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#![forbid(unsafe_code)]
#[macro_use]
extern crate syn;
#[macro_use]
extern crate quote;
#[macro_use]
mod macros;
mod data;
mod serialize;
use proc_macro2::TokenStream;
#[proc_macro_derive(AsyncSerialization)]
pub fn derive_diny_aysnc_serialization(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
parse_input(&parse_macro_input!(input as syn::DeriveInput))
.map_or_else(
|err| err,
|def| {
let ser = wrap_in_const_unit_block(serialize::code::generate_async_serialize (&def));
let de = wrap_in_const_unit_block(serialize::code::generate_async_deserialize(&def));
quote! {
#ser
#de
}
}
)
.into()
}
#[proc_macro_derive(AsyncSerialize)]
pub fn derive_diny_async_serialize(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
parse_input(&parse_macro_input!(input as syn::DeriveInput))
.map_or_else(
|err| err,
|def| wrap_in_const_unit_block(serialize::code::generate_async_serialize(&def))
)
.into()
}
#[proc_macro_derive(AsyncDeserialize)]
pub fn derive_diny_async_deserialize(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
parse_input(&parse_macro_input!(input as syn::DeriveInput))
.map_or_else(
|err| err,
|def| wrap_in_const_unit_block(serialize::code::generate_async_deserialize(&def))
)
.into()
}
fn parse_input(input: &syn::DeriveInput) -> Result<data::Def, TokenStream> {
let mut errors = data::Errors::new();
data::Def::parse_input(input, &mut errors)
.map_or_else(
|_| {
let e: TokenStream = errors.into();
Err(quote! { #e })
},
Ok
)
}
fn wrap_in_const_unit_block(output: TokenStream) -> TokenStream {
quote! {
const _: () = {
#output
};
}
}