wincode_derive/
lib.rs

1//! Derive macros for `SchemaWrite` and `SchemaRead`.
2//!
3//! Note using this on packed structs is UB.
4//!
5//! Refer to the [`wincode`](https://docs.rs/wincode) crate for examples.
6use {
7    proc_macro::TokenStream,
8    syn::{parse_macro_input, DeriveInput},
9};
10
11mod common;
12mod schema_read;
13mod schema_write;
14
15/// Implement `SchemaWrite` for a struct or enum.
16#[proc_macro_derive(SchemaWrite, attributes(wincode))]
17pub fn derive_schema_write(input: TokenStream) -> TokenStream {
18    let input = parse_macro_input!(input as DeriveInput);
19    match schema_write::generate(input) {
20        Ok(tokens) => tokens.into(),
21        Err(e) => e.write_errors().into(),
22    }
23}
24
25/// Implement `SchemaRead` for a struct or enum.
26#[proc_macro_derive(SchemaRead, attributes(wincode))]
27pub fn derive_schema_read(input: TokenStream) -> TokenStream {
28    let input = parse_macro_input!(input as DeriveInput);
29    match schema_read::generate(input) {
30        Ok(tokens) => tokens.into(),
31        Err(e) => e.write_errors().into(),
32    }
33}