1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
use proc_macro2::TokenStream;
use proc_macro_error::abort_call_site;
use quote::quote;
use syn::Data;
use crate::utils::{crate_ident_new, gen_enum_from_glib, parse_name};
pub fn impl_error_domain(input: &syn::DeriveInput) -> TokenStream {
let name = &input.ident;
let enum_variants = match input.data {
Data::Enum(ref e) => &e.variants,
_ => abort_call_site!("#[derive(glib::ErrorDomain)] only supports enums"),
};
let domain_name = match parse_name(input, "error_domain") {
Ok(name) => name,
Err(e) => abort_call_site!(
"{}: #[derive(glib::ErrorDomain)] requires #[error_domain(name = \"DomainName\")]",
e
),
};
let crate_ident = crate_ident_new();
let from_glib = gen_enum_from_glib(name, enum_variants);
quote! {
impl #crate_ident::error::ErrorDomain for #name {
fn domain() -> #crate_ident::Quark {
use #crate_ident::translate::from_glib;
static QUARK: #crate_ident::once_cell::sync::Lazy<#crate_ident::Quark> =
#crate_ident::once_cell::sync::Lazy::new(|| unsafe {
from_glib(#crate_ident::ffi::g_quark_from_static_string(concat!(#domain_name, "\0") as *const str as *const _))
});
*QUARK
}
fn code(self) -> i32 {
self as i32
}
fn from(value: i32) -> ::core::option::Option<Self>
where
Self: Sized
{
#from_glib
}
}
}
}