src/test/ui/derives/deriving-with-repr-packed.rs

   1 #![deny(unaligned_references)]
   2
   3 // check that derive on a packed struct with non-Copy fields
   4 // correctly. This can't be made to work perfectly because
   5 // we can't just use the field from the struct as it might
   6 // not be aligned.
   7
   8 #[derive(Copy, Clone, PartialEq, Eq)]
   9 //~^ ERROR `#[derive]` can't be used
  10 //~| hard error
  11 //~^^^ ERROR `#[derive]` can't be used
  12 //~| hard error
  13 #[repr(packed)]
  14 pub struct Foo<T>(T, T, T);
  15
  16 #[derive(PartialEq, Eq)]
  17 //~^ ERROR `#[derive]` can't be used
  18 //~| hard error
  19 #[repr(packed)]
  20 pub struct Bar(u32, u32, u32);
  21
  22 #[derive(PartialEq)]
  23 struct Y(usize);
  24
  25 #[derive(PartialEq)]
  26 //~^ ERROR `#[derive]` can't be used
  27 //~| hard error
  28 #[repr(packed)]
  29 struct X(Y);
  30
  31 fn main() {}