Struct RenderedNode 

pub struct RenderedNode {
    pub label: String,
    pub output: Option<String>,
    pub diagnostic: Option<String>,
}

One render result for a labelled node, captured during the IR walk so the format-specific serializer can splice it into the final output.

Fields

label: String

Fully-qualified label.

output: Option<String>

Format-shaped string the handler returned (HTML for the HTML pipeline, Markdown for the Markdown pipeline, etc.). None means “fall back to default rendering” — either because the handler said Ok(None) or because it errored / returned a wrong-shape value.

diagnostic: Option<String>

Optional diagnostic the handler produced via Err. Surfaced to the caller alongside the rendered output so they can route it onto whatever channel the host uses (stderr in lexd, publishDiagnostics in lex-lsp).