Is there a way to pull labels from a collection using proc macros?

[KAAtheWiseGit]

Good day!

I have an enum with #[derive(Diagnostic)]. I am trying to add an error type, which can have several spans sourced from a collection:

pub enum ShellError {
    ...
    #[error("{0}")]
    #[diagnostic()]
    GenericError(
        String,
        #[label("{1}")]
        Vec<SourceSpan>,  // a vector with several spans
    ),

Is there a way to achieve this with proc macros?

[zkat]

Not right now, but being able to do this sounds great! :)