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
55
|
// Copyright 2024 Gabriel Bjørnager Jensen.
//
// This file is part of bZipper.
//
// bZipper is free software: you can redistribute
// it and/or modify it under the terms of the GNU
// Lesser General Public License as published by
// the Free Software Foundation, either version 3
// of the License, or (at your option) any later
// version.
//
// bZipper is distributed in the hope that it will
// be useful, but WITHOUT ANY WARRANTY; without
// even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Less-
// er General Public License along with bZipper. If
// not, see <https://www.gnu.org/licenses/>.
use proc_macro2::TokenStream;
use quote::quote;
use syn::{DataStruct, Fields, Token};
use syn::punctuated::Punctuated;
#[must_use]
pub fn decode_struct(data: &DataStruct) -> TokenStream {
let mut chain_commands = Punctuated::<TokenStream, Token![,]>::new();
for field in &data.fields {
let command = field.ident
.as_ref()
.map_or_else(
|| quote! { ::bzipper::Decode::decode(stream)? },
|field_name| quote! { #field_name: ::bzipper::Decode::decode(stream)? },
);
chain_commands.push(command);
}
let value = match data.fields {
Fields::Named( ..) => quote! { Self { #chain_commands } },
Fields::Unnamed(..) => quote! { Self(#chain_commands) },
Fields::Unit => quote! { Self },
};
quote! {
#[inline]
fn decode(stream: &mut ::bzipper::IStream) -> ::core::result::Result<Self, ::bzipper::error::DecodeError> {
let value = #value;
Ok(value)
}
}
}
|
