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Small refactor with Iterator::reduce

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This commit is contained in:
Cameron Steffen 2021-02-04 15:44:24 -06:00
parent f9435f4c92
commit c89b9d97e2
1 changed files with 2 additions and 3 deletions
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5
compiler/rustc_resolve/src/diagnostics.rs
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@ -1111,10 +1111,9 @@ impl<'a> Resolver<'a> {
_,
) = binding.kind
{
let def_id = (&*self).parent(ctor_def_id).expect("no parent for a constructor");
let def_id = self.parent(ctor_def_id).expect("no parent for a constructor");
let fields = self.field_names.get(&def_id)?;
let first_field = fields.first()?; // Handle `struct Foo()`
return Some(fields.iter().fold(first_field.span, |acc, field| acc.to(field.span)));
return fields.iter().map(|name| name.span).reduce(Span::to); // None for `struct Foo()`
}
None
}