Macro from_attr::convert_parsed_from_meta_list

macro_rules! convert_parsed_from_meta_list {
    ($ty:ty) => { ... };
}

Implement the ConvertParsed<Type = syn::MetaList> trait for the type.

Requires that the type has implemented the FromAttr and AttributeIdent traits.

Generally used for parsing nested attributes.

Example

use from_attr::{FromAttr, convert_parsed_from_meta_list};
use syn::parse_quote;

#[derive(FromAttr, PartialEq, Eq, Debug)]
#[attribute(idents = [inner])]
struct Inner {
    a: usize,
}

convert_parsed_from_meta_list!(Inner);

#[derive(FromAttr, PartialEq, Eq, Debug)]
#[attribute(idents = [outer])]
struct Outer {
    a: usize,
    b: Inner,
}

let attrs = [parse_quote!(#[outer(a = 1, b = inner(a = 10))])];

assert_eq!(
    Outer::from_attributes(&attrs).unwrap().unwrap().value,
    Outer {
        a: 1,
        b: Inner { a: 10 }
    }
);