1 error[E0214]: parenthesized type parameters may only be used with a `Fn` trait
2 --> $DIR/unboxed-closure-sugar-used-on-struct-3.rs:14:13
4 LL | let b = Bar::(isize, usize)::new(); // OK too (for the parser)
5 | ^^^^^^^^^^^^^^^^^^^ only `Fn` traits may use parentheses
7 help: use angle brackets instead
9 LL | let b = Bar::<isize, usize>::new(); // OK too (for the parser)
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0214`.