src/test/ui/lint/unused_braces_borrow.rs

   1 // check-pass
   2 #![warn(unused_braces)]
   3
   4 // changing `&{ expr }` to `&expr` changes the semantic of the program
   5 // so we should not warn this case
   6
   7 #[repr(packed)]
   8 struct A {
   9     a: u8,
  10     b: u32,
  11 }
  12
  13 fn consume<T>(_: T) {}
  14
  15 fn main() {
  16     let a = A {
  17         a: 42,
  18         b: 1729,
  19     };
  20
  21     consume(&{ a.b });
  22     consume({ a.b });
  23     //~^ WARN unnecessary braces
  24 }