fn extract_outer_doc()

in avro_derive/src/lib.rs [327:351]

• 25 lines of code
• 3 McCabe index (conditional complexity)

fn extract_outer_doc(attributes: &[Attribute]) -> Option<String> {
    let doc = attributes
        .iter()
        .filter(|attr| attr.style == AttrStyle::Outer && attr.path().is_ident("doc"))
        .filter_map(|attr| {
            let name_value = attr.meta.require_name_value();
            match name_value {
                Ok(name_value) => match &name_value.value {
                    syn::Expr::Lit(expr_lit) => match expr_lit.lit {
                        syn::Lit::Str(ref lit_str) => Some(lit_str.value().trim().to_string()),
                        _ => None,
                    },
                    _ => None,
                },
                Err(_) => None,
            }
        })
        .collect::<Vec<String>>()
        .join("\n");
    if doc.is_empty() {
        None
    } else {
        Some(doc)
    }
}