/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#![feature(proc_macro)]

extern crate proc_macro;

use proc_macro::{TokenStream, quote};

use std::iter;

#[proc_macro_attribute]

pub fn dom_struct(args: TokenStream, input: TokenStream) -> TokenStream {

    if !args.is_empty() {

        panic!("#[dom_struct] takes no arguments");

    }

    let attributes = quote! {

        #[derive(DenyPublicFields, DomObject, JSTraceable, MallocSizeOf)]

        #[must_root]

        #[repr(C)]

    };

    // Work around https://github.com/rust-lang/rust/issues/46489

    let attributes = attributes.to_string().parse().unwrap();

    iter::once(attributes).chain(iter::once(input)).collect()

}