thiserror_impl_no_std/
lib.rs

1#![allow(
2    clippy::blocks_in_if_conditions,
3    clippy::cast_lossless,
4    clippy::cast_possible_truncation,
5    clippy::manual_map,
6    clippy::map_unwrap_or,
7    clippy::needless_pass_by_value,
8    clippy::option_if_let_else,
9    clippy::range_plus_one,
10    clippy::single_match_else,
11    clippy::too_many_lines,
12    clippy::wrong_self_convention
13)]
14
15extern crate proc_macro;
16
17mod ast;
18mod attr;
19mod expand;
20mod fmt;
21mod generics;
22mod prop;
23mod valid;
24
25use proc_macro::TokenStream;
26use syn::{parse_macro_input, DeriveInput};
27
28#[proc_macro_derive(Error, attributes(backtrace, error, from, source))]
29pub fn derive_error(input: TokenStream) -> TokenStream {
30    let input = parse_macro_input!(input as DeriveInput);
31    expand::derive(&input)
32        .unwrap_or_else(|err| err.to_compile_error())
33        .into()
34}