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Track field index in internal AST

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This commit is contained in:
David Tolnay
2018-05-19 20:47:40 -07:00
parent 4fa2a50f62
commit 7ada27014d
5 changed files with 66 additions and 90 deletions
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serde_derive/src/pretend.rs
+4 -4
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@@ -113,8 +113,8 @@ fn pretend_variants_used(cont: &Container) -> Tokens {
let pat = match variant.style {
Style::Struct => {
let names = variant.fields.iter().map(|field| field.ident);
quote!({ #(#names: #placeholders),* })
let members = variant.fields.iter().map(|field| &field.member);
quote!({ #(#members: #placeholders),* })
}
Style::Tuple | Style::Newtype => quote!(( #(#placeholders),* )),
Style::Unit => quote!(),
@@ -134,8 +134,8 @@ fn pretend_variants_used(cont: &Container) -> Tokens {
}
fn struct_pattern(fields: &[Field]) -> Tokens {
let names = fields.iter().map(|field| field.ident);
let members = fields.iter().map(|field| &field.member);
let placeholders =
(0..fields.len()).map(|i| Ident::new(&format!("__v{}", i), Span::call_site()));
quote!({ #(#names: ref #placeholders),* })
quote!({ #(#members: ref #placeholders),* })
}