mapper_impl/
lib.rs

1#![feature(trait_alias)]
2#![feature(hash_set_entry)]
3
4mod ast;
5mod attr;
6mod common;
7mod expand;
8mod valid;
9extern crate proc_macro;
10
11use syn::parse_macro_input;
12use syn::DeriveInput;
13
14#[proc_macro_derive(Mapper, attributes(to))]
15pub fn derive_mapper(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
16    let input = parse_macro_input!(input as DeriveInput);
17    expand::derive(&input)
18        .unwrap_or_else(|err| err.to_compile_error())
19        .into()
20}