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Ask proc_macro_derive to ignore serde attributes

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This commit is contained in:
David Tolnay
2016-11-15 21:29:34 -05:00
parent 133d117bf4
commit a16f07858b
4 changed files with 22 additions and 88 deletions
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serde_derive/src/lib.rs
+4 -11
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@@ -4,27 +4,20 @@
extern crate proc_macro;
extern crate serde_codegen;
#[macro_use]
extern crate post_expansion;
use proc_macro::TokenStream;
#[proc_macro_derive(Serialize)]
#[proc_macro_derive(Serialize, attributes(serde))]
pub fn derive_serialize(input: TokenStream) -> TokenStream {
let item = format!("#[derive(Serialize)]\n{}", input);
match serde_codegen::expand_single_item(&item) {
match serde_codegen::expand_derive_serialize(&input.to_string()) {
Ok(expanded) => expanded.parse().unwrap(),
Err(msg) => panic!(msg),
}
}
#[proc_macro_derive(Deserialize)]
#[proc_macro_derive(Deserialize, attributes(serde))]
pub fn derive_deserialize(input: TokenStream) -> TokenStream {
let item = format!("#[derive(Deserialize)]\n{}", input);
match serde_codegen::expand_single_item(&item) {
match serde_codegen::expand_derive_deserialize(&input.to_string()) {
Ok(expanded) => expanded.parse().unwrap(),
Err(msg) => panic!(msg),
}
}
register_post_expansion!(PostExpansion_serde);