explicit_error_derive/
lib.rs

1extern crate proc_macro;
2extern crate proc_macro2;
3extern crate quote;
4extern crate syn;
5
6#[cfg(feature = "actix-web")]
7mod actix;
8#[cfg(any(feature = "exit", feature = "actix-web"))]
9mod domain;
10
11#[cfg(any(feature = "http", feature = "exit", feature = "actix-web"))]
12use proc_macro::TokenStream;
13#[cfg(feature = "http")]
14use quote::quote;
15#[cfg(any(feature = "http", feature = "exit", feature = "actix-web"))]
16use syn::{DeriveInput, parse_macro_input};
17
18#[cfg(feature = "http")]
19#[proc_macro_derive(HttpError)]
20pub fn derive_http_error(input: TokenStream) -> TokenStream {
21    let input = parse_macro_input!(input as DeriveInput);
22
23    domain::derive(input, "explicit_error_http")
24        .unwrap_or_else(syn::Error::into_compile_error)
25        .into()
26}
27
28#[cfg(feature = "exit")]
29#[proc_macro_derive(ExitError)]
30pub fn derive_bin_error(input: TokenStream) -> TokenStream {
31    let input = parse_macro_input!(input as DeriveInput);
32
33    domain::derive(input, "explicit_error_exit")
34        .unwrap_or_else(syn::Error::into_compile_error)
35        .into()
36}
37
38#[cfg(feature = "actix-web")]
39#[proc_macro_derive(HandlerError)]
40pub fn derive_actix_handler_error(input: TokenStream) -> TokenStream {
41    let input = parse_macro_input!(input as DeriveInput);
42
43    actix::derive(input)
44        .unwrap_or_else(syn::Error::into_compile_error)
45        .into()
46}
47
48#[cfg(feature = "http")]
49#[proc_macro_derive(JSONDisplay)]
50pub fn json_display(input: TokenStream) -> TokenStream {
51    let input = parse_macro_input!(input as DeriveInput);
52    let ident = input.ident;
53    let (impl_generics, ty_generics, where_clause) = input.generics.split_for_impl();
54
55    let expanded = quote! {
56        #[automatically_derived]
57        impl #impl_generics std::fmt::Display for #ident #ty_generics #where_clause {
58            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
59                write!(f, "{}", serde_json::json!(self))
60            }
61        }
62    };
63
64    TokenStream::from(expanded)
65}
explicit_error_derive/lib.rs

explicit_error_derive/
lib.rs
