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Add some assertions for #[derive(ToCss)] on enums

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Anthony Ramine 2018-03-06 09:48:58 +01:00
parent 3b31ec36f1
commit f5393cef8d
1 changed files with 5 additions and 0 deletions
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5
components/style_derive/to_css.rs
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@ -15,6 +15,11 @@ pub fn derive(input: syn::DeriveInput) -> Tokens {
cg::trait_parts(&input, &trait_path);
let input_attrs = cg::parse_input_attrs::<CssInputAttrs>(&input);
if let Data::Enum(_) = input.data {
assert!(input_attrs.function.is_none(), "#[css(function)] is not allowed on enums");
assert!(!input_attrs.comma, "#[css(comma)] is not allowed on enums");
assert!(!input_attrs.iterable, "#[css(iterable)] is not allowed on enums");
}
let s = Structure::new(&input);
let match_body = s.each_variant(|variant| {