diff options
Diffstat (limited to 'tests/ui/consts/assoc_const_generic_impl.rs')
-rw-r--r-- | tests/ui/consts/assoc_const_generic_impl.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/consts/assoc_const_generic_impl.rs b/tests/ui/consts/assoc_const_generic_impl.rs new file mode 100644 index 000000000..3475c862b --- /dev/null +++ b/tests/ui/consts/assoc_const_generic_impl.rs @@ -0,0 +1,19 @@ +// build-fail + +trait ZeroSized: Sized { + const I_AM_ZERO_SIZED: (); + fn requires_zero_size(self); +} + +impl<T: Sized> ZeroSized for T { + const I_AM_ZERO_SIZED: () = [()][std::mem::size_of::<Self>()]; //~ ERROR evaluation of `<u32 as ZeroSized>::I_AM_ZERO_SIZED` failed + fn requires_zero_size(self) { + let () = Self::I_AM_ZERO_SIZED; + println!("requires_zero_size called"); + } +} + +fn main() { + ().requires_zero_size(); + 42_u32.requires_zero_size(); +} |