diff options
Diffstat (limited to 'tests/ui/generic-associated-types/issue-74824.rs')
-rw-r--r-- | tests/ui/generic-associated-types/issue-74824.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/generic-associated-types/issue-74824.rs b/tests/ui/generic-associated-types/issue-74824.rs new file mode 100644 index 000000000..10c45d133 --- /dev/null +++ b/tests/ui/generic-associated-types/issue-74824.rs @@ -0,0 +1,25 @@ +#![feature(associated_type_defaults)] + +use std::ops::Deref; + +trait UnsafeCopy { + type Copy<T>: Copy = Box<T>; + //~^ ERROR the trait bound `Box<T>: Copy` is not satisfied + //~^^ ERROR the trait bound `T: Clone` is not satisfied + fn copy<T>(x: &Self::Copy<T>) -> Self::Copy<T> { + *x + } +} + +impl<T> UnsafeCopy for T {} + +fn main() { + let b = Box::new(42usize); + let copy = <()>::copy(&b); + + let raw_b = Box::deref(&b) as *const _; + let raw_copy = Box::deref(©) as *const _; + + // assert the addresses. + assert_eq!(raw_b, raw_copy); +} |