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use darling::{FromDeriveInput, FromMeta};
use syn::parse_quote;
#[derive(Default, FromMeta, PartialEq, Debug)]
#[darling(default)]
struct Lorem {
ipsum: bool,
dolor: Option<String>,
}
#[derive(FromDeriveInput, PartialEq, Debug)]
#[darling(attributes(darling_demo))]
struct Core {
ident: syn::Ident,
vis: syn::Visibility,
generics: syn::Generics,
lorem: Lorem,
}
#[derive(FromDeriveInput, PartialEq, Debug)]
#[darling(attributes(darling_demo))]
struct TraitCore {
ident: syn::Ident,
generics: syn::Generics,
lorem: Lorem,
}
#[test]
fn simple() {
let di = parse_quote! {
#[derive(Foo)]
#[darling_demo(lorem(ipsum))]
pub struct Bar;
};
assert_eq!(
Core::from_derive_input(&di).unwrap(),
Core {
ident: parse_quote!(Bar),
vis: parse_quote!(pub),
generics: Default::default(),
lorem: Lorem {
ipsum: true,
dolor: None,
},
}
);
}
#[test]
fn trait_type() {
let di = parse_quote! {
#[derive(Foo)]
#[darling_demo(lorem(dolor = "hello"))]
pub struct Bar;
};
assert_eq!(
TraitCore::from_derive_input(&di).unwrap(),
TraitCore {
ident: parse_quote!(Bar),
generics: Default::default(),
lorem: Lorem {
ipsum: false,
dolor: Some("hello".to_owned()),
}
}
);
}