derive_com_wrapper/
lib.rs

1#![recursion_limit = "1024"]
2
3#[macro_use]
4extern crate quote;
5#[macro_use]
6extern crate syn;
7
8extern crate proc_macro;
9extern crate proc_macro2;
10
11use proc_macro::TokenStream;
12use syn::DeriveInput;
13
14mod com_wrapper;
15
16#[proc_macro_derive(ComWrapper, attributes(com))]
17pub fn derive_com_wrapper(input: TokenStream) -> TokenStream {
18    let input = parse_macro_input!(input as DeriveInput);
19    com_wrapper::expand_com_wrapper(&input)
20        .unwrap_or_else(compile_error)
21        .into()
22}
23
24fn compile_error(message: String) -> proc_macro2::TokenStream {
25    quote! {
26        compile_error!(#message);
27    }
28}
29