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//! Elvis derive macros
#![warn(missing_docs)]
extern crate proc_macro;

use proc_macro::TokenStream;
use quote::quote;
use syn::{parse_macro_input, DeriveInput};

/// Basic elvis attr macro
#[proc_macro_attribute]
pub fn elvis(_attr: TokenStream, item: TokenStream) -> TokenStream {
    let item = parse_macro_input!(item as DeriveInput);
    let ident = item.ident.clone();

    let expanded = quote! {
        #item

        /// Run APP
        #[wasm_bindgen(start)]
        pub fn run() {
            let mut widget = Widget::new(#ident.create());
            widget.calling().unwrap();
        }
    };

    TokenStream::from(expanded)
}