Support #[derive(Serialize, Deserialize)] when using associated types #1213
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dtolnay
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Apr 11, 2018
serde_derive/src/bound.rs
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| .flat_map(|field| { | ||
| let field_ty = field.ty; | ||
| let field_bound: Option<syn::WherePredicate> = match (field_ty, gen_bound_where(&field.attrs)) { | ||
| (&syn::Type::Path(ref ty_path), true) => match (ty_path.path.segments.first(), generics.params.first()) { |
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Please make this work even if the associated type is not from the first generic parameter.
#[derive(Serialize, Deserialize)]
struct AssocDerive<S, T: AssocSerde> {
s: S,
assoc: T::Assoc,
}
dtolnay
reviewed
Apr 11, 2018
serde_derive/src/bound.rs
Outdated
| ) -> syn::Generics | ||
| where | ||
| F: Fn(&attr::Field) -> Option<&[syn::WherePredicate]>, | ||
| W: for<'a> Fn(&attr::Field) -> bool, |
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The 'a lifetime parameter is never used.
|
Thanks btw! This is going to fix a quite common stumbling block. |
Also, removes extraneous `where for`
|
Those errors should be fixed now. |
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Prior to this, structs and enums that had fields using associated types wouldn't have the appropriate where bounds set. This fixes that, meaning that this now builds:
Fixes #1208.