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extern crate proc_macro; mod attr; mod expand; mod fmt; use proc_macro::TokenStream; use syn::{parse_macro_input, DeriveInput}; #[proc_macro_derive(DisplayDoc)] pub fn derive_error(input: TokenStream) -> TokenStream { let input = parse_macro_input!(input as DeriveInput); expand::derive(&input) .unwrap_or_else(|err| err.to_compile_error()) .into() }