Render diagnostics without exiting? about miette

[zkat]

Try eprintln!("{:?}", err.into_diagnostic()), iirc

[zmitchell]

That doesn't seem to do the trick. Just to be concrete, let's say I have this type:

#[derive(Debug, Error, Diagnostic)]
#[error("Invalid manifest")]
#[diagnostic(
    code("manifest::parse"),
    url("http://example.com"),
    help("Please check the documentation for the correct format.")
)]
pub struct InvalidManifest {
    #[source_code]
    pub manifest_contents: String,

    #[label = "here"]
    pub span: SourceSpan,
}

If I construct that manually and try printing it with

let err = InvalidManifest {...};
eprintln!("{:?}", err);

I get the debug representation of the InvalidManifest struct. If I print it as

eprintln!("{}", err);

I only see Invalid manifest.

I can also call read_span manually to verify that the span is picking up the correct location of the error.

[zkat]

@zmitchell you're not calling .into_diagnostic(). The graphical printer is on Report's Debug impl, so you first need to turn your error into a Report.

[zmitchell]

I see, I guess I was confused why I needed to call into_diagnostic on something that already impls Diagnostic

[zkat]

Yeah I guess the naming is weird. What it actually does it get you a Report :)