wasm-bindgen/crates/macro/src/lib.rs

#![doc(html_root_url = "https://docs.rs/wasm-bindgen-macro/0.2")]

extern crate proc_macro;

use proc_macro::TokenStream;
use quote::quote;

#[proc_macro_attribute]
pub fn wasm_bindgen(attr: TokenStream, input: TokenStream) -> TokenStream {
    match wasm_bindgen_macro_support::expand(attr.into(), input.into()) {
        Ok(tokens) => {
            if cfg!(feature = "xxx_debug_only_print_generated_code") {
                println!("{}", tokens);
            }
            tokens.into()
        }
        Err(diagnostic) => (quote! { #diagnostic }).into(),
    }
}

#[proc_macro_attribute]
pub fn __wasm_bindgen_class_marker(attr: TokenStream, input: TokenStream) -> TokenStream {
    match wasm_bindgen_macro_support::expand_class_marker(attr.into(), input.into()) {
        Ok(tokens) => {
            if cfg!(feature = "xxx_debug_only_print_generated_code") {
                println!("{}", tokens);
            }
            tokens.into()
        }
        Err(diagnostic) => (quote! { #diagnostic }).into(),
    }
}