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#![feature(proc_macro)]
extern crate syn;
extern crate quote;
extern crate proc_macro;
extern crate proc_macro2;
extern crate wasm_bindgen_backend as backend;
use proc_macro::TokenStream;
use quote::ToTokens;
#[proc_macro_attribute]
pub fn wasm_bindgen(attr: TokenStream, input: TokenStream) -> TokenStream {
let item = syn::parse::<syn::Item>(input.clone()).expect("expected a valid Rust item");
let opts = syn::parse::<backend::ast::BindgenAttrs>(attr)
.expect("invalid arguments to #[wasm_bindgen]");
let mut ret = proc_macro2::TokenStream::empty();
let mut program = backend::ast::Program::default();
program.push_item(item, Some(opts), &mut ret);
program.to_tokens(&mut ret);
ret.into()
}