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Fix support for tuple structs in Outgoing derive

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This commit is contained in:
Jonas Platte 2019-11-28 21:43:50 +01:00
parent 9fa1305e65
commit 3696516679
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GPG Key ID: 7D261D771D915378
1 changed files with 18 additions and 6 deletions
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24
ruma-api-macros/src/derive_outgoing.rs
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@ -11,6 +11,11 @@ mod wrap_incoming;
use wrap_incoming::Meta;
enum StructKind {
Struct,
Tuple,
}
pub fn expand_derive_outgoing(input: DeriveInput) -> syn::Result<TokenStream> {
if !input.generics.params.is_empty() {
return Err(syn::Error::new_spanned(
@ -25,13 +30,17 @@ pub fn expand_derive_outgoing(input: DeriveInput) -> syn::Result<TokenStream> {
quote!(#[derive(ruma_api::exports::serde::Deserialize)])
};
let mut fields: Vec<_> = match input.data {
let (mut fields, struct_kind): (Vec<_>, _) = match input.data {
Data::Enum(_) | Data::Union(_) => {
panic!("#[derive(Outgoing)] is only supported for structs")
}
Data::Struct(s) => match s.fields {
Fields::Named(fs) => fs.named.into_pairs().map(Pair::into_value).collect(),
Fields::Unnamed(fs) => fs.unnamed.into_pairs().map(Pair::into_value).collect(),
Fields::Named(fs) => {
(fs.named.into_pairs().map(Pair::into_value).collect(), StructKind::Struct)
}
Fields::Unnamed(fs) => {
(fs.unnamed.into_pairs().map(Pair::into_value).collect(), StructKind::Tuple)
}
Fields::Unit => return Ok(impl_outgoing_with_incoming_self(input.ident)),
},
};
@ -76,12 +85,15 @@ pub fn expand_derive_outgoing(input: DeriveInput) -> syn::Result<TokenStream> {
let original_ident = input.ident;
let incoming_ident = Ident::new(&format!("Incoming{}", original_ident), Span::call_site());
let struct_def = match struct_kind {
StructKind::Struct => quote! { { #(#fields,)* } },
StructKind::Tuple => quote! { ( #(#fields,)* ); },
};
Ok(quote! {
#[doc = #doc]
#derive_deserialize
#vis struct #incoming_ident {
#(#fields,)*
}
#vis struct #incoming_ident #struct_def
impl ruma_api::Outgoing for #original_ident {
type Incoming = #incoming_ident;