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item_impl holds an Option<> to the trait ref, not a list of trait refs. Therefore, we should not iterate over it.

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This commit is contained in:
Nick Cameron 2014-01-09 21:42:28 +13:00
parent 28ddc6537f
commit 40d8a12b68
1 changed files with 6 additions and 5 deletions
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11
src/libsyntax/visit.rs
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@ -223,12 +223,13 @@ pub fn walk_item<E: Clone, V: Visitor<E>>(visitor: &mut V, item: &Item, env: E)
walk_enum_def(visitor, enum_definition, type_parameters, env)
}
ItemImpl(ref type_parameters,
ref trait_references,
typ,
ref methods) => {
ref trait_reference,
typ,
ref methods) => {
visitor.visit_generics(type_parameters, env.clone());
for trait_reference in trait_references.iter() {
walk_trait_ref(visitor, trait_reference, env.clone())
match *trait_reference {
Some(ref trait_reference) => walk_trait_ref(visitor, trait_reference, env.clone()),
None => ()
}
visitor.visit_ty(typ, env.clone());
for method in methods.iter() {