which contains everything involved with reporting as far as I can see, ie:

#[derive(Debug, Error, Diagnostic)]
#[error("{kind}")]
#[diagnostic()]
pub struct VB6Error {
    #[source_code]
    pub src: NamedSource<String>,

    #[label]
    pub location: SourceSpan,

    #[diagnostic(transparent)]
    pub kind: VB6ErrorKind,
}

Now this reports the error correctly when I use #[error("{kind}"] - that is the error message on the enum - but for the life of me I can not get my source code to display!

I've got a new method for VB6Error which handles filling out VB6Error (a NamedSource and a SourceSpan with a SourceOffset) but I don't get any snippet.

Just this kind of output (specific to whichever variant is in kind:

Error: × Winnow Error

Any suggestions or help?

I'd also like to get src using &str instead of String, but that's way down on my list of priorities.