Function spanned_error 

pub fn spanned_error<T, M: Display>(
    source: &str,
    span: &Spanned<T>,
    message: M,
) -> Report

Create a [miette::Report] pointing at the source span of a Spanned<T> value.

This bridges noyalib’s source-location tracking with miette’s rich terminal diagnostic output, letting users validate deserialized config and report errors that point back to the exact YAML source.

Examples

use noyalib::{from_str, Spanned, diagnostic::spanned_error};

#[derive(serde::Deserialize)]
struct Cfg { port: Spanned<u16> }
let yaml = "port: 80\n";
let cfg: Cfg = from_str(yaml).unwrap();
let report = spanned_error(yaml, &cfg.port, "too low");
assert!(format!("{report}").contains("too low"));