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Add support for variadic functions

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This commit is contained in:
Isaac Clayton 2022-06-06 09:18:40 +02:00
parent 17d15b2f08
commit 805c86b781
1 changed files with 13 additions and 2 deletions
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15
crates/plugin_macros/src/lib.rs
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@ -19,6 +19,17 @@ pub fn bind(args: TokenStream, function: TokenStream) -> TokenStream {
let inner_fn_name = format_ident!("{}", inner_fn.sig.ident);
let outer_fn_name = format_ident!("__{}", inner_fn_name);
let variadic = inner_fn.sig.inputs.len();
let mut args = vec![];
for i in 0..variadic {
let ident = format_ident!("__{}_arg_{}", inner_fn_name, i);
args.push(ident);
}
let args = quote! {
( #(args ,) )*
};
TokenStream::from(quote! {
#[no_mangle]
#inner_fn
@ -30,8 +41,8 @@ pub fn bind(args: TokenStream, function: TokenStream) -> TokenStream {
let data = unsafe { buffer.to_vec() };
// operation
let argument = ::plugin::bincode::deserialize(&data).unwrap();
let result = #inner_fn_name(argument);
let #args = ::plugin::bincode::deserialize(&data).unwrap();
let result = #inner_fn_name #args;
let new_data: Result<Vec<u8>, _> = ::plugin::bincode::serialize(&result);
let new_data = new_data.unwrap();